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- CROSS-AUS Newsletter 8 (1)
- CROSS-UK Newsletter 1 (3)
- CROSS-UK Newsletter 2 (1)
- CROSS-UK Newsletter 3 (1)
- CROSS-UK Newsletter 5 (1)
- CROSS-UK Newsletter 6 (2)
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- CROSS-UK Newsletter 18 (1)
- CROSS-UK Newsletter 23 (7)
- CROSS-UK Newsletter 25 (2)
- CROSS-UK Newsletter 29 (1)
- CROSS-UK Newsletter 32 (2)
- CROSS-UK Newsletter 34 (1)
- CROSS-UK Newsletter 35 (1)
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- CROSS-UK Newsletter 39 (1)
- CROSS-UK Newsletter 41 (1)
- CROSS-UK Newsletter 42 (3)
- CROSS-UK Newsletter 43 (1)
- CROSS-UK Newsletter 44 (1)
- CROSS-UK Newsletter 52 (1)
- CROSS-UK Newsletter 54 (1)
- CROSS-UK Newsletter 56 (2)
- CROSS-UK Newsletter 58 (1)
- CROSS-UK Newsletter 59 (1)
- CROSS-UK [sub-heading only] (37)
- CROSS-US Newsletter 1 (2)
- CROSS-US Newsletter 2 (2)
- CROSS-US Newsletter 3 (2)
- CROSS-US [sub-heading only] (4)
- CROSS Newsletter (17)
- CROSS Safety Alert (2)
- CROSS Safety Report (74)
- CROSS Theme Page (1)
- CROSS Topic Paper (1)
- 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
Roof collapse of warehouse structure under rainwater ponding
This report highlights the structural risk caused by rainwater ponding on relatively flat roofs.
10 May 2021
CROSS Safety Report
Report ID: 969
Region: CROSS-US
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
Incorrect use of software for wind loads on solar panels
A reporter is concerned about designers relying completely on the output of software for structural analysis when they do not fully understand the requirements for data input.
7 November 2023
CROSS Safety Report
Report ID: 1212
Region: CROSS-AUS
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
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
Channel slab roof deck collapse during reroofing
This report highlights the structural risk caused by machinery during reroof a project.
10 May 2021
CROSS Safety Report
Report ID: 970
Region: CROSS-US
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
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