US 12,312,809 B2
Gypsum-based load-bearing board, load-bearing wall structure, and load-bearing wall construction method for wooden construction building
Ushio Sudo, Tokyo (JP); Wataru Nakamura, Tokyo (JP); Tomoya Hasegawa, Tokyo (JP); Muneyoshi Nagano, Tokyo (JP); Masahiro Wada, Tokyo (JP); Katsumi Tada, Tokyo (JP); Yousuke Sato, Tokyo (JP); and Daisuke Naito, Tokyo (JP)
Assigned to YOSHINO GYPSUM CO., LTD., Tokyo (JP)
Appl. No. 17/995,164
Filed by YOSHINO GYPSUM CO., LTD., Tokyo (JP)
PCT Filed Apr. 1, 2021, PCT No. PCT/JP2021/014227
§ 371(c)(1), (2) Date Feb. 13, 2023,
PCT Pub. No. WO2021/205993, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 2020-068198 (JP), filed on Apr. 6, 2020.
Prior Publication US 2024/0200330 A1, Jun. 20, 2024
Int. Cl. E04B 2/00 (2006.01); B32B 13/02 (2006.01); B32B 13/08 (2006.01); E04C 2/04 (2006.01); G01N 3/24 (2006.01)
CPC E04C 2/46 (2013.01) [B32B 13/02 (2013.01); B32B 13/08 (2013.01); E04C 2/043 (2013.01); G01N 3/24 (2013.01); B32B 2307/54 (2013.01); B32B 2307/718 (2013.01); B32B 2307/72 (2013.01); B32B 2307/7376 (2023.05); B32B 2607/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wooden load-bearing wall having a gypsum-based load-bearing board comprising:
a main member or a core member formed from a board-shaped hardened gypsum containing an inorganic fiber including glass fibers and an organic-based strength enhancer including starch that exert a lateral nail resistance of 500 N or more, the inorganic fiber being 0.3 to 5 parts by weight based on 100 parts by weight of calcined gypsum, and the organic-based strength enhancer being 0.3 to 15 parts by weight based on 100 parts by weight of calcined gypsum, and a paper covering at least front and back sides of the main member or the core member, the main member and the paper or the core member and the paper constituting the load-bearing board, and a plate thickness of the gypsum-based load-bearing board being less than 12 mm.