Quiz: Advantages Of Closed Sections In Torsion & Compression

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Torsion occurs when a load acts somewhere other than a shape’s centroid.*

Open shapes with torsional loads are subject to the following stresses:*

An advantage of circular sections is that they will not warp.*

For closed sections, even rectangular sections experience such a small amount of warping that it is negligible.*

Shear stresses due to warping:*

For efficiency of torsional resistance, round shapes are the best, followed closely by rectangular shapes; open sections are a distant third.*

Open sections are quite poor in torsional strength, but it is relatively simple to find their torsional capacity.*

The equation for torsional capacity of a closed section depends on whether it is hollow or solid.*

The torsional resistance of a closed steel section is much higher than a similarly-sized concrete member.*

A1065 material can give greater column capacities because:*