| 摘要 |
PROBLEM TO BE SOLVED: To provide an extrusion molding cement plate in which a hollow part capable of improving fire resistance efficiency is formed in a two stage shape, while solving troubles such as pull-cracks.SOLUTION: In an extrusion molding cement plate 10, a plurality of quadrangular cross-section hollow parts 2 each opening at both end faces in the longitudinal direction are formed in a band plate-shaped plate body 1. The hollow parts 2 are arranged in a parallel manner with each other, are provided in a two stage shape via a lateral rib part 3 in the thickness direction of the plate body 1, and the plurality of hollow parts are provided via cross rib parts 4 in the transverse direction of the plate body 1. A thickness A of a side wall part 5 along the thickness direction of the plate body 1 is 10 mm to 20 mm, a total thickness of the plate body 1 is 80 mm to 110 mm, the relationship between the thickness A of the side wall part 5 and a thickness C of the lateral rib part 3 satisfies C≥A, and the relationship between the thickness A of a side wall part 5 and a thickness F of the cross rib part 4 satisfies (A+5) mm≥F≥(A-5) mm. |
