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CROSS regions
Underpinning using screw piles
A reporter is concerned that inclined screw piles used for underpinning may be subjected to significant bending moments that compromise their capacity.
7 November 2023
CROSS Safety Report
Report ID: 1175
Region: CROSS-AUS
Failure of reinforced autoclaved aerated concrete (RAAC) planks
In late 2018, the Local Government Association (LGA) and the Department for Education (DfE) contacted all school building owners to draw attention to a recent failure involving a flat roof There was little warning of the sudden collapse.
1 May 2019
CROSS Safety Alert
Region: CROSS-UK, CROSS-AUS, CROSS-US
Risk of failure of untested vibration isolators with seismic restraint
Risk of failure of vibration isolators with integral seismic restraint being used without independent third party testing
7 November 2023
CROSS Safety Report
Report ID: 1230
Region: CROSS-AUS
Production of as-constructed drawings
The reporter is concerned about who should be responsible for producing accurate “as-constructed” drawings. The reporter’s experience is that the as-constructed drawings are typically likely to be incomplete and contain errors.
14 October 2022
CROSS Safety Report
Report ID: 1056
Region: CROSS-AUS
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
Safety concern about the design of thin concrete walls
The reporter raises their concern about the design of thin concrete load-bearing walls, sometimes supporting 10 or more storeys.
1 July 2019
CROSS Safety Report
Report ID: 815
Region: CROSS-AUS
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
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
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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