| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structural material used for the construction of concrete floor slab, enhanced in mechanical strength and improved in the appearance of a lower face. SOLUTION: This floor structural material is provided with a self-supported truss 1 constructed by arranging one upper chord reinforcement 11 and two lower chord reinforcements 12 in a triangular shape, welding the upper chord reinforcement 11 to upper bent parts 15 of two lattice reinforcements 13 bent in wave shapes and welding the lower chord reinforcements 12 to lower parts of the lattice reinforcements 13; a first iron plate 2 to which lower bent parts 16 of the lattice reinforcements 13 of the self-supported truss 1 are welded and fixed; and a second iron plate 3 put over the lower face of the first iron plate 2. The first iron plate 2 and the second iron plate 3 are jointed to form a layered body. COPYRIGHT: (C)2004,JPO
|
