Answered: Select the lightest possible W-section…

Select the lightest possible W-section for the beam shown in Figure 1. Assume ?? = 50 ?, full compression flange lateral support, and exclude beam self-weight.

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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Concept explainers

Connections

In steel structures, connections are the members that join two or more steel members. The connections are the most important members of any steel structure, and hence, they are designed more carefully. The majority of the construction cost of steel structures is incurred due to the connections. The design of connections is done as per the recommendations and specifications of the American Institute of Steel Construction (AISC).

Question

Select the lightest possible W-section for the beam shown in Figure 1. Assume ?? =
50 ?, full compression flange lateral support, and exclude beam self-weight.

K
6 ft
PL = 6 k
6 ft
18 ft
PL = 6 k
*
6 ft
✈
Figure 1: Beam boundary condition and applied loads
P₁
2
WD
= 3 k
=
2.0 k/ft

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Step 1: Given

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Step 2: Maximum shear force and maximum moment

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Step 3: Section modulus calculations

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Step 4: Shear consideration

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Step 5: W section selection

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