For a built-up column with lacing, what percentage of the axial load is considered as the transverse shear force (Vt) that the lacing system must resist?
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A.
1.5%
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B.
2.5%
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C.
2.0%
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D.
3.0%
Correct Answer:
B. 2.5%
Explanation:
The correct answer is 2.50%.
According to standard engineering practice for steel structures, specifically IS 800, a built-up column using a lacing system must be designed to handle more than just axial loads. To account for factors like accidental eccentricity or lateral deformation, the lacing members are required to resist a total transverse shear force (Vt). This force is calculated as 2.5% of the total axial load applied to the column. This shear force is then distributed equally among the parallel planes of the lacing system to ensure the stability and monolithic behavior of the entire built-up member.
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