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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: ACI Code Deflection Requirements-Time for a Change?
Author(s): K. B. Bondy, FACI
Publication: Special Publication
Appears on pages(s): 133-146
Keywords: code; computations; deflection; slabs
Abstract:This paper critically examines the deflection criteria in Chapter 9 of the current ACI Building Code, ACI 318-02, with a particular focus on two-way non-prestressed slabs. The relationship between criteria based on deflection computations and arbitrary minimum thicknesses, which are independent of loading and concrete strength, are scrutinized. A numerical example is presented in which it is demonstrated that current code criteria can lead to unsatisfactory performance in heavily loaded slabs. Recommendations are made for changes to improve code deflection criteria.
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