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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
Collapse of folded plate timber roof at a school
This report is about a critical safety issue concerning folded timber roofs, in various settings, including over school halls.
18 October 2023
CROSS Safety Report
Report ID: 1160
Region: CROSS-UK
Frustration about getting a response to a public safety concern
A member of the public reported a partially collapsed retaining structure to bodies they believed could be the responsible authority. Despite continued efforts to get attention to the issue, there was no apparent action to address the concern. This raised the reporter’s concern for public safety.
20 February 2023
CROSS Safety Report
Report ID: 1154
Region: CROSS-UK
RAAC planks in a 1970s shopping centre
An existing large shopping centre built circa 1975 had a number of external storerooms and loading bays with roofs constructed using reinforced autoclaved aerated concrete (RAAC) planks. The planks had deflected to the extent that they needed replacing.
20 February 2023
CROSS Safety Report
Report ID: 1155
Region: CROSS-UK
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
Collapse of unusual hybrid concrete and steel strand truss on school roof
This report concerns the collapse of a school hall roof which resulted from the failure of one of a number of unusual hybrid concrete and steel strand trusses. The trusses consist of a precast reinforced concrete top chord and verticals with a bottom chord of tensioned steel strands. The failure of the truss resulted in the collapse of the supported flat roof local to the failed truss, and da...
25 May 2023
CROSS Safety Report
Report ID: 1227
Region: CROSS-UK
Scottish tenements
A reporter raises concerns about carrying out alterations to old tenement buildings in Scotland.
1 July 2006
CROSS Safety Report
Report ID: 26
Region: CROSS-UK
Flaws with partial encasements around steel columns
A structural assessment found that steel columns encased in concrete to mid-storey height were heavily corroded directly above the top of the encasements.
1 January 2016
CROSS Safety Report
Report ID: 517
Region: CROSS-UK
Emergency motorway lane closure during concrete repairs
This report highlights how confusion during concrete repair works led to an unplanned emergency lane closure of a bridge carrying a motorway.
1 July 2020
CROSS Safety Report
Report ID: 926
Region: CROSS-UK
Reinforced autoclaved aerated concrete roof planks - sharing experiences
A reporter has surveyed a number of buildings with reinforced autoclaved aerated concrete (RAAC) roof planks and wants to share their experiences to help others.
1 April 2020
CROSS Safety Report
Report ID: 874
Region: CROSS-UK, CROSS-AUS, CROSS-US
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