Answered: Each of the three rolled-steel beams…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Each of the three rolled-steel beams shown (numbered 1, 2, and 3) is to carry a 64-kip load uniformly distributed over the beam. Each of these beams has a 12-ft span and is to be supported by the two 24-ft rolled-steel girders AC and BD. The allowable normal stress for the steel used is 22.5 ksi.

Determine the section modulus for each girder and select the most economical W shape for the two girders using the table given below. (Round the final answer to one decimal place.)

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Required information
Each of the three rolled-steel beams shown (numbered 1, 2, and 3) is to carry a
64-kip load uniformly distributed over the beam. Each of these beams has a 12-
ft span and is to be supported by the two 24-ft rolled-steel girders AC and BD.
The allowable normal stress for the steel used is 22.5 ksi.
A
B
Shape
W30 × 99
W27 X 84
W24 x 104
W21 x 101
W18 x 106
Determine the section modulus for each girder and select the most economical W shape for the
two girders using the table given below. (Round the final answer to one decimal place.)
S'(in ³)
269
213
258
227
204
12 ft
The section modulus is
D
in³.
The most economical W shape is (Click to select)

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