- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 20 Nov 2020
Failure of cast iron beams
Many buildings utilising cast iron (CI) continue to give good service with adequate reliability when used in a risk assessed manner and current best practice documents. As is normal with this type of beam, there is rarely any apparent warning of imminent collapse.
- Additional loading on a CI beam, typically arising from further deadweight added since original completion. The unregulated increase of load on a structure should always be a matter of concern.
- Long-standing ingress of water leading to corrosion, deterioration of the concrete infill, and loss of any composite action. Extended basements or roof garden arrangements are particularly prone to this action.
- The beams working at high levels of stress as originally installed. This is more likely in a domestic structure where the beam may have been sized by rule of thumb.
Professionals working in this field, or with clients responsible for property of this type and era, should be aware of these issues and be ready to advise the relevant parties of the need for a structural risk assessment if the identified conditions exist.
 Related articles on Designing Buildings Wiki
- Brittle fracture.
- Cast iron.
- Conservation of Architectural Ironwork.
- Defects in construction.
- Degradation of construction materials.
- Failure of metals.
- Flat roof defects.
- Roofing defects.
- Structural failures.
- Structural steelwork.
- Weathering steel.
Featured articles and news
What will it take to stop it ?
To celebrate world bee day 2022 !
Not forgetting part F and the new part overheating part O.
As energy prices jump up in cost.
With people in the UK from Ukraine.
Industry leader Steve Murray takes on role.
An abundant and versatile building material.
600,000 heat pump installations targeted per year by 2028.
Helping prevent those unwanted outcomes.
How has transport changed due to Covid-19 ?
Will you need it ? after June 15 and the new Part O ?
Create an account and write the first of many articles.
CIAT commentary after the first meeting.
Who is to blame?
Research recommends focussing on portfolio success rather than project success.
The revised standard for mapping underground utilities.
Cross-industry steering group seeks support in delivery.