Steel DesignW21x62 steel is used as a beam simply supported over a spanof 8 m. The beam is laterally unsupported over the entire spanFy = 250 MPa.The properties of the section are as follows:Depth, d = 533 mmFlange width, bf = 210 mmFlange thickness, tf = 15.6 mmWeb thickness, tw = 10.2 mmRadius of gyration, rT = 53.34 mmSection modulus, Sx = 2,077 x 103 mm³a) Determine the value of the ratio L/rT.b) Determine the allowable bending stress in MPa.

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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 spa Fy = 250 MPa. The properties of the section are as follows: Depth, d = 533 mm Flange width, bf = 210 mm

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 spa Fy = 250 MPa. The properties of the section are as follows: Depth, d = 533 mm Flange width, bf = 210 mm

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 5.6.2P

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Concept explainers

Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.

Question

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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