The steel bar truss floor bearing plate is directly supported on the steel beam or the concrete beam, itself is the stress bar of the concrete floor slab, is also the template of the floor slab support frame is the concrete floor slab, saves the labor of erecting the support frame and the support template, will be more favored in the current era of labor and employment shortage, and also reduces the labor cost, accelerates the construction progress, has a good effect on reducing economic cost and increasing efficiency.
The mechanical performance of the concrete floor slab is improved, the self-weight of the concrete slab is completely borne by the steel bar, and the tensile stress in the concrete is not generated, and the concrete tensile stress in the negative moment area and the positive moment area in the use stage is significantly reduced, and the crack width is reduced. The presence of galvanized steel avoids the exposure of cracks in the lower part of the floor slab, and improves the performance and durability of the floor slab. The floor deck reinforcement is wrapped in concrete, which is reliably fire resistant. The experiment shows that when the thickness of the floor slab is 100mm thick (the corresponding steel truss height is 70mm), the fire resistance time limit is 1.68h, and the galvanized steel plate does not need fire protection.
