Managing Health & Safety Risks (No. 50): Stability

Author: The Institution of Structural Engineers’ Health and Safety Panel

Date published

1 May 2016

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Managing Health & Safety Risks (No. 50): Stability

The Structural Engineer
Author

The Institution of Structural Engineers’ Health and Safety Panel

Date published

1 May 2016

Author

The Institution of Structural Engineers’ Health and Safety Panel

Price

Standard: £9 + VAT
Members/Subscribers: Free

Buy Now

A check on stability is required for all structures in both their permanent and temporary states. An unstable structure is one that can begin to displace significantly under a small disturbing force and where further gross displacement follows any initial displacement. Reported failures have usually arisen because the parties involved just failed to consider the possibility. Many failures have occurred during construction when elements of the structures are necessarily not interconnected, or in building refurbishment/demolition when stabilising elements have inadvertently been removed out of sequence.


The forces that may cause instability are often unclear, but as a general principle, anything in its temporary or permanent condition should be considered to have an applied horizontal force acting. For external structures, an obvious force is wind. A clear danger for internal structures is the absence of wind, which leads to the possibility that a destabilising force will be overlooked.

Additional information

Format:
PDF
Pages:
2
Publisher:
The Institution of Structural Engineers

Tags

Managing Health & Safety Risks Professional Guidance Issue 5

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