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- CROSS-AUS Newsletter 8 (1)
- CROSS-UK Newsletter 1 (3)
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- CROSS-UK [sub-heading only] (36)
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CROSS regions
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
Photovoltaic installations - structural aspects
CROSS has concerns about some structural aspects of roof mounted PV and solar thermal panels.
1 November 2016
CROSS Safety Alert
Region: CROSS-UK, CROSS-AUS, CROSS-US
Overloading a portal frame with suspended services
A reporter designing a single storey portal frame used a standard roof service loading of 0.25kN/m2. After the project was completed, a tenant for the unit took over fit out and added a considerable amount of sprinkler pipework into the roof. This created local overloading.
21 August 2023
CROSS Safety Report
Report ID: 1195
Region: CROSS-UK
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
Durability issues with engineered timber
A reporter has observed durability issues with engineered timber when there is water ingress or condensation issues. It appears to disintegrate significantly more than a conventional timber, resulting in structural failure rather than distortion.
21 February 2024
CROSS Safety Report
Report ID: 1275
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
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
Condition assessments of exposed lightweight canopy roofs
Defects in lightweight canopy roofs, using underslung roofing sheets in many cases.
14 October 2022
CROSS Safety Report
Report ID: 1084
Region: CROSS-AUS
Apparently simple home improvement work leads to dangerous situation
Apparently simple home improvement work, consisting of reroofing and a loft conversion, resulted in a 'near miss' with potentially dangerous conditions for neighbours.
21 August 2023
CROSS Safety Report
Report ID: 1173
Region: CROSS-UK