Technical Guidance Note (Level 2, No. 25): Designing for torsion in reinforced concrete elements

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.