Basically, a building is a series of floors held up by columns and walls. There are a number of standard floor/roof structural systems used in cast-in-place reinforced concrete construction. * Two-way flat plate system. There are...
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Basically, a building is a series of floors held up by columns and walls. There are a number of standard floor/roof structural systems used in cast-in-place reinforced concrete construction. * Two-way flat plate system. There are no beams between the columns. Instead, the floor is slightly thicker and more heavily reinforced in both directions. There is extra reinforcing in the floor at the columns to transfer the loads properly. * Two-way flat slab with drop panels. The extra thickness around the columns is there to strengthen the column-floor connection and resist the negative moments. The floor itself can be slightly thinner with less dead weight. * One-way beam and slab. The floor loads are transferred to the beams, which are then transferred to the columns. * One-way joist slab. The joists act like small beams. This floor system is very economical because the formwork is readily available, and less reinforcing is need. Because there's only a small span between each joist, the slab can be thinner. * One-way wide module joist slab in the lower middle is a variation on the one-way joist slab. * Two-way joist slab, also called a waffle slab. Because there are joists in both directions, this floor system is the strongest and will have the least deflection. It's typically used when stiffness is important or if there are abnormally heavy loads.
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