Author: Chris O'Regan
1 April 2020
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This Technical Guidance Note explains how rolled steel I and H-sections are designed to resist torsion.
A specialist contractor design item that is usually outside the responsibility of the structural engineer. However, in order to assess a truss design, the engineer needs to understand the theory underpinning it.
Portal frames are a simple and very common type of framed (or skeleton) structure. Steel portal frames, in particular, are a cost-effective structural system to support building envelopes requiring large column-free spaces.