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- CROSS-UK Newsletter 8 (1)
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CROSS regions
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
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
Fire involving fluorescent light fitting
A fire involving a fluorescent light fitting occurred in a corridor in a sheltered housing complex.
21 August 2023
CROSS Safety Report
Report ID: 1157
Region: CROSS-UK
Partial collapse of a shopping mall roof under drifting snow
Partial collapse of a shopping mall roof under drifting snow caused by lack of building code provisions for drifting snow and poor fabrication of open web steel joists.
2 May 2023
CROSS Safety Report
Report ID: 1009
Region: CROSS-US
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
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
Roof collapse at a social club
This is a report about a roof collapse that occurred, in about 1985, because only half as many parallel faced timber roof trusses were installed as there should have been.
30 June 2022
CROSS Safety Report
Report ID: 942
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
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
Roof collapse of warehouse structure under rainwater ponding
This report highlights the structural risk caused by rainwater ponding on relatively flat roofs.
10 May 2021
CROSS Safety Report
Report ID: 969
Region: CROSS-US
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