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Unformatted text preview: The reinforcement lengths can be obtained from Figure 83 of PCAs Simplified Design of Concrete Buildings of Moderate Height and Height in lieu of using ACIs Section 12.10 through 12.12. Two #5 bars are provided within the center portion of the span to account for any variation in the required bar lengths due to wind effects, although it may be more economical to actually determine the correct lengths. Since the beams are part of the primary lateralloadresisting system, ACI Section 12.11.2 requires that at least onefourth of the positive moment reinforcement extend into the support and be anchored to develop f y in tension at the face of the support. References. 1) D. Fanella, Timesaving Design Aids for Reinforced Concrete, Part 1: Beams and Oneway Slabs, Structural Engineer, August 2001; 2) PCA, Simplified Design of Concrete Buildings of Moderate Height and Height....
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 Fall '08
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