Patent ID: 8375676

Claim:
A method for structuring a slab by use of a half precast slab, said method comprising the steps of: arranging a plurality of precast members each of which includes a bottom part extending in a longitudinal direction, a pair of side walls provided upright on both edges of the bottom part in parallel with each other in a direction perpendicular to the longitudinal direction; an upper space for receiving concrete surrounded by the bottom part and the pair of side walls, wherein each of the side walls, other than two outermost side walls on both edges of the arranged precast members, has a height less than the two outermost side walls so that the upper spaces of the arranged precast members are in communication with each other to form a single reinforcing bar arrangement space over the arranged precast members; connecting the arranged precast members to each other so that the side walls of two adjacent precast members are in contact with each other; arranging reinforcing bars in the single reinforcing bar arrangement space; and casting concrete into the single reinforcing bar arrangement space to form a composite slab comprising the concrete, the reinforcing bars, and the precast members, wherein, in the step of connecting the arranged precast members, the arranged precast members are connected to each other by: placing prestressing steel wires along the direction perpendicular to the longitudinal direction to penetrate the arranged precast members; applying tension force to each prestressing steel wire; and fixing each end of the prestressing steel wire with a fixing member.