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Title: Statistical Evaluation of Minimum Thickness Provisions for Slab Deflection Control

Author(s): Raul Bertero and Agustin Bertero

Publication: Structural Journal

Volume: 115

Issue: 6

Appears on pages(s): 1659-1670

Keywords: deflection control; minimum thickness; serviceability; two-way slabs

Date: 11/1/2018

Minimum thickness provisions are widely used in engineering practice to comply with the serviceability requirements for two-way slabs without calculating the expected deflection under service conditions. However, concern has been raised about the effectiveness that the 45-year-old provisions in ACI 318 have in controlling slab deflections within the permissible values. Using the finite element method and the provisions of ACI 318-14, this paper evaluates from a statistical standpoint the computed deflections of two-way slabs designed to comply with the minimum thickness requirements in ACI 318-14. Based on the results, recommendations are made for future revisions of the Code.


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