Reinforced Autoclaved Aerated Concrete planks  (RAACs)
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Reinforced Autoclaved Aerated Concrete planks (RAACs)

Date published

Reinforced autoclaved aerated concrete (RAAC) is a form of lightweight concrete sometimes referred to as panels. It was used primarily in roof planks of some public buildings built between the mid-1950s and mid-1990s.


Why was this study group formed?

Following failures in reinforced autoclaved aerated concrete (RAAC) planks/panels, SCOSS issued an alert along with reports of failures to CROSS. This led to the Institution setting up this study group to provide a place for information and guidance on RAAC. You do not need to be a member of the Institution in order to join the study group - it is open to all.
Join the group to receive updates     Further information on RAAC


IStructE Resources

Related Resources


Local Government Association         - Information on Reinforced Autoclaved Aerated Concrete (RAAC)

Health and Safety Executive (HSE)   -  Advice regarding schools and education

CROSS Report 908                             -  Failure of RAAC planks in schools

You can confidentially share your experiences on RAAC planks with CROSS


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