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1. Five uncoated #9 bars have been selected for the beam shown below. As required is 4.90 in². f'c=4000 psi and fy=60,000 psi. Determine the minimum development length, lah, outside diameter, R and straight extension, lext needed for the standard 90° hooks. Assume that the bars have 3-in side and top cover measured from the c.g. of bars and are used in normal-weight concrete. Minimum center to center spacing of hooked bars is greater than 6db. * dh lah = ? Outside Radius, R=? Critical Section Lext=?

1. Five uncoated #9 bars have been selected for the beam shown below. As required is 4.90 in². f'c=4000 psi and fy=60,000 psi. Determine the minimum development length, lah, outside diameter, R and straight extension, lext needed for the standard 90° hooks. Assume that the bars have 3-in side and top cover measured from the c.g. of bars and are used in normal-weight concrete. Minimum center to center spacing of hooked bars is greater than 6db. * dh lah = ? Outside Radius, R=? Critical Section Lext=?

Steel Design (Activate Learning with these NEW titles from Engineering!)
Steel Design (Activate Learning with these NEW titles from Engineering!)
6th Edition
ISBN:9781337094740
Author:Segui, William T.
Publisher:Segui, William T.
Chapter5: Beams
Section: Chapter Questions
Problem 5.13.1P
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1. Five uncoated #9 bars have been selected for the beam shown below. As required is 4.90 in². f'c=4000 psi and fy=60,000 psi. Determine the minimum development length, lah, outside diameter, R and straight extension, lext needed for the standard 90° hooks. Assume that the bars have 3-in side and top cover measured from the c.g. of bars and are used in normal-weight concrete. Minimum center to center spacing of hooked bars is greater than 6db. * dh lah = ? Outside Radius, R=? Critical Section Lext=?
Transcribed Image Text:1. Five uncoated #9 bars have been selected for the beam shown below. As required is 4.90 in². f'c=4000 psi and fy=60,000 psi. Determine the minimum development length, lah, outside diameter, R and straight extension, lext needed for the standard 90° hooks. Assume that the bars have 3-in side and top cover measured from the c.g. of bars and are used in normal-weight concrete. Minimum center to center spacing of hooked bars is greater than 6db. * dh lah = ? Outside Radius, R=? Critical Section Lext=?
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