US 9,809,979 B2
Pre-stressed beams or panels
Alessandro Palermo, Christchurch (NZ); and Stefano Pampanin, Christchurch (NZ)
Assigned to University of Canterbury, Christchurch (NZ)
Appl. No. 14/888,679
Filed by UNIVERSITY OF CANTERBURY, Christchurch (NZ)
PCT Filed May 6, 2014, PCT No. PCT/NZ2014/000081
§ 371(c)(1), (2) Date Nov. 2, 2015,
PCT Pub. No. WO2014/182178, PCT Pub. Date Nov. 13, 2014.
Claims priority of provisional application 61/819,724, filed on May 6, 2013.
Prior Publication US 2016/0069080 A1, Mar. 10, 2016
Int. Cl. E04C 3/18 (2006.01); E04C 3/26 (2006.01); E04B 5/12 (2006.01); E04C 1/40 (2006.01); E04C 2/10 (2006.01); E04C 2/26 (2006.01); E04C 2/38 (2006.01); E04C 2/42 (2006.01); E04C 3/29 (2006.01); E04B 5/23 (2006.01); E04B 1/06 (2006.01); E04B 1/14 (2006.01); E04B 1/22 (2006.01); E04B 1/30 (2006.01); E04C 2/28 (2006.01); E04C 5/12 (2006.01); E04C 5/08 (2006.01); E04B 5/04 (2006.01)
CPC E04C 3/26 (2013.01) [E04B 1/06 (2013.01); E04B 1/14 (2013.01); E04B 1/22 (2013.01); E04B 1/30 (2013.01); E04B 5/12 (2013.01); E04B 5/23 (2013.01); E04C 1/40 (2013.01); E04C 2/10 (2013.01); E04C 2/26 (2013.01); E04C 2/28 (2013.01); E04C 2/38 (2013.01); E04C 2/42 (2013.01); E04C 3/29 (2013.01); E04C 5/12 (2013.01); E04B 5/04 (2013.01); E04B 2005/232 (2013.01); E04C 3/18 (2013.01); E04C 5/08 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method of manufacturing a pre-stressed beam or panel comprising:
providing a timber-based component;
providing a pre-stressing member arranged along the timber-based component;
applying a tensile force to the pre-stressing member;
providing discrete concrete anchors at locations that are spaced apart along the timber-based component;
coupling the pre-stressing member to the concrete anchors;
releasing the tensile force on the pre-stressing member to transfer a compressive force to the timber-based component through the concrete anchors to form the pre-stressed beam or panel,
wherein the concrete anchors are provided by pouring concrete at two spaced apart locations that are spaced apart along the timber-based component and that are positioned at or adjacent the ends of the timber-based component to form end anchors, embedding respective portions of the pre-stressing member, and wherein the coupling the pre-stressing member to the anchors comprises allowing the concrete to substantially cure, before the tensile force on the pre-stressing member is released;
pouring concrete at one or more locations between the two end anchors to form one or more intermediate concrete anchors embedding a respective intermediate portion of the pre-stressing member;
allowing the one or more intermediate concrete anchors to substantially cure; and
cutting the beam or panel through the one or more intermediate concrete anchors and through the respective anchored intermediate portion of the pre-stressing member to form two or more shorter pre-stressed beams or panels.