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- CROSS-UK Newsletter 6 (1)
- CROSS-UK Newsletter 25 (1)
- CROSS-UK Newsletter 58 (1)
- CROSS-UK Newsletter 59 (1)
- CROSS-UK [sub-heading only] (2)
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- Third party content (3)
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
Reinforced autoclaved aerated concrete in roofing in schools
This document is for building owners to help them to identify the presence of reinforced autoclaved aerated concrete (RAAC) and to check whether any further investigation or action is needed.
10 February 2021
Third party content
Publisher: Department for Education
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
Structural failure of older timber connections
A reporter shares three examples of the structural failure or inadequacies of connections in existing timber structures that they have encountered.
13 December 2021
CROSS Safety Report
Report ID: 1040
Region: CROSS-UK
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
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
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
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
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
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