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Reinforced aerated autoclaved concrete planks found on pitched roof of 1990s hospital building
A building constructed in the early 1990s has been found to contain reinforced aerated autoclaved concrete (RAAC) planks. This date is important since it is much later than the previously thought last significant use of RAAC in buildings in the UK and potentially affects the scope of buildings that could require screening for RAAC problems.
26 August 2022
CROSS Safety Report
Report ID: 1125
Region: CROSS-UK
IStructE publishes investigation and assessment of RAAC panels
The IStructE has published guidance that provides identification and remediation solutions for Reinforced Autoclaved Aerated Concrete (RAAC) planks.
15 March 2022
Third party content
Publisher: The Institution of Structural Engineers
RAAC assessment undertaken by persons not suitably experienced
A reinforced aerated autoclaved concrete (RAAC) assessment was carried out by persons who did not appear to have appropriate experience, potentially putting building users at risk of harm.
21 August 2023
CROSS Safety Report
Report ID: 1224
Region: CROSS-UK
IStructE RAAC Study Group & members with RAAC experience
The IStructE have formed a RAAC Study Group and created a list of professionally registered structural engineers who have experience of providing solutions for managing RAAC planks.
15 June 2021
Third party content
Publisher: The Institution of Structural Engineers
Construction period of RAAC planks
A reporter says that there are structural issues with reinforced autoclaved aerated concrete (RAAC) panels installed in a building as late as 1998. This date is significantly later than previous reports suggest as the last significant use of RAAC elements in the UK.
20 February 2023
CROSS Safety Report
Report ID: 954
Region: CROSS-UK
Long term risks for ground anchors
A reporter is concerned about the inspection and maintenance of ground anchors that are used for strategic flood defences.
1 October 2007
CROSS Safety Report
Report ID: 87
Region: CROSS-UK
Precast concrete canopies in housing
A reporter warns that precast concrete cantilever canopies which are slender and monolithic with lintels over entrance doorways can be vulnerable to sudden collapse.
1 January 2009
CROSS Safety Report
Report ID: 126
Region: CROSS-UK
Failure of RAAC planks in schools
A reporter was asked to investigate a reinforced autoclaved aerated concrete (RAAC) roof which had collapsed in a school.
1 April 2020
CROSS Safety Report
Report ID: 908
Region: CROSS-UK, CROSS-AUS, CROSS-US
Disproportionate collapse assessment of large panel system buildings
A reporter has become concerned by the approach being taken by some engineers to assess the risk of disproportionate collapse due to fire in large panel system (LPS) buildings.
1 January 2020
CROSS Safety Report
Report ID: 885
Region: CROSS-UK
Structural safety of reinforced autoclaved aerated concrete (RAAC) planks
A Theme Page to raise awareness of and encourage knowledge sharing on the structural safety of RAAC planks.
CROSS Theme Page
Region: CROSS-UK, CROSS-AUS, CROSS-US
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