Design and Serviceability of Reinforced Concrete Floor Systems

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Title: Design and Serviceability of Reinforced Concrete Floor Systems

Author(s): Stephen J. Sopko

Publication: Special Publication

Volume: 133

Issue:

Appears on pages(s): 121-132

Keywords: cracking (fracturing); deflection; floors; loads (forces); reinforced concrete; serviceability; stresses; structural design; Design

Date: 9/1/1992

Abstract:
Reinforced concrete floor systems must be analyzed for deflections to minimize serviceability problems such as excessive deflections. Member depths should be based on serviceability requirements as well as stress, especially when long-term deflection must be considered. The ACI equations for member depth may not always be adequate to prevent excessive long-term deflections of reinforced concrete floor members where heavy sustained loads are present. Two case studies are presented focusing on floor systems which have exhibited excessive deflections. From this investigation and analysis, proper design, detailing, and construction practices will be discussed to minimize serviceability problems. Care must be taken in analyzing and designing floor systems which support heavy sustained loadings or masonry.