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Built Up Columns - Lacing

Two ISMC 400 ...

Question

Two ISMC 400 channels are placed back to back at a spacing of 250 mm to carry an axial load of 800 kN.The lacing system should be designed to resist a transverse shear of_____________kN.

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Solution

The lacing system is designed for a load which is 2.5% of the axial load i.e
$P_{d e s i g n} = \frac{2.5}{100} \times 800 = 20 k N$

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