Allowable Deflections


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Title: Allowable Deflections

Author(s): Subcommittee I, ACI Committee 435

Publication: Journal Proceedings

Volume: 65

Issue: 6

Appears on pages(s): 433-444

Keywords: creep (materials);damping;deflection;modulus of elasticity;reinforced concrete;serviceablity;shrinkage;span-depth ratiostructural analysis;structural design;temperature;vibration.

Date: 6/1/1968

Discusses the factors affecting the deflection of reinforced concrete members and emphasizes the importance of taking them all into consideration for an accurate estimate of deflection. Includes a table with an extensive list of situations requiring deflection limitations. These are based on L/ A ratios and absolute values applied to the total or incremental deflections. Discusses the most significant parameters af-fecting the L/D ratios as an indirect limit on deflections. Presents formulas and graphs for L/D and gives examples for their use. The report is divided into five chapters: Introduction, Computation of Deflections, Allowable Deflections, Allowable Span/Depth Ratios, and Correlation with Actual Building Structures.