Gypsum-based load-bearing board, load-bearing wall structure, and load-bearing wall construction method for wooden construction building

A method of constructing a wooden load-bearing wall fastening a gypsum-based load-bearing board to a wooden wall base used in a wooden framework construction method or a framework wall construction method by a fastener, the method comprising:

• fastening the gypsum-based load-bearing board to the wooden wall base, in which the gypsum-based load-bearing board is constituted by 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.

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 to constitute the load-bearing board, and a plate thickness of the gypsum-based load-bearing board being less than 12 mm.