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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
Failure of cantilevered stone staircase
During the renovation and change-of-use conversion of a former minor stately home built around 1830, under pedestrian loading, a ‘cantilevered’ stone staircase partially collapsed without warning.
21 February 2023
CROSS Safety Report
Report ID: 1147
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
Temporary movement joint in slabs not installed correctly
Dowels in temporary movement joints for a slab were not installed correctly, impacting the structural behaviour.
29 March 2021
CROSS Safety Report
Report ID: 998
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
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
Precast concrete planks - durability and potential safety concerns
A reporter raises concerns over the recent collapses of precast concrete floor units that are installed throughout the UK.
1 April 2007
CROSS Safety Report
Report ID: 77
Region: CROSS-UK
Multi-storey car parks - structural condition concerns
A reporter raises concerns about the structural condition of a number of car parks that they have worked on as remediation projects.
1 April 2012
CROSS Safety Report
Report ID: 265
Region: CROSS-UK
Balcony construction defects of residential flats
A reporter's firm have been undertaking structural assessments of cantilevered reinforced concrete walkways, which in the majority of cases have been found to be under strength.
1 April 2014
CROSS Safety Report
Report ID: 435
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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