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GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B 1/00; { electromagnetic shielding H05K 9/0001} )
Definition statement
This subclass/group covers:

Building constructions, i.e. construction of edifices, their structural or non structural walls, their roof structures, their floor structures, suspended or false ceilings;

Insulation of buildings or other protection of buildings.

References relevant to classification in this subclass
This subclass/group does not cover:
Devices for fastening or securing general constructional elements or machine parts together
Motor vehicles
Railway vehicles
Ships or other waterborne vessels
Aircrafts; Cosmonautics
Structures specially adapted for buildings for special purposes, general layout of buildings, e.g. modular co-ordination; Masts; Tents;Swimming pools
Small buildings for limited occupation, e.g. kiosks, waiting shelters for bus stops
Buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquakes, hurricanes
Structural elements for building construction
Roof coverings
Finishing work on buildings, e.g. lining, flooring
Scaffolding;Shuttering
Bridges
Foundations
Border constructions of opening in walls, floors or ceilings
Electromagnetic shielding
Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs (scaffolds, shutteringsE04G; structures specially adapted for buildings for special purposes, general layout of buildings, e.g. modular co-ordination,E04H; the particular parts of buildings, see the relevant groups for those parts)
Definition statement
This subclass/group covers:

Building constructions in general, i.e. construction of edifices; Structures of buildings which are not restricted either to walls, or floors or ceilings or roofs.

Special structures and methods of construction of buildings, e.g. arched, movable, collapsible, box-like structures; Connections for building structures, e.g. connections of slab-shaped or elongated members; Insulation or other protection of buildings, e.g. against water-damage, heat, sound, fire.

References relevant to classification in this group
This subclass/group does not cover:
Scaffolds, shutterings
Partitions per se
Floor structures per se
Roof structures per se
Suspended or false ceilings per se
Roof coverings per se
Foundations per se
Structures specially adapted for buildings for special purposes;General layout of buildings, e.g. modular co-ordination
{Base structures; Cellars}
Definition statement
This subclass/group covers:

Cellars, basements, also retrofitted under existing buildings;

Crawl spaces.

Relationship between large subject matter areas

This subgroup covers foundations with the emphasis on the connection to a superstructure, as opposed to E02D where the emphasis is on the connection to the ground;

References relevant to classification in this group
This subclass/group does not cover:
Foundations per se
Drainage and exterior waterproofing of foundation
Special rules of classification within this group

Exterior insulation of cellars is classified here.

{Building characterised by incorporated canalisations (E04B 1/34869, E03C 1/01, E04C 2/52, E04F 17/00 take precedence; canalisation per se F16L; conducts for ventilation, heating systems or air-conditioning F24) }
Definition statement
This subclass/group covers:

Building with passages for fluids integrally formed with structural elements of the building.

References relevant to classification in this group
This subclass/group does not cover:
Building envelopes with canalisations for insulation purposes
Box-like or cell-like units for special technical purposes
Domestic plumbing installations for combinations of baths, showers, sinks, wash-basins, closets, urinals, or the like
Slab-shaped or panel-shaped building elements for locating conduits
Vertical ducts
Canalisation per se
Conducts for ventilation, heating systems or air-conditioning
Special adaptation of floor structures for incorporating ducts
{Loggias}
Definition statement
This subclass/group covers:

Loggias, wintergardens, enclosed balconies, verandas.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Glass roofs
Bay windows
Greenhouses
Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements (E04B 1/32 to E04B 1/36 take precedence)
Definition statement
This subclass/group covers:

Structures consisting primarily of large load-supporting panels or large load-supporting panel-shaped blocks.

References relevant to classification in this group
This subclass/group does not cover:
Arched, vaulted or folded structures
Extraordinary structures
Structures covering a large free area
Structures characterised by movebale, separable or collapsible parts
Structures composed of e.g. box-like or cell-like units
Extraordinary methods of construction
Bearings or like supports allowing movement
Masonry walls
the elements consisting of other material
Definition statement
This subclass/group covers:

Structures with elements consisting of specified materials other than concrete, stone-like material, metal or wood.

the elements being composed of two or more materials (of reinforced concrete E04B 1/04)
Definition statement
This subclass/group covers:

Structures with elements consisting of the combination of two or more specified structural materials.

References relevant to classification in this group
This subclass/group does not cover:
Structures consisting primarily of reinforced concrete block-shaped or slab-shaped elements
Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material (E04B 1/32 to E04B 1/36 take precedence)
References relevant to classification in this group
This subclass/group does not cover:
Arched, vaulted or folded structures
Extraordinary structures
Structures covering a large free area
Structures characterised by moveable, separable or collapsible parts
Structures composed of e.g. box-like or cell-like units
Extraordinary methods of construction
Bearings or like supports allowing movement
{with vertical and horizontal slabs, both being partially cast in situ}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Stacked prefabricated cells, e.g. with concrete poured between the cells
Permanent inflatable forms for concrete
Special rules of classification within this group

Use E04B 2/84 to E04B 2002/8694 for classifying additional information of details of lost formwork of cast in-situ walls.

{with vertical and horizontal slabs, only the vertical slabs being partially cast in situ (E04B 2/86 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Walls made by casting in-situ in permanent forms
Special rules of classification within this group

Use E04B 2/84 to E04B 2002/8694 for classifying additional information of details of lost formwork of cast in-situ walls.

{with elongated load-supporting parts, cast in situ; E04B 1/161, E04B 1/163 and E04B 1/164 take precedence}
References relevant to classification in this group
This subclass/group does not cover:
Structures made from masses with vertical and horizontal slabs, both being partially cast in situ
Structures made from masses with vertical and horizontal slabs, only the vertical slabs being partially cast in situ
Structures made from masses with vertical and horizontal slabs, only the horizontal slabs being partially cast in situ
{with curved surfaces, at least partially cast in situ in order to make a continuous concrete shell structure (E04B 1/169 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Structures made from masses cast with inflatable flexible permanent forms
Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons (E04B 1/32 to E04B 1/36 take precedence; elongated load-supporting parts as elements, trusses, truss-like structures E04C 3/00)
Definition statement
This subclass/group covers:

Structures comprising elongated load-supporting parts, e.g. columns, beams, girders, skeletons.

References relevant to classification in this group
This subclass/group does not cover:
Arched, vaulted or folded structures
Extraordinary structures
Structures covering a large free area
Structures characterised by moveable, separable or collapsible parts
Structures composed of e.g. box-like or cell-like units
Extraordinary methods of construction
Bearings or like supports allowing movement
Elongated load-supporting parts as elements, columns, beams, girders, trusses, truss-like structures
Connection of bar-shaped building elements, i.e. of smaller cross-section
Log cabins
Special rules of classification within this group

Structures made from a horizontal or vertical juxtaposition of elongated elements other than wood are classified in E04B 1/18;

Structures made from a juxtaposition of porticos or stacks of frames are only classified in E04B 1/18, irrespective of the material of the elongated elements.

Three-dimensional framework structures {folded structures and grid-like formations acting as shell structures E04B 7/10}
Definition statement
This subclass/group covers:

Space frames, i.e. truss-like lightweight structures constructed from interconnected struts in a geometric pattern spanning a large area, with either short struts connected at the nodes or continuous struts folded at the nodes.

References relevant to classification in this group
This subclass/group does not cover:
Cosmonautics
Roof structures with folded or grid-like formations acting as shell structures
Informative references
Attention is drawn to the following places, which may be of interest for search:
Trusses
Truss-like towers or mats
Special rules of classification within this group

Documents showing large parts of the space frame are classified here, even if they show details of component parts or their connections; Use E04B 1/1903 to E04B 2001/1996 for classifying additional information of the details of the component parts of the space frame, their connections and the type of space frame for the documents classified in E04B 1/19.

{ Connecting nodes specially adapted therefor}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Node corner connector for furniture
Special rules of classification within this group

Use E04B 2001/1924 to E04B 2001/1996 for classifying additional information of the details of the component parts of the space frame, their connections and the type of space frame for the documents classified in E04B 1/1903

{with central spherical, semispherical or polyhedral connecting element}
Special rules of classification within this group

Use E04B 2001/1924 to E04B 2001/1996 for classifying additional information of the details of the component parts of the space frame, their connections and the type of space frame for the documents classified in E04B 1/1906

{with central cylindrical connecting element}
Special rules of classification within this group

Use E04B 2001/1924 to E04B 2001/1996 for classifying additional information of the details of the component parts of the space frame, their connections and the type of space frame for the documents classified in E04B 1/1909.

{with central cubical connecting element}
Special rules of classification within this group

Use E04B 2001/1924 to E04B 2001/1996 for classifying additional information of the details of the component parts of the space frame, their connections and the type of space frame for the documents classified in E04B 1/1912.

the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
Definition statement
This subclass/group covers:

Structures with posts and beams made from concrete.

References relevant to classification in this group
This subclass/group does not cover:
Space frames
Special rules of classification within this group

Documents showing large parts of the structure are classified here, even if they show details of connections.

the supporting parts consisting of metal
Definition statement
This subclass/group covers:

Structures with posts and beams made of metal

References relevant to classification in this group
This subclass/group does not cover:
Space frames
Special rules of classification within this group

Documents showing large parts of the structure are classified here, even if they show details of component parts and their connections. Use E04B 1/2403 to E04B 2001/2496 for classifying additional information of the details of the component parts and their connections of the structures classified in E04B 1/24.

{Connection details of the elongated load-supporting parts}
References relevant to classification in this group
This subclass/group does not cover:
Connection of bar-shaped, i.e. of smaller cross-section, building elements
Special rules of classification within this group

Use E04B 2001/2466 to E04B 2001/2496 for classifying additional information of the documents classified in E04B 1/2403.

the supporting parts consisting of wood
Definition statement
This subclass/group covers:

Structures with posts and beams made of wood.

References relevant to classification in this group
This subclass/group does not cover:
Space frames
Log cabins
Caps for the protection of the ends of wooden beams against humidity
Informative references
Attention is drawn to the following places, which may be of interest for search:
Load-bearing walls with posts of wood
Special rules of classification within this group

Documents showing large parts of the structure are classified here, even if they show details of component parts and their connections; Use E04B 1/2604 to E04B 2001/2696 for classifying additional information of the documents classified in E04B 1/26.

{ Connections specially adapted therefor (shear dowels E04B 1/486, E04B 1/49) }
References relevant to classification in this group
This subclass/group does not cover:
Shear dowels for wood
Shear dowels for wood with self-penetrating parts
Special rules of classification within this group

Use E04B 2001/2696 for classifying additional information of the documents classified in E04B 1/2604.

{Connectors made from folded sheet metal (E04B 1/2612 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Joist hangers
the supporting parts consisting of other material
Definition statement
This subclass/group covers:

Structures with posts and beams made of specified material other than concrete, stone-like material, metal, wood.

References relevant to classification in this group
This subclass/group does not cover:
Space frames
Structures with posts and beams made of the combination of at least two different materials having a structural function
the supporting parts being composed of two or more materials; Composite steel and concrete constructions (of reinforced concrete E04B 1/20)
Definition statement
This subclass/group covers:

Structures with posts and beams made of at least two specified different materials having a structural function, e.g. a steel pipe filled with concrete

References relevant to classification in this group
This subclass/group does not cover:
Space frames
Structures made of elongated load supporting parts made of reinforced concrete
Arched structures; Vaulted structures; Folded structures ( {E04B 1/34378 takes precedence;} vaulted roofs E04B 7/08)
Definition statement
This subclass/group covers:

Arched structures; Vaulted structures; Arched or vaulted structures with a folded surface.

References relevant to classification in this group
This subclass/group does not cover:
Structures deriving their rigidity from concertina folds
Vaulted roof structures
Special rules of classification within this group

Use E04B 2001/3217 to E04B 2001/3294 for classifying additional information of the component parts, their connections and the type of structures of the documents classified in E04B 1/32 to E04B 1/3211.

Do not use E04B 2001/0061 to classify the documents of E04B 1/32 to E04B 1/3211

{Structures with a longitudinal horizontal axis, e.g. cylindrical or prismatic structures}
Definition statement
This subclass/group covers:

Structures in the shape of a portion of a cylinder, with a smooth or faceted surface.

{Structures with a vertical rotation axis or the like, e.g. semi-spherical structures}
Definition statement
This subclass/group covers:

Structures in the shape of a portion of a sphere, with a smooth or faceted surface.

Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability (E04B 1/342, E04B 1/343, E04B 1/348 take precedence; for floors E04B 5/43; buildings for special purposes, e.g. withstanding earthquake, E04H)
References relevant to classification in this group
This subclass/group does not cover:
Structures covering a large free area
Structures characterised by movable, separable or collapsible parts
Structures composed or box-like or cell-like units
Floor structures of extraordinary design; Features relating to the elastic stability of floors
Buildings for special purposes, e.g. withstanding earthquakes
Special rules of classification within this group

Exterior staircases retrofitted to buildings are classified in E04B 1/34.

{mainly supported by a central column or footing (E04B 1/3416 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Structures comprising mainly a central support and a cantilevered roof
{Structures comprising mainly a central support column and a cantilevered roof}
Definition statement
This subclass/group covers:

Mushroom-type structures or elongated structures having a "T" or "Y" vertical cross-section.

Structures covering a large free area, whether open-sided or not, e.g. hangars, halls (roof trusses E04C 3/00; non-structural features for specified purposes, see the relevant groups of E04H)
References relevant to classification in this group
This subclass/group does not cover:
Roof trusses
Non-structural features for specified purposes
Structures characterised by movable, separable, or collapsible parts, e.g. for transport (movable roof parts E04B 7/16; floatable buildings B63B; small prefabricated buildings, transportable as a whole E04H 1/12; small garages E04H 6/02; tents or canopies, in general E04H 15/00) {containers B65G}
References relevant to classification in this group
This subclass/group does not cover:
Movable roof parts
Floatable buildings
Small prefabricated buildings, transportable as a whole
Small garages
Tents or canopies, in general
Containers
{telescopic}
Definition statement
This subclass/group covers:

Structure with room-sized telescopic section extendable horizontally from a side of the structure or vertically from the top or bottom of the structure.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Caravans or campers with telescopic sections
Telescopic wheeled arched structures
Telescopic roofs
Swimming pools with movable roof sections
Special rules of classification within this group

Structures with more than one telescopic section extendable each from different surfaces of the structure, or with telescopic sections comprising two or more nested sub-sections are classified here;

Use E04B 2001/34394 for classifying additional information of documents showing vertically telescoping structures.

{with only one level of nesting}
Definition statement
This subclass/group covers:

Structure with a single telescopic section extendable horizontally from a side of the structure or vertically from the top or bottom of the structure

Special rules of classification within this group

Use E04B 2001/34394 for classifying additional information of documents showing vertically telescoping structures

{characterised by separable parts}
Special rules of classification within this group

Structures formed of a combination of structural elongated elements and structural panels are classified here.

Use E04B 2001/34389 for classifying additional information of documents showing a set of building elements forming a self-contained package for transport before assembly.

{mainly constituted by panels}
Special rules of classification within this group

Use E04B 2001/34389 for classifying additional information of documents showing a set of building elements forming a self-contained package for transport before assembly.

Use E04B 1/61 to E04B 2001/6195 for classifying additional information of the details of the connections of the panels.

{mainly constituted by longitudinal elements}
Special rules of classification within this group

Use E04B 2001/34389 for classifying additional information of documents showing a set of building elements forming a self-contained package for transport before assembly.

Use E04B 1/58 to E04B 2001/5893 for classifying additional information of the details of the connections of the longitudinal elements.

{Structures movable as a whole}
Definition statement
This subclass/group covers:

Mobile home structures

References relevant to classification in this group
This subclass/group does not cover:
Vehicle aspects of mobile homes
Structures composed of a number of box-like units
Special rules of classification within this group

Use E04B 1/34305, E04B 1/3431 and E04B 2001/34394 for classifying additional information of documents showing telescoping structures.

{Anchoring means therefor}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Ground anchors
{Foldable or retractable structures}
References relevant to classification in this group
This subclass/group does not cover:
Collapsibe structures with hinged parts
Special rules of classification within this group

Use E04B 2001/34389 for classifying additional information of documents showing a set of building elements forming a self-contained package for transport before assembly.

{with provisions to raise or lower the whole structure}
Definition statement
This subclass/group covers:

Structures with means for raising and lowering them above ground level;

Structures with means for retracting them into the ground and returning them to ground level.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Telescopic structures
Buildings raisable in case of floods
{Wheeled arch-type structures}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Roofs with movables sections
Swimming pools with movable roof sections
Greenhouses with sliding roofs
Weather protection for road works
Weather protection for building works
Special rules of classification within this group

Half-arches wheeled at one extremity against a building wall and at the other end on the ground are also classified here.

with hinged parts
Informative references
Attention is drawn to the following places, which may be of interest for search:
Collapsible caravans
Special rules of classification within this group

Use E04B 1/34336 for classifying additional information of documents showing mobile homes.

Do not use E04B 1/34321 to classify the documents of E04B 1/344.

{with articulated bar-shaped elements}
Special rules of classification within this group

Collapsible articulated space frames are classified here.

{foldable in a flat stack of parallel panels}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Collapsible large containers
Special rules of classification within this group

Do not use E04B 2001/34389 to classify the documents of E04B 1/3445 and E04B 1/3447.

{with rotating shell-forming segments}
Definition statement
This subclass/group covers:

Structures with rotating shell-forming segments, e.g. armadillo plates type structure.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Roof structures with movable sections
Swimming pools with movable roof sections
Rotary buildings; buildings with rotary units, e.g. rooms
Informative references
Attention is drawn to the following places, which may be of interest for search:
Turntable for vehicles
Carousels for milking stations
Special rules of classification within this group

Do not use E04B 2001/0061 to classify the documents of E04B 1/346.

Structures composed of units comprising at least considerable parts of two sides of a room, e.g. box-like or cell-like units closed or in skeleton form
Definition statement
This subclass/group covers:

Structures composed of units comprising at least considerable parts of two sides of a room, e.g. box-like or cell-like units closed or in skeleton form, i.e. only the edges of the boxes or cells are materialized (only frame, no infill panels)

Special rules of classification within this group

In E04B 1/348 to E04B 1/34861 use E04B 2001/34876 to E04B 2001/34892 for classifying additional information of documents showing sloping or barrel roof, or means allowing access to the structures.

{Elements integrated in a skeleton}
Definition statement
This subclass/group covers:

Box-like units resting on shelves or beams of a supporting structure;

Stacked cells with concrete poured between the cells.

{the supporting structure consisting of concrete}
Definition statement
This subclass/group covers:

Structures with the main vertical structural parts consisting of concrete.

{the supporting structure consisting of metal}
Definition statement
This subclass/group covers:

Structures with the main vertical structural parts consisting of metal.

{the supporting structure consisting of wood}
Definition statement
This subclass/group covers:

Structures with the main vertical structural parts consisting of wood.

{the supporting structure consisting of other specified material, e.g. of plastics}
Definition statement
This subclass/group covers:

Structures with the main vertical structural parts consisting of specified material other than concrete, metal, wood.

{the supporting structure being composed of two or more materials}
Definition statement
This subclass/group covers:

Structures with the main vertical structural parts consisting of the combination of two or more specified structural materials.

{Elements for special technical purposes, e.g. with a sanitary equipment (combination of baths, douches, sinks, wash-basins, closets or urinals A47K 4/00; plumbing installations for baths, douches, or the like, E03C 1/01; panels serving for locating conduits E04C 2/521; ducts for receiving installation lines E04F 17/08) }
Definition statement
This subclass/group covers:

Structures composed of units comprising at least considerable parts of two sides of a room where the units are pre-fitted for special technical purposes, e.g. with pre-fitted piping, plumbing, sanitary equipment or electrical wiring

References relevant to classification in this group
This subclass/group does not cover:
Combination of baths, douches, sinks, wash-basins, closets or urinals
Plumbing installations for baths, douches, or the like
Panels serving for locating conduits
Ducts for receiving installation lines
Informative references
Attention is drawn to the following places, which may be of interest for search:
Structures composed of a number of box-like units
Special rules of classification within this group

Use E04B 2001/34876 to E04B 2001/34892 for classifying additional information of documents of E04B 1/34869 showing sloping or barrel roof, or means allowing access to the structures.

Extraordinary methods of construction, e.g. lift-slab, jack-block (E04B 1/34 takes precedence; falsework, shuttering for shaping walls, floors, ceilings or roofs in situ E04G 11/04; conveying or assembling of building materials E04G 21/00; working measure on existing buildings E04G 23/00)
References relevant to classification in this group
This subclass/group does not cover:
Extraordinary structures
Falsework, shuttering for shaping walls, floors, ceilings or roofs in situ
Conveying or assembling of building materials
Working measures on existing buildings
Special rules of classification within this group

Use E04B 2001/3561 to E04B 2001/3594 for classifying additional information of the documents of E04B 1/35 to E04B 1/3555.

{characterised by the in-situ moulding of large parts of a structure (E04B 1/3511, E04B 1/3516, E04B 1/3522, E04B 1/3533, E04B 1/3544, E04B 1/355 take precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Lift-slab;Extraordinary methods of construction characterised by a purely vertical lifting of floors or roofs or parts thereof
Extraordinary methods of construction characterised by erecting a vertical structure and then adding the floors from top to bottom
Extraordinary methods of construction characterised by raising a structure and then adding structural elements under it
Extraordinary methods of construction characterised by the raising of hingedly-connected building elements, e.g. arches, portal frames
Extraordinary methods of construction characterised by the use of a central column to lift and temporarily or permanently support structural elements
Extraordinary methods of construction characterised by the tilting-up of whole buildings or sections thereof, e.g. walls, portal frames
Informative references
Attention is drawn to the following places, which may be of interest for search:
Structures made from masses cast in-situ
{characterised by raising a structure and then adding structural elements under it (E04B 1/3511, E04B 1/3516, E04B 1/3533 take precedence) }
Definition statement
This subclass/group covers:

Structure raisable using temporary supports, e.g. scaffolding or lifting machines, or permanent supports.

References relevant to classification in this group
This subclass/group does not cover:
Lift-slab; Extraordinary methods of construction characterised by a purely vertical lifting of floors or roofs or parts thereof
Extraordinary methods of construction characterised by erecting a vertical structure and then adding the floors from top to bottom
Extraordinary methods of construction characterised by the raising of hingedly-connected building elements, e.g. arches, portal frames
{the structure being a roof}
Definition statement
This subclass/group covers:

Method of construction whereby the walls are added under the raised roof, e.g. in order to enable work in dry conditions

Informative references
Attention is drawn to the following places, which may be of interest for search:
Enlarging an existing structure
{characterised by the raising of hingedly-connected building elements, e.g. arches, portal frames (E04B 1/355 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Extraordinary methods of construction characterised by the tilting-up of whole buildings or sections thereof, e.g. walls, portal frames
Informative references
Attention is drawn to the following places, which may be of interest for search:
Structures with hinged parts
{characterised by the use of a central column to lift and temporarily or permanently support structural elements (E04B 1/3516 and E04B 1/355 take precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Extraordinary methods of construction characterised by erecting a vertical structure and then adding the floors from top to bottom
Extraordinary methods of construction characterised by the tilting-up of whole buildings or sections thereof, e.g. walls, portal frames
Informative references
Attention is drawn to the following places, which may be of interest for search:
Small buildings mainly supported by a central column or footing
Bearings or like supports allowing movement (for bridges E01D 19/04; buildings with-standing earthquakes E04H 9/02)
Definition statement
This subclass/group covers:

Bearings allowing movement of the supported structure due to exterior influences, but also allowing movement for the purpose of adjusting horizontal or angular position of the supported structure.

References relevant to classification in this group
This subclass/group does not cover:
Bearings for bridges
Buildings withstanding earthquakes
Informative references
Attention is drawn to the following places, which may be of interest for search:
Rubber bearings
Connections for building structures in general
Special rules of classification within this group

Documents should only exceptionally be classified in E04B 1/38, connections for general applications should be classified in subclass F16B.

Separate connecting elements (for forms, falsework, or shutterings E04G 17/00; releasable clips or clamps, hooks, wedges, wall-dowels, nails, bolts, rivets, screws, wood-screws F16B)
References relevant to classification in this group
This subclass/group does not cover:
Connecting elements for forms, falsework, or shutterings
Releasable clips or clamps, hooks, wedges, wall-dowels, nails, bolts, rivets, screws, wood-screws
Special rules of classification within this group

Documents should only exceptionally be classified in E04B 1/40, connections for general applications should be classified in subclass F16B.

Connecting devices specially adapted for embedding in concrete ( { joist hangers E04B 1/2612; shear dowels E04B 1/483} ; spacers { other than masonry wall ties} for cavity walls E04B 2/30, E04B 2/44; connectors for reinforcing elements E04C 5/16; supporting devices for connector reinforcing rods for concrete walls E04G 21/125; fastening frames to the border of openings E06B 1/56)
References relevant to classification in this group
This subclass/group does not cover:
Spacers between rows of masonry blocks
Joist hangers
Shear dowels for concrete parts
Spacers other than masonry wall ties for cavity walls
Connectors for reinforcing elements
Supporting devices for connector reinforcing rods for concrete walls
Fastening frames to the border of openings
Special rules of classification within this group

Use E04B 2001/4192 for classifying additional information of connecting devices which are attached to the concrete reinforcement members for the documents classified in E04B 1/41 to E04B 1/4178.

{Elements with sockets (E04B 1/4107 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Longitudinal elements having an open profile, with the opening parallel to the concrete or masonry surface, i.e. anchoring rails
{with transverse hook- or loop-receiving parts (E04B 1/415 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Elements with captive and extendable anchoring parts, e.g. spring-loaded bolts, hanging rings
{Nailable or non-threaded screwable elements (dowels F16B 13/00) }
References relevant to classification in this group
This subclass/group does not cover:
Dowels for holding a fastener
{Masonry wall ties (with insulation-layer locating devices E04B 1/7616; replacing or adding wall ties E04G 23/0222) }
Definition statement
This subclass/group covers:

Separate tie rods embedded in the horizontal or vertical masonry joints, for tying a masonry wall to a non-masonry support, e.g. a concrete wall or posts, or for making a T-junction between two masonry walls.

References relevant to classification in this group
This subclass/group does not cover:
Masonry blocs with integrated spacers or masonry walls with spacers not located in the masonry joints
Masonry wall ties with insulation-layer locating devices
Replacing or adding wall ties
Informative references
Attention is drawn to the following places, which may be of interest for search:
Walls of framework or pillar-work with a brick veneer facing
Special rules of classification within this group

Use E04B 2001/4192 for classifying additional information of connecting devices which are attached to the concrete reinforcement members.

Use E04B 1/7616 for classifying additional information of connecting devices which are combined with insulation-layer locating devices.

{for cavity walls with both wall leaves made of masonry (spacers for permanent forms E04B 2/86) }
Definition statement
This subclass/group covers:

Separate tie rods embedded in horizontal or vertical masonry joints, for tying two parallel masonry walls together.

References relevant to classification in this group
This subclass/group does not cover:
Spacers for permanent forms
Special rules of classification within this group

Use E04B 1/7616 for classifying additional information of connecting devices which are combined with insulation-layer locating devices.

{ Shear dowels for wood (E04B 1/49 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Shear dowels with self-penetrating parts
with self-penetrating parts, e.g. claw dowels { (nail plates F16B 15/0023) }
References relevant to classification in this group
This subclass/group does not cover:
Nail plates
Joints substantially without separate connecting elements, e.g. jointing by inter-engagement (welded, glued, or the like joints, in general F16B)
References relevant to classification in this group
This subclass/group does not cover:
Welded, glued, or the like joints, in general
of bar-shaped building elements { (framework connections E04B 1/21, E04B 1/2403, E04B 1/2604) }
Relationship between large subject matter areas

Joints with emphasis on the bar-shaped element, as opposed to F16B 7/00 where the emphasis is on the connector.

References relevant to classification in this group
This subclass/group does not cover:
Connections of large longitudinal structural elements
Informative references
Attention is drawn to the following places, which may be of interest for search:
Connections of rods
Special rules of classification within this group

Use E04B 2001/5862 to E04B 2001/5893 for classifying additional information of the documents classified in E04B 1/58 to E04B 1/5818.

{with a closed cross-section}
Special rules of classification within this group

Use E04B 2001/5862 to E04B 2001/5893 and E04B 2001/5856 for classifying additional information of the documents of E04B 1/5825 to E04B 1/585.

of slab-shaped building elements with each other
Relationship between large subject matter areas

Joints with emphasis on the slab-shaped element, as opposed to F16B 7/00 where the emphasis is on the connector.

References relevant to classification in this group
This subclass/group does not cover:
Connections for furniture
Connections of sheet metal panels
Connections for structural concrete panels
Informative references
Attention is drawn to the following places, which may be of interest for search:
Joining sheets or plates
Special rules of classification within this group

Use E04B 2001/6195 as additional information to classify slabs connected at an angle for documents classified in E04B 1/61 to E04B 1/6187 and E04B 2001/6191.

{with rotatable locking means co-operating with a recess (similar devices for sliding doors E05B 65/0817) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Rotating connectors
Locks for sliding doors with bolt pivoting about an axis perpendicular to the wings
Insulation or other protection; Elements or use of specified material therefor (chemical compositions C01 to C11; implements for applying insulation or sealings E04F 21/00; buildings to withstand or to provide protection against external undesired influences E04H 9/00; sealing pipes in walls or partitions F16L 5/02; shielding against dangerous radiation G21F; constructions of particular parts of buildings, see the relevant groups for those parts)
Definition statement
This subclass/group covers:

Insulation or other protection for buildings in general; Elements or use of specified material for insulation of buildings or other protection of buildings.

References relevant to classification in this group
This subclass/group does not cover:
Insulation of partition walls
Insulation of floor structures
Insulation of roofs
Insulation of suspended ceilings
Insulation of floorings, e.g. floating floors
Chemical compositions
C01 to C11
Implements for applying insulation or sealings
Buildings to withstand or to provide protection against external undesired influences
Sealing pipes in walls or partitions
Shielding against dangerous radiation
for making damp-proof; Protection against corrosion (sealings E04B 1/66)
References relevant to classification in this group
This subclass/group does not cover:
Sealings
{Protecting metallic construction elements against corrosion (for concrete reinforcing elements made of steel E04C 5/01; anodic or cathodic protection C23F 13/00) }
References relevant to classification in this group
This subclass/group does not cover:
Protection of concrete reinforcing elements made of steel
Anodic or cathodic protection
{Damp-proof courses (in combination with lintels E04C 3/02) }
Definition statement
This subclass/group covers:

Damp-proof courses installed during construction of the structure, also retro-fitted e.g. by driving plates in masonry joints.

References relevant to classification in this group
This subclass/group does not cover:
Damp-proof courses in combination with lintels
Informative references
Attention is drawn to the following places, which may be of interest for search:
Sealing membranes, sealing coatings
{obtained by removal and replacement of a horizontal layer of an existing wall}
Definition statement
This subclass/group covers:

Damp-proof courses made of a plate, sheet, or hardening composition, e.g. mortar.

{obtained by injection or infiltration of water-proofing agents into an existing wall}
Special rules of classification within this group

Documents with details of the composition and manufacture of water-proofing agents should be additionally classified in the relevant classes for these compositions, e.g. C08L for bituminous compositions

Sealings ( {damp-proof courses E04B 1/644; fire-proof sealings E04B 1/948} ; additions of anti-leak properties to plaster C04B; bituminous sealing masses C08L 95/00; sealings for hydraulic engineering work in general E02B 3/16; against ground humidity or ground water E02D 31/02; coverings against rain or other precipitations of the atmosphere E04D; composition of material or manufacture of sealing foils, see the relevant classes for these foils)
Definition statement
This subclass/group covers:

Sealing membranes or coatings for buildings in general.

References relevant to classification in this group
This subclass/group does not cover:
Composition of material
Manufacture of sealing foils
Water-proofing of tunnels
Roofing membranes
Repairing sealings
Sealing where pipes, cables pass through walls or partitions
Damp-proof courses
Fire-proof sealings
Additions of anti-leak properties to plaster
Bituminous sealing masses
Sealings for hydraulic engineering work in general
Sealings against ground humidity or ground water
Roof coverings against rain or other precipitations of the atmosphere
Informative references
Attention is drawn to the following places, which may be of interest for search:
Repairs, e.g. by sealing impregnation
Sealing in water management
Special rules of classification within this group

Documents with details of the composition or manufacture of sealing agents should be additionally classified in the relevant classes for these compositions.

of joints, e.g. expansion joints (packing for joints in roads or airfields E01C 11/02; expansion joints for bridges E01D 19/06; sealing joints between foundation piles E02D 5/14; joints in foundation structures E02D 29/16; devices for sealing the spaces or joints between roof-covering elements E04D 1/36; sealing joints between roof-covering elements E04D 3/38; {construction of joints for flooring or floor layers composed of a number of similar elements E04F 15/02005} ; construction of joints for flooring or floor layers made of masses in situ E04F 15/14)
References relevant to classification in this group
This subclass/group does not cover:
Repairing sealings of joints
Tools for inserting or removing sealing strips
Machines for inserting or removing sealing strips
Packing for joints in roads or airfields
Expansion joints for bridges
Sealing joints between foundation piles
Joints in foundation structures
Devices for sealing the spaces or joints between roof-covering elements
Sealing joints between roof-covering elements
Construction of joints for flooring or floor layers composed of a number of similar elements
Construction of joints for flooring or floor layers made of masses in situ
Informative references
Attention is drawn to the following places, which may be of interest for search:
Sealing of joints in water management
Sealing in mechanical engineering
Special rules of classification within this group

Use E04B 2001/6818 for documents classified in E04B 1/68 to E04B 1/6816 for classifying additional information of joints comprising swellable parts.

{Fillings therefor}
Definition statement
This subclass/group covers:

Joints using a putty-like filler, with or without backing strip.

{Joint covers (E04B 1/6815 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Expansion elements specially adapted for wall or ceiling parts
{Waterstops (E04B 1/6807 takes precedence) }
Definition statement
This subclass/group covers:

Sealing strips embedded in two succesively poured concrete structures.

References relevant to classification in this group
This subclass/group does not cover:
Expansion elements for parts cast in situ
{Expansion elements for parts cast in situ}
Definition statement
This subclass/group covers:

Waterstops with a central deformable section, e.g. hollow or folded.

{Compressable seals of hollow form (E04B 1/6816 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Porous tubular seals for injecting sealing material
{Expansion elements specially adapted for wall or ceiling parts}
References relevant to classification in this group
This subclass/group does not cover:
Finishing strips for the junction of a wall and a ceiling
{Porous tubular seals for injecting sealing material (filling of cracks in existing buildings E04G 23/02) }
References relevant to classification in this group
This subclass/group does not cover:
Filling of cracks in existing buildings
Drying or keeping dry, e.g. by air vents ( {using damp-proof courses E04B 1/644; using sealings, e.g. sealing masses or foils, E04B 1/66} ; during erection E04G 21/28)
References relevant to classification in this group
This subclass/group does not cover:
Caps for the protection of the ends of wooden beams against humidity
Repairing sealings
Drying or keeping dry using damp-proof courses
Drying or keeping dry using sealings, e.g. sealing masses or foils
Drying or keeping dry during erection
{ by using electricity, e.g. electro-osmosis (electrochemical desalination or re-alkalisation of reinforced concrete C04B 41/00) }
Definition statement
This subclass/group covers:

Drying or keeping dry by the use of electricity, e.g. electro-osmosis, electrical heating of a wall or a room, electrical ventilation.

References relevant to classification in this group
This subclass/group does not cover:
Electrochemical desalination or re-alkalisation of reinforced concrete
Informative references
Attention is drawn to the following places, which may be of interest for search:
Removing salts from walls
{by heating the ambient air}
Definition statement
This subclass/group covers:

Drying by heating the ambient air, e.g. using a burner.

Informative references
Attention is drawn to the following places, which may be of interest for search:
{by collecting water in basements}
References relevant to classification in this group
This subclass/group does not cover:
Drainage around foundations
Informative references
Attention is drawn to the following places, which may be of interest for search:
{by ventilating (means for ventilating in floors E04B 5/48, in ceilings E04B 9/02, in building blocks E04C 1/392, in building panels E04C 2/521, in roofs E04D 13/16; ventilating wall coverings E04F 13/007) }
References relevant to classification in this group
This subclass/group does not cover:
Means for ventilating in floors
Means for ventilating in ceilings
Means for ventilating in building blocks
Means for ventilating in building panels
Means for ventilating in roofs
Ventilating wall coverings
Informative references
Attention is drawn to the following places, which may be of interest for search:
Air-ducts or air channels
Electrical ventilation for drying rooms
{Air vents for walls}
Definition statement
This subclass/group covers:

Connections of the interior of the building or the interior of the wall with the exterior of the building; Air vents for crawl spaces.

References relevant to classification in this group
This subclass/group does not cover:
Pest control by keeping dry
Impregnation of wood or like materials
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for catching or killing insects
Special rules of classification within this group

Documents with air vents for walls in combination with other aspects of ventilation are classified in E04B 1/7069.

Pest control , E04B 1/72.

Heat, sound or noise insulation, absorption, or reflection (forms of, or arrangements in, rooms for influencing or directing sound E04B 1/99) . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls (fire protection E04B 1/94; elements chiefly adapted for structural purposes E04C 1/00 to E04C 3/00; chiefly adapted for surface covering E04F 13/00; as underlayers for floor coverings E04F 15/18; closures for wall or like openings E06B)
References relevant to classification in this group
This subclass/group does not cover:
Forms of, or arrangements in, rooms for influencing or directing sound
Fire protection
Elements chiefly adapted for structural purposes
Elements; chiefly adapted for surface covering
Elements chiefly adapted as underlayers for floor coverings
Closures for wall or like openings
Informative references
Attention is drawn to the following places, which may be of interest for search:
Thermal insulation in general
Noise damping in general
Use of solar heat
Heat storage using latent heat
Special rules of classification within this group

Heat insulation of the whole building enveloppe and active heat insulation, e.g. walls with ventilation conduits for insulation purpose, are classified in E04B 1/74.

specifically with respect to heat only (heat insulation in general F16L 59/00)
References relevant to classification in this group
This subclass/group does not cover:
Insulating elements of car bodies
Heat insulation in general
Special rules of classification within this group

Use E04B 2001/741 to E04B 2001/7695 for classifying additional information of the documents classified in E04B 1/76 to E04B 1/806 and E04B 1/88, E04B 1/90

{fillings for cavity walls}
References relevant to classification in this group
This subclass/group does not cover:
Implements or machines for applying insulating material
{with insulation-layer locating devices combined with wall ties}
Special rules of classification within this group

Also classify in E04B 1/4178 or E04B 1/4185 when combined with masonry wall ties.

{ Exterior insulation of exterior walls}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Bases for plaster
{ Dowels with enlarged insulation retaining head}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Fastening of an exterior insulation on a roof using screws or nails
{ Anchoring of separate elements through the lining to the wall}
References relevant to classification in this group
This subclass/group does not cover:
Hinges or other suspension devices for doors, windows or wings
{comprising an insulating layer, disposed between two longitudinal supporting elements, e.g. to insulate ceilings}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Insulating material disposed between the purlins or rafters of a roof
{comprising fiber blankets or batts}
References relevant to classification in this group
This subclass/group does not cover:
Manufacturing of inorganic fiber blankets or batts
Special rules of classification within this group

Documents concerning fiber blankets or batts mentioning heat and sound insulation but without giving characteristics specific to sound insulation are classified in E04B 1/7662 to E04B 1/767.

Heat insulating elements {E04B 1/7662 takes precedence}
References relevant to classification in this group
This subclass/group does not cover:
Heat insulating fiber blankets or batts
slab-shaped
Informative references
Attention is drawn to the following places, which may be of interest for search:
Nailable or screwable inserts for foam panels
{with vacuum spaces included in the slab}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Thermal insulation in general, using vacuum
Cold rooms, refrigerators using vacuum insulation
specifically with respect to sound only ( {of floors or ceilings E04B 9/001; of flooring E04F 15/20} ; noise damping in ducts or channels E04F 17/00; {sound damping devices for pipes F16L 55/033} ; noise damping in general G10K 11/00)
Definition statement
This subclass/group covers:

Sound insulation for buildings in general and for structural walls.

References relevant to classification in this group
This subclass/group does not cover:
Sound insulation of suspended or false ceilings
Sound insulation of flooring
Partition walls with special measures for sound insulation
Noise damping in ducts or channels
Sound damping devices for pipes
Noise damping in general
Insulating elements of car bodies
Special rules of classification within this group

Use E04B 2001/741 to E04B 2001/748 and E04B 2001/8245 to E04B 2001/8495 for classifying additional information of the documents classified in E04B 1/82 to E04B 1/90.

{sound absorbing devices (E04B 1/8218, E04B 1/8227 take precedence) }
Definition statement
This subclass/group covers:

Passive noise absorbtion body located in a room for absorbing the noise generated in the room.

References relevant to classification in this group
This subclass/group does not cover:
Ceiling with acoustic baffles
Soundproof enclosures
Screens; Arrangements of sound-absorbing elements, e.g. baffles
{soundproof enclosures}
Definition statement
This subclass/group covers:

Enclosures keeping the noise out or in.

{screens (E04B 2/74 takes precedence; for road or railway traffic E01F) ; Arrangements of sound-absorbing elements, e.g. baffles}
References relevant to classification in this group
This subclass/group does not cover:
Partition walls
Ceiling with acoustic baffles
Screens for road or railway traffic
Sound-absorbing elements
Definition statement
This subclass/group covers:

Structural elements, specifically for sound absorbtion.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Structural building elements in general
{block-shaped}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Block-shaped building elements in general
{sheet-shaped}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Sheet-shaped building elements in general
slab-shaped
Informative references
Attention is drawn to the following places, which may be of interest for search:
Panel or slab-shaped building elements in general
Insulating elements for both heat and sound
Informative references
Attention is drawn to the following places, which may be of interest for search:
Structural building elements in general
Special rules of classification within this group

Documents concerning fiber blankets or batts mentioning heat and sound insulation but without giving characteristics specific to sound insulation are classified in E04B 1/7662 to E04B 1/767

slab-shaped
Informative references
Attention is drawn to the following places, which may be of interest for search:
Panel or slab-shaped building elements in general
Protection against other undesired influences or dangers (buildings providing protection against external dangers E04H 9/00; shielding against dangerous radiation G21F)
Definition statement
This subclass/group covers:

Protection against other undesired influences or dangers for buildings in general, e.g. fire or vibrations and shocks originating from inside the building or due to wind or traffic, e.g. using mass damping systems.

References relevant to classification in this group
This subclass/group does not cover:
Screening of rooms against electric or magnetic fields
Protection of foundations against entry of noxious gases, e.g. radon
Buildings providing protection against external dangers, e.g. earthquake- or hurricane-proof buildings
Shielding against dangerous radiation
Special rules of classification within this group

Use E04B 2001/925 for classifying additional information of the documents classified in E04B 1/92.

against fire ( {fire protection of partitions E04B 2/7403, E04B 2/7409; supporting constructions for ceilings having the capability of expansion in case of fire E04B 9/08} ; fire-fighting A62C, {e.g. fire prevention or containment A62C 2/00} ; impregnation of wood or similar materials B27K; {fireproof paints C09D 5/18; fireproofing materials C09K 21/00; flame-resistant papers D21H 5/0002; coverings or linings, e.g. for walls or ceilings, in general E04F 13/00} ; fireproof doors E06B 5/16; {firebreak devices for pipes or the like passing through walls F16L 5/04; protection of pipes by means of non-inflammable material F16L 57/04} )
References relevant to classification in this group
This subclass/group does not cover:
Permanently installed fire-fighting equipment
Fire prevention or containment
Firebreaks for passages of pipes, cables or protective tubing through walls or partitions
Fire protection of partitions
Supporting constructions for ceilings having the capability of expansion in case of fire
Fire-fighting
Fire prevention or containment
Impregnation of wood or similar materials
Fireproof paints
Fireproofing materials
Flame-resistant papers
Coverings or linings, e.g. for walls or ceilings, in general
Fireproof doors
Firebreak devices for pipes or the like passing through walls
Protection of pipes by means of non-inflammable material
Special rules of classification within this group

Documents with details of the composition of fireproofing compounds should also be classified in the relevant classes for these compositions;

Use E04B 2001/949 for classifying additional information of the documents classified in E04B 1/94 to E04B 1/945 .

{Building elements specially adapted therefor}
Special rules of classification within this group

Fusible suspension supports are classified in E04B 1/941.

{slab-shaped}
Special rules of classification within this group

Documents with details of the composition should be classified also in E04B 1/94 and should receive classes for the compositions per se;

Details of fire-proof sealing of the connection of panels should additionally be classified in E04B 1/948.

{covered with fire-proofing material}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Beam coverings
{by closing openings in walls or the like in the case of fire (fire-proof doors E06B 5/16) }
References relevant to classification in this group
This subclass/group does not cover:
Fire-proof doors
{Fire-proof sealings or joints (for doors or windows E06B 5/164) }
References relevant to classification in this group
This subclass/group does not cover:
Fire-proof sealings or joints for doors or windows
against vibrations or shocks (on foundations E02D 31/08) ; against mechanical destruction, e.g. by air-raids (against incendiary damage only E04B 1/94; finishing work therefor E04F; buildings withstanding earth-quake or the like, shelters, arrangements of splintercatching walls E04H 9/00)
Definition statement
This subclass/group covers:

Protection of buildings against vibrations or shocks originating from inside the building, e.g. an explosion within the building, or are caused by the wind or nearby construction works or traffic.

References relevant to classification in this group
This subclass/group does not cover:
Buildings adapted to withstand tornadoes
Protection against vibrations or shocks on foundations
Protection against incendiary damage only
Finishing work for protection against vibration, shocks, or mechanical damge
Buildings withstanding earth-quake or the like, shelters, arrangements of splintercatching walls
Buildings against air-raids or other war-like actions
Informative references
Attention is drawn to the following places, which may be of interest for search:
Pressure relieve panels in case of over-pressure
{involving active or passive dynamic mass damping systems}
Definition statement
This subclass/group covers:

Protection of buildings by reducing the movement of buildings, caused e.g. by wind or earthquakes, using mass-spring system, or systems where the masse is actively moved in opposite phase to the building movement, or tanks with liquid mass, with or without baffles for impeding liquid movement.

Room acoustics, i.e. forms of, or arrangements in, rooms for influencing or directing sound (E04B 1/82 takes precedence; acoustics in general G10K 11/00; electric signal processing for producing a reverberation or echo sound G10K 15/08)
Definition statement
This subclass/group covers:

Arrangments for adjusting the acoustics of e.g. a concert hall

References relevant to classification in this group
This subclass/group does not cover:
Insulation specifically with respect to sound only
Acoustics in general
Electric signal processing for producing a reverberation or echo sound
Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls (connections for building structures in general E04B 1/38; insulation for buildings in general E04B 1/62; building elements of relatively thin form for parts of buildings E04C 2/00)
Definition statement
This subclass/group covers:

Load-bearing and non-load-bearing walls for buildings, wall construction with regard to insulation, and connections specially adapted to walls for buildings.

References relevant to classification in this group
This subclass/group does not cover:
Connections for building structures in general
Insulation for buildings in general
Building panels
Retaining walls
Special rules of classification within this group

Load-bearing walls made from panels are classified in E04B 1/02 to E04B 1/14.

Load-bearing or non-load-bearing walls built-up from layers of building elements, e.g. brick or block walls, are classified in E04B 2/02 to E04B 2/54.

Load-bearing walls having a framework or a pillarwork, and walls incorporating load-bearing elongated members, are classified in E04B 2/56 to E04B 2/709.

Non-load-bearing walls made of panels or posts and panels are classified in E04B 2/72 to E04B 2/828.

Load-bearing or non-load-bearing walls made by casting, pouring or tamping in situ are classified in E04B 2/84 to E04B 2/8664.

built-up from layers of building elements
Definition statement
This subclass/group covers:

Walls for buildings built-up from layers of building elements, e.g. brick or block walls, as well as building elements of block or brick shape for the construction of parts of buildings. The walls can be bearing walls or non-bearing walls, e.g. partition walls, and the building elements accordingly.

References relevant to classification in this group
This subclass/group does not cover:
Toys building blocks
Positioning wedges
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of connections of block or brick shaped building elements
Special features of block or brick shaped building elements
Retaining walls
Masonry wall ties, i.e. anchors
Details of connections
Special rules of classification within this group

Building elements of block or brick shape, for the construction of parts of buildings, are classified in E04B 2/02 to E04B 2/54, even if they do not explicitly form part of a wall.

Building elements of block or brick shape, for the construction of parts of buildings, and characterised by special adaptations, e.g. serving for locating conduits, for forming soffits, cornices or shelves, for fixing wall-plates or door-frames, for claustra, are classified in E04C 1/39 to E04C 1/397.

Building elements of block or brick shape, for the construction of parts of buildings, and being built-up from parts of different materials are classified in E04C 1/40 to E04C 1/41.

Building elements of glass or other transparent material, for the construction of parts of buildings, are classified in E04C 1/42.

All aspects of the block or brick shaped building elements, e.g. special features, and details of connections among themselves, should be classified in E04B 2/02 to E04B 2002/0297.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Block shape
block shape is not restricted to parallelepiped shape
Walls having neither cavities between, nor in, the solid elements
Definition statement
This subclass/group covers:

Walls having neither cavities between, nor in, the solid building elements, as well as solid brick or block shape building elements having no cavities in them.

by filling material with or without reinforcements in small channels in, or in grooves between, the elements
Definition statement
This subclass/group covers:

Walls built-up from layers of solid building elements of brick or block shape, and having no cavities in the elements, wherein the joints, e.g. small channels or grooves between the building elements and/or between the successive layers are filled with material, with or without additional reinforcements in the joints, small channels or grooves.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Separate spacers between building elements
Reinforcing elements of low bending resistance
Light-weight girders
Reinforcing elements of material other than metal
Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element
Definition statement
This subclass/group covers:

Walls built-up from layers of building elements of brick or block shape having cavities in, but not between, the building elements, as well as brick or block shape building elements having cavities in them.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Building elements of block shape, serving for ventilating, heating, cooling, and for locating conduits
Building elements of brick or block shape with holes filled with insulating material
by filling material with or without reinforcements in small channels in, or in grooves between, the elements
Definition statement
This subclass/group covers:

Walls built-up from layers of building elements of brick or block shape, and having cavities in the elements, wherein the joints, e.g. small channels or grooves between the building elements and/or between the successive layers are filled with material, with or without additional reinforcements in the joints, small channels or grooves.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Separate spacers between building elements
Reinforcing elements of low bending resistance
Light-weight girders
Reinforcing elements of material other than metal
the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
Informative references
Attention is drawn to the following places, which may be of interest for search:
Load-bearing walls of framework or pillarwork
the walls being characterised by fillings in all cavities in order to form a wall construction
Informative references
Attention is drawn to the following places, which may be of interest for search:
Walls made by casting, pouring, or tamping in situ, e.g. in permanent forms, but not by filling cavities in brick or block elements exclusively
Walls having cavities between, but not in, the elements; Walls of elements each consisting of two or more parts kept in distance by means of spacers, all parts being solid
Definition statement
This subclass/group covers:

Walls made from layers of building elements of brick or block shape, the walls having cavities between, but not in, the elements, e.g. walls made of solid building elements having special profiles on their small side faces in order to create a cavity when connected with the adjacent elements;

Walls made from layers of building elements of brick or block shape, each consisting of two or more parts kept in distance, in a direction perpendicular to the wall, by means of spacers, all parts of the elements being solid.

using elements having specially designed means for stabilising the position; Spacers for cavity walls { (masonry wall ties E04B 1/4178) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of connections
Masonry wall ties, i.e. anchors
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Spacers for cavity walls
spacers between solid parts of brick or block shaped elements for building cavity walls, e.g. spacers integrated in a block consisting of two parallel solid slab shaped parts kept at a distance by the spacer
by filling material with or without reinforcements in small channels in, or in grooves between, the elements
Definition statement
This subclass/group covers:

Walls made from layers of building elements of brick or block shape, the walls having cavities between, but not in, the elements, wherein the joints, e.g. small channels or grooves between the building elements and/or between the successive layers are filled with material, with or without additional reinforcements in the joints, small channels or grooves.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Separate spacers between building elements
Reinforcing elements of low bending resistance
Light-weight girders
Reinforcing elements of material other than metal
the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
Informative references
Attention is drawn to the following places, which may be of interest for search:
Load-bearing walls of framework or pillarwork
the walls being characterised by fillings in all cavities in order to form a wall construction
Informative references
Attention is drawn to the following places, which may be of interest for search:
Walls made by casting, pouring, or tamping in situ, e.g. in permanent forms, but not by filling cavities in brick or block elements exclusively
Walls having cavities between, as well as in, the elements; Walls of elements each consisting of two or more parts, kept in distance by means of spacers, at least one of the parts having cavities
Definition statement
This subclass/group covers:

Walls made from layers of building elements of brick or block shape, the walls having cavities between, as well as in the elements, e.g. walls made of building elements having cavities and having special profiles on their small side faces in order to create a cavity when connected with the adjacent elements;

Walls made from layers of building elements of brick or block shape, each consisting of two or more parts kept in distance, in a direction perpendicular to the wall, by means of spacers, at least one of the parts of the elements having cavities.

using elements having specially-designed means for stabilising the position; Spacers for cavity walls { (masonry wall ties E04B 1/4178) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of connections
Masonry wall ties, i.e. anchors
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Spacers for cavity walls
spacers between parts of brick or block shaped elements for building cavity walls, at least one of the parts having cavities, e.g. spacers integrated in a block consisting of two parallel, non-massive, slab shaped parts kept at a distance by the spacer
by filling material with or without reinforcements in small channels in, or in grooves between, the elements
Definition statement
This subclass/group covers:

Walls made from layers of building elements of brick or block shape, the walls having cavities between, as well as in the elements, wherein the joints, e.g. small channels or grooves between the building elements and/or between the successive layers are filled with material, with or without additional reinforcements in the joints, small channels or grooves.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Separate spacers between building elements
Reinforcing elements of low bending resistance
Light-weight girders
Reinforcing elements of material other than metal
the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
Informative references
Attention is drawn to the following places, which may be of interest for search:
Load-bearing walls of framework or pillarwork
the walls being characterised by fillings in all cavities in order to form a wall construction
Informative references
Attention is drawn to the following places, which may be of interest for search:
Walls made by casting, pouring, or tamping in situ, e.g. in permanent forms, but not by filling cavities in brick or block elements exclusively
{Load-bearing} walls of framework or pillarwork; Walls incorporating load-bearing elongated members (E04B 2/74, E04B 2/88 take precedence; pillars E04C 3/30)
References relevant to classification in this subclass/group
This subclass/group does not cover:
Removable non-load-bearing partitions; Partitions with a free upper edge
Curtain walls
Pillars
{with fillings between the load-bearing elongated members}
Definition statement
This subclass/group covers:

Nogging of half-timbered walls.

the members being formed of two or more elements in side-by-side relationship
Informative references
Attention is drawn to the following places, which may be of interest for search:
Framework with metallic elongated load-supporting parts formed of a number of parallel profiles
made by filling-up wall cavities (E04B 2/24, E04B 2/38, E04B 2/52 take precedence)
References relevant to classification in this group
This subclass/group does not cover:
Walls having cavities in, but not between, the elements, the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
Walls having cavities between, but not in, the elements, the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
Walls having cavities between, as well as in, the elements, the walls being characterised by fillings in some of the cavities forming load-bearing pillars or beams
{with integrated supporting and obturation function}
Definition statement
This subclass/group covers:

Walls made from horizontally laid logs or beams, e.g. log cabins.

{with longitudinal horizontal elements (E04B 2/704, E04B 2/705 take precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Walls incorporating load-bearing elongated members of wood, with longitudinal horizontal elements shorter than the length of a wall
Walls incorporating load-bearing elongated members of wood, with longitudinal horizontal elements placed between columns
{with supporting function}
Definition statement
This subclass/group covers:

Walls comprising structural wooden studs or posts with non structural closure elements en-between, e.g. structural stud walls and shear bracing therefor.

References relevant to classification in this group
This subclass/group does not cover:
Half-timbering
{Non-load-bearing} walls of elements of relatively thin form {with respect to the thickness of the wall} (E04B 2/56, E04B 2/74, E04B 2/88 take precedence; with joint fillings acting as framework or pillars E04B 2/68; elements E04C 2/00)
Definition statement
This subclass/group covers:

Non-load-bearing thin walls without studs or posts, with profiled or folded panels or trays.

References relevant to classification in this subclass/group
This subclass/group does not cover:
Non-structural stud walls
Load-bearing] walls of framework or pillarwork; Walls incorporating load-bearing elongated members
Removable non-load-bearing partitions; Partitions with a free upper edge
Curtain walls
Non-load-bearing walls of elements of relatively thin form with joint fillings acting as framework or pillars
Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
Special rules of classification within this group

Use E04B 2002/725 to E04B 2002/728 as additional information for the documents of E04B 2/72.

{constituted of gypsum elements}
Definition statement
This subclass/group covers:

Non-load-bearing thin walls with folded plasterboard or gypsum or plaster projected onto a lattice.

Special rules of classification within this group

Use E04B 2/845 as additional information for the documents of E04B 2/723.

Removable non-load-bearing partitions; Partitions with a free upper edge (framed panelsE04C 2/38) {modular coordination}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Framed panels
Screens, e.g. for an auscultation room
Electric wiring
Special rules of classification within this group

Documents with tables, shelving and similar items associated with a partition wall should be circulated be additionally be classified in furniture classes, e.g. A47B for tables or desks.

{assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts (E04B 2/78 and E04B 2/80 take precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Removable non-load-bearing partitions or partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame-members
Removable non-load-bearing partitions or partitions with a free upper edge with framework or posts of wood
Special rules of classification within this group

Use E04B 2/7409 to E04B 2002/7498 as additional information for the documents of E04B 2/7407 to E04B 2/7459.

{Details of connection of panels (E04B 2/7427 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Partitions with a free upper edge with separate framed panels without intermediary support posts and with adjustable angular connection of panels
{Glazing details}
Special rules of classification within this group

Use E04B 2/7437 to E04B 2/7444 as additional information for the documents of E04B 2/7435.

{with panels hooked onto posts (E04B 2/7438 takes precedence) }
Definition statement
This subclass/group covers:

Non-load-bearing partition with free upper edge and panels hooked onto posts, e.g. with additional securing elements to prevent its unhooking.

References relevant to classification in this group
This subclass/group does not cover:
Partitions with a free upper edge with panels with support posts and with adjustable angular connection of panels to posts
E04B2/74E3
{hinged connections (E04B 2/7444 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Partitions with a free upper edge with panels with support posts and with panels hooked onto the rim or in a groove of circular posts
E04B2/74E3C
{Glazing details}
Special rules of classification within this group

Use E04B 2/7451 as additional information for the documents of E04B 2/745.

{Glazing details}
Special rules of classification within this group

Use E04B 2/7457 to E04B 2/7459 as additional information for the documents of E04B 2/7455.

{ with wallboards attached to the outer faces of the posts, parallel to the partition (E04B 2/7459 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Removable non-load-bearing partitions with panels and support posts, extending from floor to ceiling, the posts being telescoping to compensate for floor or ceiling irregularities
with framework or posts of metal { (details of connections, thresholds or skirtings E04B 2/82) }
Definition statement
This subclass/group covers:

Connections of horizontal and vertical metallic frame members.

References relevant to classification in this group
This subclass/group does not cover:
Details of connections, thresholds or skirtings
Informative references
Attention is drawn to the following places, which may be of interest for search:
Mitre joints for windows, doors
characterised by special cross-section of the frame-members {as far as important for securing wall panels to a framework with or without the help of cover-strips (separate connecting means, e.g. clipE04B 2/74; connections between uprights and cross-membersE04B 2/76) }
References relevant to classification in this group
This subclass/group does not cover:
Separate connecting means, e.g. clip
Connections between uprights and cross-members
characterised by the manner in which edges are connected to the building; Means therefor; Special details of easily-removable partitions {as far as related to the connection with other parts of the building}
References relevant to classification in this group
This subclass/group does not cover:
Means for connecting partition walls or panels to the ceilings
{ the connection between the floor and the ceiling being achieved without any restraining forces acting in the plane of the partition}
References relevant to classification in this group
This subclass/group does not cover:
Removable non-load-bearing partitions with panels and support posts, extending from floor to ceiling, the posts being telescoping to compensate for floor or ceiling irregularities
Connections between wall studs and upper or lower locating rails allowing vertical movement of upper rail with respect to the stud, e.g. by using slots in the rail or stud
{Partitions constituted of sliding panels}
Definition statement
This subclass/group covers:

Non-load-bearing partitions constituted of sliding panels, where the sliding occurs in a direction parallel or perpendicular to the plane of the partition

Informative references
Attention is drawn to the following places, which may be of interest for search:
Suspension arrangements for sliding wings of doors
Walls made by casting, pouring, or tamping in situ (E04B 2/02, E04B 2/56 take precedence; forms therefor E04G 11/06; working of concrete or similar masses able to be cast or poured in situ E04G 21/02)
References relevant to classification in this group
This subclass/group does not cover:
Walls built-up from layers of building elements
Load-bearing walls of framework or pillarwork ; Walls incorporating load-bearing elongated members
Reusable forms for walls made by casting, pouring, or tamping in situ
Working of concrete or similar masses able to be cast or poured in situ
Special rules of classification within this group

Documents where the filling does not contain a hardenable binder, e.g. rammed earth or loose rocks, are classified in E04B 2/84.

made in permanent forms
Special rules of classification within this group

Use E04B 2002/867 to E04B 2002/8694 as additional information for the documents of E04B 2/86 to E04B 2/8652.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:

A "tie" holds the two opposite leaves of the form together.

A "spacer" keeps the two opposite leaves at a predetermined distance from each other.

A single element can but must not have both functions: i.e. a tie can be a spacer or not, a spacer can be a tie or not.

{with ties attached to the inner faces of the forms (E04B 2/8611 and E04B 2/8623 take precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Walls made by casting, pouring, or tamping in situ in permanent forms with spacers being embedded in at least one form leaf
Walls made by casting, pouring, or tamping in situ in permanent forms with spacers and at least one form leaf being monolithic
{using dovetail-type connections}
Definition statement
This subclass/group covers:

Connections with dovetail or "T"-shaped grooves in the inner face of the form or the spacer

{with ties going through the forms}
Definition statement
This subclass/group covers:

Ties going through the form, e.g. nails or screws going through the forms into the spacers.

Curtain walls { (fixing of glass panes E06B 3/54) }
References relevant to classification in this group
This subclass/group does not cover:
Fixing of glass panes
Informative references
Attention is drawn to the following places, which may be of interest for search:
Measures for draining-off condensed water or water leaking in windows
Special rules of classification within this group

Curtain walls in combination with ventilation , heating, drainage, shading, adjustable supports are classified in E04B 2/88;

Drainage details should additionally be classified in E06B 7/14.

{comprising a supporting structure for flush mounted glazing panels}
References relevant to classification in this group
This subclass/group does not cover:
Connectors for fixing the flush mounted glazing to the supporting structure
comprising panels directly attached to the structure { (E04B 2/885 takes precedence) }
Definition statement
This subclass/group covers:

Panels directly attached to the structure, the panel comprising a frame or not

References relevant to classification in this group
This subclass/group does not cover:
Curtain walls comprising a supporting structure for flush mounted glazing panels
Concrete panels (E04B 2/92 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Curtain walls with sandwich-type panels
comprising panels attached to the structure through mullions or transoms { (E04B 2/885 takes precedence) }
Definition statement
This subclass/group covers:

Panels attached with panel clamping bars to the mullions or the transoms.

References relevant to classification in this group
This subclass/group does not cover:
Flush mounted glazing, the panels being attached without clamping bars to mullions or transoms
Glass roofs
Curtain walls comprising a supporting structure for flush mounted glazing panels
{Connections of mullions and transoms}
Special rules of classification within this group

Documents with details of connections of mullions to mullions, with details of connections of mullions or transoms to the supporting structure, or with details of the infill panels are classified in E04B 2/96, even if they show details of the connections of mullions and transoms.

Documents with details of angles or corners of the curtain walls are classified in E04B 2/962, even if they show details of the connections of mullions and transoms.

{Details of the cross-section of the mullions or transoms (E04B 2/965 takes precedence) }
Special rules of classification within this group

Are classified in E04B 2/967 documents which show only details of the cross-section of the mullions or transoms.

Documents with details of connections of mullions to mullions, of connections mullions or transoms, or with details of the infill panels, or with details of angles or corners of the curtain walls are classified in E04B 2/96,E04B 2/962 or E04B 2/965, even if they show details of the cross-section of the mullions or transoms.

Floors; Floor construction with regard to insulation; Connections specially adapted therefor (elements for floors, e.g. bricks, stones, filling bodies, girders, E04C; flooring as finishing work, insulation of flooring, sectional false floors, e.g. for computers E04F 15/00)
Definition statement
This subclass/group covers:

Structural floors for buildings; Building floors construction in general and with regard to insulation; Connections specially adapted to floors.

References relevant to classification in this group
This subclass/group does not cover:
Girders for floors
Flooring as finishing work, insulation of flooring, sectional false floors, e.g. for computers
Decks, e.g. garden decks
Flat foundations, floors resting on the ground
Disposable shutterings, forms for floors
Producing slab shaped elements of concrete in moulds
Decks for ships
Informative references
Attention is drawn to the following places, which may be of interest for search:
Building insulation in general; Heat and sound insulation for buildings
Connections for building structures in general
Buildings for parking cars
Load-carrying floor structures formed substantially of prefabricated units (E04B 5/43 to E04B 5/48 take precedence)
References relevant to classification in this group
This subclass/group does not cover:
Decks, e.g. garden decks
Sectional false floors
Informative references
Attention is drawn to the following places, which may be of interest for search:
Floor structures of extraordinary design
Special adaptation of floors for transmission of light
Special adaptation of floors for incorporating ducts
{ with beams or slabs of plastic}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Beams of plastics
with beams { or slabs} of concrete or other stone-like material, e.g. asbestos cement (E04B 5/08, E04B 5/14 take precedence)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Load carrying floor structures formed substantially of prefabricated units, with beams or girders laid in two directions
Load carrying floor structures formed substantially of prefabricated units, and assembled of block shaped elements
Special rules of classification within this group

Load-carrying floor structures consisting of prefabricated slabs of concrete or other stone like material are classified in E04B 5/04, except floor structures consisting of hollow core slabs which are classified in E04B 5/043.

{ having elongated hollow cores}
Definition statement
This subclass/group covers:

Load-carrying floor structures consisting of elongated hollow cores slabs, e.g. placed against one another.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Load-carrying floor structures partly cast in situ with prefabricated or partly prefabricated beams and one or more hollow cores between the beams
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Hollow core slab
Hollow core slab is a precast slab of prestressed concrete, having tubular voids extending the full length of the slab
{ with beams placed with distance from another}
Definition statement
This subclass/group covers:

Load-carrying floor structures formed of prefabricated beams placed with distance from one another, the space between the beams being filled or covered by prefabricated elements and eventually completed by non-structural layers of concrete or mortar..

References relevant to classification in this group
This subclass/group does not cover:
Load-carrying floor structures partly cast in situ with prefabricated stiffening ribs
Load carrying floor structures formed substantially of prefabricated units, and assembled of block shaped elements
{ with beams} placed against one another { optionally with pointing-mortar}
References relevant to classification in this group
This subclass/group does not cover:
Load-carrying floor structures consisting of elongated slabs placed against one another
Load-carrying floor structures consisting of elongated hollow cores slabs placed against one another
assembled of block-shaped elements, e.g. hollow stones (E04B 5/14 takes precedence; floors composed of reinforced brickwork E04B 5/44)
Definition statement
This subclass/group covers:

Load carrying floor structures assembled of prefabricated block-shaped elements, e.g. joined together by mortar, tensioning or connecting elements.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Load carrying floor structures formed substantially of prefabricated units, with beams or girders laid in two directions
Floors composed of reinforced brickwork
with metal beams or girders, e.g. with steel lattice girders (E04B 5/14 takes precedence)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Load carrying floor structures formed substantially of prefabricated units, with beams or girders laid in two directions
Metal beams or girders
Light-weight girders as reinforcing elements
with wooden beams (E04B 5/14 takes precedence) {also means for supporting beams; (shores or struts E04G 25/00) }
References relevant to classification in this group
This subclass/group does not cover:
Shores or struts
Informative references
Attention is drawn to the following places, which may be of interest for search:
Load carrying floor structures formed substantially of prefabricated units, with beams or girders laid in two directions
Wooden beams
Wooden joists hangers
Load-carrying floor structures wholly or partly cast or similarly formed in situ (E04B 5/43 to E04B 5/48 take precedence; floors merely characterised by the prefabricated elements E04C)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Floor structures of extraordinary design
Floors composed of stones, mortar and reinforcing elements
Special adaptation of floors for transmission of light
Special adaptation of floors for incorporating ducts
Forms or shutterings for making floors
Floor structures partly formed in situ
Definition statement
This subclass/group covers:

Floor structures partly formed in situ, i.e. in which at least some parts of the structure are prefabricated, e.g. precast girders or prefabricated filling members between the beams.

References relevant to classification in this group
This subclass/group does not cover:
Floor structures cast in situ with form units as part of the floor; with slab shaped form units acting as reinforcement
Floor structures cast in situ with hollow cylindrical or spherical filling elements
with stiffening ribs or other beam-like formations wholly cast between filling members
Definition statement
This subclass/group covers:

Floor structures partly formed in situ, with prefabricated filling members and with stiffening ribs wholly cast between or in the prefabricated filling members; Prefabricated filling elements suitable for casting stiffening ribs between or in them.

the filling members acting as self-supporting permanent forms (E04B 5/21 takes precedence)
Definition statement
This subclass/group covers:

Floor structures partly formed in situ, with prefabricated self-supporting filling members and with stiffening ribs wholly cast between or in the prefabricated self-supporting filling members, e.g. elongated self-supporting filling members resting on the walls.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Load-carrying floor structures consisting of slabs
Load-carrying floor structures consisting of hollow cores slabs
Load-carrying floor structures partly cast in situ with prefabricated or partly prefabricated beams and one or more hollow cores between the beams
Floor structures partly formed in situ, with prefabricated filling members and with stiffening ribs wholly cast between or in the prefabricated filling members, and extending in two different directions
Cross-ribbed floors
Definition statement
This subclass/group covers:

Floor structures partly formed in situ, with prefabricated filling members and with stiffening ribs wholly cast between or in the prefabricated filling members, and extending in two different and intersecting directions. Prefabricated filling elements suitable for casting cross-ribbed floors.

with stiffening ribs or other beam-like formations wholly or partly prefabricated (with all load-carrying parts substantially consisting of prefabricated units E04B 5/02) {beams built-up by elements joined in line E04C 3/22}
Definition statement
This subclass/group covers:

Floor structures partly formed in situ, with prefabricated or partly prefabricated beam-like formations, e.g. prefabricated beams of concrete, metal or wood.

References relevant to classification in this group
This subclass/group does not cover:
With all load-carrying parts substantially consisting of prefabricated units
Informative references
Attention is drawn to the following places, which may be of interest for search:
Provisions for connecting wooden stiffening ribs to the concrete slab
Beams built-up by elements joined in line
with filling members between the beams (E04B 5/28 takes precedence)
Definition statement
This subclass/group covers:

Floor structures partly formed in situ, with prefabricated or partly prefabricated beam-like formations and with prefabricated filling members between the beams;

Prefabricated elements for use as filling elements between prefabricated or partly prefabricated beams.

{ Monolithic filling members}
Definition statement
This subclass/group covers:

Floor structures partly formed in situ, with prefabricated or partly prefabricated beam-like formations and with prefabricated monolithic filling members between the beams;

Prefabricated monolithic elements for use as filling elements between prefabricated or partly prefabricated beams.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Monolithic
In one piece
{ with a flat lower surface (E04B 5/265 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Load-carrying floor structures partly cast in situ with prefabricated or partly prefabricated beams and one or more hollow cores between the beams
{ with one or more hollow cores}
Definition statement
This subclass/group covers:

Load-carrying floor structures partly cast in situ with prefabricated or partly prefabricated beams and one or more hollow cores between the beams

Informative references
Attention is drawn to the following places, which may be of interest for search:
Load-carrying floor structures consisting of hollow cores slabs only
Cross-ribbed floors
Definition statement
This subclass/group covers:

Floor structures partly formed in situ, with prefabricated or partly prefabricated beam-like formations and with prefabricated filling members between the beams;

Prefabricated elements for use as filling elements between prefabricated or partly prefabricated beams in a cross-ribbed floor.

the prefabricated parts of the beams consisting wholly of metal (E04B 5/28 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Beams, as independent entities, consisting of steel and concrete
Beams, as independent entities, consisting of concrete combined with a girder-like steel structure extending laterally outside the element
Informative references
Attention is drawn to the following places, which may be of interest for search:
Metal beams or girders
Light-weight metal girders used as reinforcement, e.g. with a precast concrete part
Floor structures wholly cast in situ with or without form units or reinforcements
Informative references
Attention is drawn to the following places, which may be of interest for search:
Forms or shutterings for making floors
Floor structures having permanent form for the floor edges
Means preventing cold bridging at the junction of external walls with a floor
Floor structures having peripheral anchors or supports
Special rules of classification within this group

Floor structures cast in situ with hollow cylindrical or spherical filling elements are classified in E04B 5/32.

Floor structures cast in situ with a metal form-slab are classified in E04B 5/40.

with form units as part of the floor
Definition statement
This subclass/group covers:

Floor structures wholly cast in situ with form units as part of the floor, the form units being either made in one piece or made of different elements, e.g. non-self-supporting form units.

References relevant to classification in this group
This subclass/group does not cover:
Sectional false floors
Special rules of classification within this group

Non-self-supporting floor form units, either made of one element or of a series of elements, are classified in E04B 5/36, except in case of metal form-slabs.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Floor form unit
A form, either made of one element or of a series of elements, that allows the floor to be cast over it, in situ, without the need of additional forms.
with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element {beams placed against one another and acting as permanent forms E04B 5/23}
Definition statement
This subclass/group covers:

Floor structures wholly cast in situ with slab-shaped substantially self-supporting form units acting simultaneously as reinforcement;

Form slabs with reinforcements of metal or other material extending laterally outside the form slab, and that are suitable to be embedded in the concrete of the floor slab to be cast in-situ, e.g. "Predalles" concrete slabs or semi-finished reinforced concrete slabs.

with metal form-slabs
Definition statement
This subclass/group covers:

Floor structures wholly cast in situ with metal form-slabs, e.g. with corrugated or non-corrugated metal form-slabs.

Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors ( {anchoring devices for balconies with means for preventing cold bridging E04B 1/0038} ; extraordinary constructions in general E04B 1/34)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Shear reinforcements, e.g. shear heads for floor slabs
Anchoring devices for balconies with means for preventing cold bridging
Extraordinary constructions in general
Buildings adapted to withstand abnormal external influences, e.g. earthquakes
Floors composed of stones, mortar, and reinforcing elements (with inserts of glass E04B 5/46)
Definition statement
This subclass/group covers:

Floors composed of stones, e.g. hollow bricks, mortar and reinforcing elements.

References relevant to classification in this group
This subclass/group does not cover:
Special adaptation of floors for transmission of light, e.g. by inserts of glass
Informative references
Attention is drawn to the following places, which may be of interest for search:
Load carrying floor structures assembled of prefabricated block-shaped elements
Beams built-up by elements joined in line
Special rules of classification within this group

Floor structures assembled of relatively large prefabricated block-shaped elements and relatively little mortar or concrete are classified in E04B 5/08.

Special adaptation of floors for transmission of light, e.g. by inserts of glass (of ceilings E04B 9/32, block-shaped elements E04C 1/42; slab- or sheet-shaped elements E04C 2/54; for roof covering E04D 3/06)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Translucent ceilings
Block-shaped building elements of glass or transparent material
Slab-like translucent building elements
Roof coverings of glass or other translucent materials
Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating (in block-shaped elements E04C 1/39; in slab- or sheet-shaped elements E04C 2/52)
Definition statement
This subclass/group covers:

Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating, in the structural body of the floor.

References relevant to classification in this group
This subclass/group does not cover:
Sectional false floors
Informative references
Attention is drawn to the following places, which may be of interest for search:
Building elements of block shape serving for locating conduits
Building elements of slab shape serving for locating conduits
Installation of electric cables in floors
Ventilation with air supply through perforated floors
Hot-water central heating systems
Roofs; Roof construction with regard to insulation (structures for roofs as well as for floors E04B 5/00; ceilings E04B 9/00; greenhouses A01G 9/14; large containers having floating covers B65D 88/34; roof trusses, trusslike structures, joists E04C 3/02; roof covering E04D)
Definition statement
This subclass/group covers:

Roofs, i.e. roof structures; Roof construction with regard to insulation, e.g. self-supporting insulated roof-slabs.

References relevant to classification in this group
This subclass/group does not cover:
Roof coverings
Roof covering insulation and roofs with insulation integrated in and around purlins and rafters
Structures for roofs, in particular for flat roofs, as well as for floors
Ceilings, i.e. suspended ceilings
Roof trusses per se, trusslike structures
E04C 3/02 - E04C3/394
Arched girders or portal frames
Three-dimensional frameworks
Tents or canopies, in general
Sunshades; Awnings
Large containers having floating covers
Informative references
Attention is drawn to the following places, which may be of interest for search:
Buildings or structures for particular purposes, e.g. bus shelters, swimming pools; coverings thereof
Arched structures; Vaulted structures; Folded structures
Extraordinary structures; Structures covering a large free area; Structures characterised by movable, separable or collapsible parts; Structures composed of box-like or cell-like units
with plane sloping surfaces, e.g. saddle roofs { (canopies E04F 10/00) } (E04B 7/12 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Canopies
Roofs formed in bays, e.g. saw-tooth roofs
{consisting of a plurality of parallel similar trusses or portal frames}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Roof trusses per se, trusslike structures
E04C 3/02 - E04C3/394
Arched girders or portal frames
{the trusses or frames supporting load-bearing purlins, e.g. braced purlins (battens, supports for battens E04D 12/00) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Roof battens; supports for roof battens
Synonyms and Keywords

In patent documents the following expressions/words " Purlins " and "Battens" are often used as synonyms.

{ consisting of prefabricated modules, e.g. box-like or cell-like units (E04B 7/24 takes precedence) }
Definition statement
This subclass/group covers:

Roof consisting of prefabricated modules, e.g. box-like or cell-like units, the prefabricated modules arriving in situ ready to be put in place as they are.

References relevant to classification in this group
This subclass/group does not cover:
Roofs consisting of self-supporting slabs, the slabs being collapsible or retractable, e.g. for transport
Informative references
Attention is drawn to the following places, which may be of interest for search:
Structures composed of box-like or cell-like units
{consisting of structures of pyramidal or conical shape}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Small buildings erected in the open air, e.g. waiting shelters, kiosks, beach cabins, public WC's
supported by horizontal beams or the equivalent resting on the walls (E04B 7/06 takes precedence)
Definition statement
This subclass/group covers:

Details of connections between the roof structure and the supporting walls, for roofs in which the roof structure is supported by the walls, e.g. roof trusses supported by horizontal beams resting on the walls.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Constructions of roof intersections or hipped ends
{ with connectors made of sheet metal for connecting the roof structure to the supporting wall (connectors made of sheet metal for wooden elongated load-supporting elements in general E04B 1/2608) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Connectors made of sheet metal for wooden elongated load supporting elements in general
Constructions of roof intersections or hipped ends
Informative references
Attention is drawn to the following places, which may be of interest for search:
Mutual connections of metal glazing bars
Greenhouses
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Hipped end
The ridge end or node defined by the junction of three or more triangular sloping faces in a hip roof
{Hipped ends}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Mutual connections of metal glazing bars on the ridge of the roof
Vaulted roofs (E04B 7/14 takes precedence; vaulted structures in general E04B 1/32; inflatable tents or canopies, in general E04H 15/20; inflatable forms for shaping in situ E04G 11/04)
Definition statement
This subclass/group covers:

Vaulted roofs, i.e. roofs having a general curved shape, in one or more directions, e.g. an arched shape, an hyperbolic-parabolic shape, a dome shape, a curved and folded shape.

References relevant to classification in this group
This subclass/group does not cover:
Suspended roofs
Inflatable tents or canopies, in general
Informative references
Attention is drawn to the following places, which may be of interest for search:
Saw-tooth roofs
Vaulted structures in general
Inflatable forms for shaping in situ
Extraordinary structures; Structures covering a large free area
Special rules of classification within this group

Barrel vaulted roofs are classified in E04C 3/08. Folded barrel vaulted roofs are classified in E04B 7/107.

Shell structures, e.g. of hyperbolic-parabolic shape; Grid-like formations acting as shell structures; Folded structures {buildings E04B 1/32}
Definition statement
This subclass/group covers:

Curved roof structures made by shell structures, e.g. roof structures of hyperbolic-parabolic shape made of a thin-shell concrete membrane, or by a plurality of thin-shell units connected together;

Curved roof structures made by grid-like formations acting as shell structures, i.e. thin and substantially self-supporting, that is without the need of intermediate supports;

Curved roof structures made by a folded structure, e.g. globally curved roof structures made by concertina-like folded metal sheets.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Arched buildings structures; Vaulted buildings structures; Folded buildings structures
Three-dimensional frameworks
Saw-tooth roofs
{Shell structures}
Definition statement
This subclass/group covers:

Curved roof structures made by shell structures, e.g. roof structures of hyperbolic-parabolic shape made of a thin-shell concrete membrane, or by a plurality of thin-shell units connected together.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Inflatable forms for shaping in situ
Arched structures comprised entirely of a single panel
Arched structures comprised of a number of panels connected together
Bending sheet metal
{Grid-like structures}
Definition statement
This subclass/group covers:

Curved roof structures made by grid-like formations acting as shell structures, i.e. thin and substantially self-supporting, that is without the need of intermediate supports.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Arched structures having a grid frame
{Folded structures}
Definition statement
This subclass/group covers:

Curved roof structures made by a folded structure, e.g. globally curved roof structures made by concertina-like folded metal sheets.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Saw-tooth roofs
Arched structures with faceted surfaces
Structures deriving their rigidity from concertina folds
Corrugating sheet metal
formed in bays, e.g. saw-tooth roofs (E04B 7/10 takes precedence)
Definition statement
This subclass/group covers:

Roofs formed in bays, e.g. massive saw-tooth roofs for factory buildings.

References relevant to classification in this group
This subclass/group does not cover:
Curved roof structures made by a folded structure, e.g. globally curved roof structures made by concertina-like folded metal sheets
Suspended roofs (suspended tents or canopies in general E04H 15/04)
Definition statement
This subclass/group covers:

Suspended roofs, i.e. permanent roofs suspended from a structure, e.g. a roof for a stadium consisting of a membrane suspended by cables, or a roof for a building consisting of a membrane being anchored along its borders on the walls of the building.

References relevant to classification in this group
This subclass/group does not cover:
Suspended tents or canopies in general
Informative references
Attention is drawn to the following places, which may be of interest for search:
Extraordinary structures; Structures covering a large free area
Roof structures with movable roof parts (buildings for special purposes E04H)
References relevant to classification in this group
This subclass/group does not cover:
Skylights or domes having movable parts
Informative references
Attention is drawn to the following places, which may be of interest for search:
Buildings for special purposes
Structures characterised by movable, separable or collapsible parts
{ characterised by a pivoting movement of the movable roof parts (E04B 7/166 takes precedence) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Roof structures with movable parts characterised by a translation movement
Skylights having movable parts pivoting about a fixed axis
{ characterised by a translation movement of the movable roof part, with or without additional movements}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Roof structures with movable parts characterised by a pivoting movement
Skylights having movable parts moving in their own plane
Special structures in or on roofs, e.g. dormer windows (in connection with roof coverings E04D 13/00, especially domes E04D 13/03)
References relevant to classification in this group
This subclass/group does not cover:
Special structures on roofs, in connection with roof coverings
Skylights and domes
Chimneys
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Dormer window
Roof window set in a structure that is protruding from the surface of a sloping roof; the window itself is substantially vertical
Roofs consisting of self-supporting slabs, e.g. able to be loaded
Definition statement
This subclass/group covers:

Roofs consisting of self-supporting slabs, e.g. a saddle roof in which each plane sloping surface is made by a series of adjacent self-supporting slabs resting only on the walls of the building and on the ridge beam of the roof.

References relevant to classification in this group
This subclass/group does not cover:
Waterproof roofing slabs comprising two or more layers, e.g. for insulation
Informative references
Attention is drawn to the following places, which may be of interest for search:
Building panels in general
Special rules of classification within this group

Self-supporting multi-layered roof slabs also used as roof coverings are classified both in E04B 7/20 to E04B 7/24, and in E04D 3/35 or its sub-groups.

{the slabs having non-structural supports for roofing materials (for slaps having insulating properties E04B 7/225) }
References relevant to classification in this group
This subclass/group does not cover:
Self-supporting insulating slabs for roofs, the slabs having non-structural supports for roofing materials
Roof battens
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Non-structural supports for roofing materials
Supports like battens, purlins
the slabs having insulating properties, e.g. laminated with layers of insulating material
Informative references
Attention is drawn to the following places, which may be of interest for search:
Waterproof roofing slabs comprising two or more layers, at least one of the layers being composed of insulating material
Sandwich panels
Layered products
Insulating devices or arrangements insofar as the roof covering is concerned
{the slabs having non-structural supports for roofing materials}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Roof battens
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Non-structural supports for roofing materials
Supports like battens, purlins
the slabs being collapsible {or retractable} , e.g. for transport
Informative references
Attention is drawn to the following places, which may be of interest for search:
Structures characterised by movable, separable or collapsible parts; with hinged parts
Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation (ceilings used as forms for making floors E04B 5/00; coverings or linings for ceilings E04F 13/00)
Definition statement
This subclass/group covers:
  • Ceilings, i.e. suspended ceilings and false ceilings;
  • Construction of suspended and false ceilings;
  • Suspended and false ceiling construction with regard to insulation.
References relevant to classification in this group
This subclass/group does not cover:
Ceilings used as forms for making floors
Coverings or linings for ceilings, directly attached to the lower face of the floor slab
Plastering, finishing work
Special rules of classification within this group

This subclass comprises only suspended ceilings and false ceilings. Ceiling consisting of ceiling panels, coverings or linings attached directly to the lower face of the floor slab are only classified in E04F 13/00.

Ceiling consisting of ceiling panels, coverings or linings indirectly attached to the lower face of the floor slab in a way similar to wall covering panels, e.g. with only one lath in-between wall and panel, are also only classified in E04F 13/00.

{characterised by provisions for heat or sound insulation}
Definition statement
This subclass/group covers:

Suspended ceilings or false ceilings having provisions for heat or sound insulation.

References relevant to classification in this group
This subclass/group does not cover:
Sound absorbing open-work ceilings; Ceilings with acoustic baffles, e.g. sound absorbing panels vertically suspended from the ceiling
Informative references
Attention is drawn to the following places, which may be of interest for search:
Suspended ceilings having slabs, panels
Heat, sound or noise insulation in buildings; with respect to heat only; with respect to sound only
Slab shaped sound absorbing elements for buildings
Slab shaped heat absorbing elements for buildings
Methods or devices for protecting against or damping noise
Means for suspending the supporting construction of the suspended ceilings from the floor slab, with arrangements for damping vibration
Special rules of classification within this group

Suspended or false ceilings having insulating slabs or panels with non-specified insulating properties are classified in E04B 9/04, not in E04B 9/001.

{with movable parts, e.g. pivoting panels, access doors}
References relevant to classification in this group
This subclass/group does not cover:
Access doors mechanically connected to loft ladders
Informative references
Attention is drawn to the following places, which may be of interest for search:
Doors
Hinges
Recessed bases for lighting devices, e.g. in ceilings
{composed of imitation beams or beam coverings}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Coverings or linings of wood
Caps covering surfaces of the supporting construction
{with means for hanging lighting fixtures or other appliances to the framework of the ceiling}
Definition statement
This subclass/group covers:

Suspended or false ceilings with means for hanging lighting fixtures or other appliances to the framework of the suspended or false ceiling, e.g. to the T-bars of a suspended ceiling.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Means for suspending the supporting construction of the suspended ceilings from the floor slab; adjustable
Supporting, suspending or attaching arrangements for lighting devices
Suspension of electric conduit channels
Supports for pipes
Special rules of classification within this group

Hanging means directly attached to the lower face of the floor slab are not classified here.

Translucent ceilings, i.e. permitting both the transmission and diffusion of light are classified in E04B 9/32.

{with means for connecting partition walls or panels to the ceilings}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Partition walls; removable partition walls
having means for ventilation or vapour discharge
Definition statement
This subclass/group covers:

Suspended or false ceilings having means for ventilation or vapour discharge.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Ventilation, air conditioning systems; Air-humidification systems
Clean-rooms
Suspended or false ceilings having means for ventilation or vapour discharge, the supporting ceiling grid acting as air diffuser
Special rules of classification within this group

Classify in E04B 9/02 only if the ceiling components themselves, e.g. the ceiling panels or the framework of the ceiling, have something special in relation to ventilation or vapour discharge.

A general ceiling having only openings for ventilation ducts and no other specific ventilation feature, should not be classified in E04B 9/02. Conversely, a clean room ceiling having openings for ventilation ducts, the rest of the ceiling being air-tight, should be classified in E04B 9/02, the air-tightness of the ceiling being a specific feature of the ceiling linked to the ventilation of the clean room.

comprising slabs, { panels,} sheets or the like
Definition statement
This subclass/group covers:

Suspended or false ceilings comprising slabs, sheets or the like, e.g. suspended ceiling comprising inverted tee-bars and panels.

References relevant to classification in this group
This subclass/group does not cover:
Open-work ceilings, e.g. grids
Informative references
Attention is drawn to the following places, which may be of interest for search:
Building slabs, sheets or panels per se
Coverings or linings for walls or ceilings
Slab shaped sound absorbing elements for buildings
Slab shaped heat absorbing elements for buildings
Ceiling panels lifting devices
Special rules of classification within this group

Classify a suspended or false ceiling comprising slabs, sheets or the like in E04B 9/04 only if the slabs, sheet or the like have some special technical feature, e.g. a special composition, a special geometry, special borders.

{ comprising ducts}
References relevant to classification in this group
This subclass/group does not cover:
Ceiling heating, cooling and ventilating systems in general
{ having closed internal cavities}
References relevant to classification in this group
This subclass/group does not cover:
Ceiling panels having a honeycomb core structure
{ of the tray type}
Definition statement
This subclass/group covers:

Ceiling panels consisting of a tray made of a single element, and having 1 to 4 upstanding borders on their sides.

References relevant to classification in this group
This subclass/group does not cover:
Ceiling panels having a frame
characterised by constructional features of the supporting construction, { e.g. cross section or material of framework members}
Definition statement
This subclass/group covers:

Suspended or false ceilings characterised by constructional features of the supporting construction, e.g. by the cross section or the material of T-bar members.

References relevant to classification in this group
This subclass/group does not cover:
Constructional features of the means for suspending the supporting construction
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cross-sectional aspects of metal beams, girders or joists
{ comprising extruded supporting beams}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion of metal
Extrusion of plastics
{ comprising supporting beams having a folded cross-section}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Metal beams made of bent sheet material
Bending of sheet metal
having the capability of expansion {e.g. in case of fire}
Definition statement
This subclass/group covers:

Suspended or false ceilings comprising a supporting construction having the capability of expansion.

Connections between parallel members of the supporting construction (E04B 9/08 takes precedence)
Definition statement
This subclass/group covers:

Connections between parallel members of the supporting construction, e.g. connections side to side of T-bars or connections tip to tip with an additional joining element

References relevant to classification in this group
This subclass/group does not cover:
Suspended or false ceilings comprising a supporting construction having the capability of expansion.
Connections between non-parallel members of the supporting construction (E04B 9/08 takes precedence)
References relevant to classification in this group
This subclass/group does not cover:
Suspended or false ceilings comprising a supporting construction having the capability of expansion.
Informative references
Attention is drawn to the following places, which may be of interest for search:
Grid-like ceilings
Connection details of elongated metal supporting parts
Racks for cabinets
Special rules of classification within this group

Grid-like ceilings that are suitable for supporting panels can also be classified in E04B 9/12 or its subgroups.

Means for suspending the supporting construction
Definition statement
This subclass/group covers:

Means for suspending the supporting construction of the suspended ceiling from the lower face of the floor slab.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Suspended or false ceilings with means for hanging lighting fixtures or other appliances to the framework of the suspended or false ceiling,
Supporting, suspending or attaching arrangements for lighting devices
Suspension of electric conduit channels
Supports for pipes
Separate fastening elements for wall covering elements
adjustable
Definition statement
This subclass/group covers:

Adjustable means for suspending the supporting construction of the suspended ceiling from the lower face of the floor slab, particularly means adjustable in length.

Connection of slabs, { panels,} sheets or the like to the supporting construction
Definition statement
This subclass/group covers:

Connections of substantially horizontal slabs, sheets or the like to the supporting construction of a suspended or false ceiling.

References relevant to classification in this group
This subclass/group does not cover:
Open-work ceilings, e.g. grids
with the slabs, { panels,} sheets or the like positioned on { the upperside of} , or held against { the underside of the} horizontal flanges of the supporting construction { or accessory means connected thereto}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Suspended ceilings comprising a supporting grid consisting of inverted T-shaped sections
{ with the slabs, { panels,} sheets or the like positioned on the upperside of the horizontal flanges of the supporting construction}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Suspended ceilings comprising a supporting grid consisting of inverted T-shaped sections
[by means of screws, bolts or clamping strips held against the underside of the supporting construction (E04B 9/26 takes precedence) ]
Informative references
Attention is drawn to the following places, which may be of interest for search:
Connections of slabs to the supporting construction of a suspended ceiling by means of snap action of elastically deformable elements held against the underside of the supporting construction
Fastening devices in general
{by means of sliding or pivoting locking elements, held against the underside of the supporting construction}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Fastening devices in general
{by means of permanent magnetic force held against the underside of the supporting construction}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Coverings fixed to walls by means of magnets
by means of snap action of elastically deformable elements {held against the underside of the supporting construction}
Definition statement
This subclass/group covers:

Connections of substantially horizontal slabs, sheets or the like to the supporting construction of a suspended or false ceiling by means of snap action of elastically deformable elements held against the underside of the supporting construction.

with the slabs, { panels,} sheets or the like having grooves engaging with horizontal flanges of the supporting construction or accessory means connected thereto
Informative references
Attention is drawn to the following places, which may be of interest for search:
Suspended ceilings comprising a supporting grid consisting of inverted T-shaped sections
characterised by edge details of the ceiling; e.g. securing to an adjacent wall
Informative references
Attention is drawn to the following places, which may be of interest for search:
Connections between non-parallel members of the supporting construction, one member being discontinuous and abutting against the other member
Finishing strips between ceiling and wall
{for flexible tensioned membranes}
Definition statement
This subclass/group covers:

Suspended or false ceilings comprising a flexible tensioned membrane secured to the supporting construction and/or to the adjacent walls.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Tapestry work
Ceiling slabs comprising fabrics tensioned on frames
Boards having display surface tensioning means
Coverings made of fabrics
Translucent ceilings, i.e. permitting both the transmission and diffusion of light ( {E04B 9/303 and} E04B 9/34 take precedence; details of lighting devices, of general application F21V; screens F21V 11/00)
References relevant to classification in this group
This subclass/group does not cover:
Grid-like or open-work ceilings, e.g. lattice type ceilings
Details of lighting devices, of general application
Screens for lighting devices
Informative references
Attention is drawn to the following places, which may be of interest for search:
Suspended or false ceilings comprising a flexible tensioned membrane secured to the supporting construction and/or to the adjacent walls.
Translucent floors
Translucent roofs
Special rules of classification within this group

Suspended or false ceilings with means for hanging lighting fixtures or other appliances to the framework of the suspended or false ceiling, e.g. to the T-bars of a suspended ceiling, are classified in E04B 9/006.

{Grid-like or} open-work ceilings, e.g. lattice type {boxlike modules, acoustic baffles} (E04B 9/30 takes precedence, grids for lighting devices F21V)
References relevant to classification in this group
This subclass/group does not cover:
Grids for lighting devices
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of ceiling edges
Slab shaped sound absorbing elements for buildings
Sound or noise insulation in buildings
Methods or devices for protecting against or damping noise
Special rules of classification within this group

Ceilings comprising suspended box-like modules are classified in E04B 9/34.

Ceilings comprising suspended vertical panels used as acoustic baffles are classified in E04B 9/34.

{consisting of non-parallel slats, e.g. grids}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Connections between non parallel members of the supporting construction of a suspended ceiling
Special rules of classification within this group

Grid-like ceilings are classified in E04B 9/345.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Slat
A long, thin, flat piece of lumber, metal or plastic.
consisting of parallel slats
Special rules of classification within this group

Open-work ceilings consisting of slats having horizontal principal plane and slats having vertical principal plane are classified in E04B 9/36.

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Last Modified: 10/11/2013