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a) Determine the value of the ratio L/rT. b) Determine the allowable bending stress in MPa.

a) Determine the value of the ratio L/rT. b) Determine the allowable bending stress in MPa.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Steel Design

W21x62 steel is used as a beam simply supported over a span of 8 m. The beam is laterally unsupported over the entire span. Fy = 250 MPa.

The properties of the section are as follows:

Depth, d = 533 mm

Flange width, bf = 210 mm

Flange thickness, tf = 15.6 mm

Web thickness, tw = 10.2 mm

Radius of gyration, rT = 53.34 mm

Section modulus, Sx = 2,077 x 103 mm3

 

a) Determine the value of the ratio L/rT.

b) Determine the allowable bending stress in MPa.

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