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Using the bending moment criteria, 1- will the W21x50 satisfy the new design load? 2- Explain and demonstrate briefly why.

Using the bending moment criteria, 1- will the W21x50 satisfy the new design load? 2- Explain and demonstrate briefly why.

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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The roof beams of a building were originally designed with a minimum live load as given by the building code to account for snow load only. It has since been decided that the roof will serve as a helipad, thus requiring a verification of the initial design. Initially, A992 steel (Fy=50ksi) W 21x50 was selected (Zx= 111 in) for the roof beams based on a maximum moment of 400 kips.ft from the factored design load. Accounting for the actual live load from the helipad will increase the maximum moment by 25%. Using the bending moment criteria, 1- will the W21x50 satisfy the new design load? 2- Explain and demonstrate briefly why.
Transcribed Image Text:The roof beams of a building were originally designed with a minimum live load as given by the building code to account for snow load only. It has since been decided that the roof will serve as a helipad, thus requiring a verification of the initial design. Initially, A992 steel (Fy=50ksi) W 21x50 was selected (Zx= 111 in) for the roof beams based on a maximum moment of 400 kips.ft from the factored design load. Accounting for the actual live load from the helipad will increase the maximum moment by 25%. Using the bending moment criteria, 1- will the W21x50 satisfy the new design load? 2- Explain and demonstrate briefly why.
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