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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
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
Collapse of proprietary timber roof
A proprietary timber roof system spanning 8m over a school hall collapsed. The roof was constructed in 1959, and formed from a ply-web beam system, with hardboard ceiling and ply deck and asphalt covering.
1 January 2012
CROSS Safety Report
Report ID: 273
Region: CROSS-UK
School roof timber truss collapse
A gym/assembly hall roof to a school collapsed suddenly and without warning overnight when fortunately the building was unoccupied.
1 January 2012
CROSS Safety Report
Report ID: 249
Region: CROSS-UK
Wall collapse from building in city centre - who is responsible?
A 4-4.5m high wall, approximately 18m long, and nearly 40t of bricks collapsed into a road crushing three empty vehicles.
1 January 2013
CROSS Safety Report
Report ID: 306
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
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
Aerated concrete slabs
A reporter discusses the failure of precast reinforced autoclaved aerated concrete (RAAC) slabs during construction.
1 October 2007
CROSS Safety Report
Report ID: 55
Region: CROSS-UK, CROSS-AUS, CROSS-US
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
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