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- CROSS-UK Newsletter 6 (1)
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CROSS regions
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
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
Inadequate design submissions for alterations to an existing building
An upper storey extension was designed without considering the effect on the structure below.
10 March 2022
CROSS Safety Report
Report ID: 1085
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
Flaws with partial encasements around steel columns
A structural assessment found that steel columns encased in concrete to mid-storey height were heavily corroded directly above the top of the encasements.
1 January 2016
CROSS Safety Report
Report ID: 517
Region: CROSS-UK
Lack of masonry wall ties causes failure
A reporter states that they have come across the presence of serious defects in masonry construction in the past and have no doubt that many other engineers have had similar experiences.
1 April 2018
CROSS Safety Report
Report ID: 665
Region: CROSS-UK
Coliseum failure
This is a legacy case study of the 1978 collapse of the roof of the Hartford Coliseum in Hartford, Connecticut.
1 March 2020
CROSS Safety Report
Report ID: 892
Region: CROSS-US
Disproportionate collapse assessment of large panel system buildings
A reporter has become concerned by the approach being taken by some engineers to assess the risk of disproportionate collapse due to fire in large panel system (LPS) buildings.
1 January 2020
CROSS Safety Report
Report ID: 885
Region: CROSS-UK
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