FIELD: construction industry.
SUBSTANCE: structures of lightweight slabs with voids in different directions, which can be used in ceilings and coverings of buildings and structures when the slab is supported along the contour or on three sides. Reinforced hollow slab contains lower and upper reinforced parts of the slab, nonrecoverable tubular void formers in the mid-height part of the slab and reinforced bridges formed between these void formers connecting the lower and upper parts of the slab. The slab contains tubular void formers, parallel to each other and/or intersecting, forming voids, and the axes of the voids are located along the lines of principal stresses, perpendicular to the probable fault lines. The lower part of the slab contains principal reinforcement, the upper part contains distribution reinforcement, and the bridges between the lower and upper parts contain transverse reinforcement and have voids.
EFFECT: reduction of labour costs in manufacturing.
7 cl, 7 dwg
