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- CROSS-UK Newsletter 1 (3)
- CROSS-UK Newsletter 2 (1)
- CROSS-UK Newsletter 3 (1)
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- CROSS-UK Newsletter 6 (2)
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- CROSS-UK Newsletter 23 (7)
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- CROSS-UK Newsletter 29 (1)
- CROSS-UK Newsletter 32 (2)
- CROSS-UK Newsletter 34 (1)
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- CROSS-UK Newsletter 42 (3)
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- CROSS-UK Newsletter 56 (2)
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- CROSS-UK [sub-heading only] (36)
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- News [sub-heading only] (10)
- Safety information from CROSS [sub-heading only] (2)
- Safety information [sub-heading only] (1)
- Third party content (3)
- 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
Painted faying surfaces leads to connections with insufficient load capacity
Painted, rather than the required unpainted connection faying surfaces, were identified by the Resident Engineer of a reporter's firm during the erection of a primary frame for a large project. The painted surfaces resulted in the connections not having sufficient load carrying capacity and necessitated remedial works.
20 November 2023
CROSS Safety Report
Report ID: 896
Region: CROSS-UK
Safety issues when adding PV panels to existing roofs
A reporter raises concerns over the lack of structural engineering knowledge and dangerous assumptions, that they have seen, in assessments for the installation of photovoltaic (PV) panels for a number of buildings.
13 December 2021
CROSS Safety Report
Report ID: 1015
Region: CROSS-UK
Roof collapse at a social club
This is a report about a roof collapse that occurred, in about 1985, because only half as many parallel faced timber roof trusses were installed as there should have been.
30 June 2022
CROSS Safety Report
Report ID: 942
Region: CROSS-UK
Snow drift implications due to building extension
Part of a roof collapsed in a factory and warehouse facility shortly after a storm event due to snow drift loads.
13 December 2022
CROSS Safety Report
Report ID: 947
Region: CROSS-UK
Storm damage to pressed metal roof covering
A modern dwelling with two separate V-shaped roofs sustained damage to the standing seam pressed metal roof covering during two separate weather events.
23 February 2024
CROSS Safety Report
Report ID: 952
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
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
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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