Author: The Institution of Structural Engineers
1 February 2012
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The Institution of Structural Engineers
Imposed load is defined as the load that is applied to the structure that is not permanent and can be variable. In Eurocode phraseology, it is described as a 'quasi-permanent variable action'. Please be aware that this note does not cover lateral loads onto barriers, balustrades and axle loads from vehicles. These will be covered in a forthcoming note. (This article was updated in October 2016 to reflect errata issued since its original publication.)
This Technical Guidance Note defines the concept of fatigue and how its effects can be countered.
Elements within a steel frame structure are at risk of buckling under load. If measures are not taken when designing steel elements that recognise this risk, then the likelihood of its failure is significantly increased. This Technical Guidance Note explains how steel elements are restrained against buckling and what the structural engineer should consider when analysing steel structures with respect to buckling resistance.