A precast concrete slab detailing supported on four sides and with reinforcing steel perpendicular to all sides is called a two-way slab. Such slabs generally are detailed by empirical methods. A two-way slab is divided into strips for detailing purposes. When a slab is supported directly on columns, without beams and girders, it is called a flat plate or flat slab. Although thicker and more heavily reinforced than slabs in beam-and-girder construction, flat slabs are advantageous because they offer no obstruction to passage of light; savings in story height and in the simpler formwork involved; less danger of collapse due to overload; and better fire protection with a sprinkler system because the spray is not obstructed by beams.
We also detailing raft footing slabs for various applications, with pier and edge-beam concept, waffle slab detailing or edge and intermediate beam concept deailing, according to the soil conditions and the relevant residential footing detailing codes.
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