BED PLATE FOR DRY CONSTRUCTION, ITS MANUFACTURE AND DRY CONSTRUCTION BODY

PROBLEM TO BE SOLVED: To improve the moldability and waterproof property of a bed plate by providing, on the surface of the bed plate, a protruding part having a hook part for receiving a hook engagement part provided on the reverse side of a building material formed along the upper end thereof in a plurality of upper and lower steps, and forming a cutout part having a specified form so as to cut the engaging surface with the engagement part of the building material in the hook part. SOLUTION: A plurality of protruding parts 2 for hooking a tile 5 extended in the width direction is formed at a prescribed vertical space on the surface of a bed plate 1. The protruding part 2 has a vertical sectional hook part 2a formed by obliquely inclining the upper end, so that the tile 5 can be held by engaging an engagement part 5a on the reverse side of the tile 5 with the hook part 2a. A cutout part 3 is formed at the upper end of the protruding part 2 so as to cut the engaging surface 2b of the hook part 2a with the engagement part 5a of the tile 5, and the cutout part 3 is formed so that the inclination of the cutout part 3 is extended forward from the bottom surface 4 of the bed late 1 or the engagement surface 2b at an angle larger than 900 deg. to the bottom surface 4 of the bed plate 1 over the full length 3b of the circumference.