A simple, design oriented procedure for the control of deflection in reinforced concrete slab systems is proposed. A rational and reliable expression for the maximum allowable span to depth ratio for beams, proposed recently by Rangan, is extended to the entire range of reinforced concrete flexural members including two-way, edge-supported 1 slabs; flat slabs; and flat plates. The data used for the calibration of the procedure were obtained from an extensive series of computer experiments with reinforced concrete slabs conducted using a nonlin-1 ear, finite element model. The techniques are illustrated by example and a comparison with available field measurements of in-service slab behavior is made.
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