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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: Practical Deflection Prediction of Concrete Slabs
Author(s): Jonathan Hirsch, Flora Calabrese, Eamonn Connolly, and Allan Bommer
Publication: Special Publication
Appears on pages(s): 1-24
Keywords: cracking, creep, deflection, shrinkage
Abstract:Today’s slab designers face a quandary – economic efficiency demands the use of very thin slabs; however the deflection performance of these slabs is difficult to predict. Exacerbating the situation is that the construction methods and sequences to be utilized are unknown at the time of design. This paper looks at the predictions of several deflection calculation methods and then compares them to actual measured deflections in both the laboratory and field. The variability of deflections and the reasonable range of predictions are also discussed concluding with recommendations for design practice utilizing off-the-shelf software.
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