Two way slabs are the slabs that are supported on four sides and the ratio of longer span (l) to shorter span (b) is less than 2. In two way slabs, load will be carried in both the directions. So, main reinforcement is provided in both direction for two way slabs.
ACI 318 Direct Design Method will be used in this example to design an interior bay of a flat plate slab system of  multi bay building.


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