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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
Vegetation damage to railway arches
Lack of clarity as to maintenance responsibilities leads to degradation of railway arches.
6 June 2022
CROSS Safety Report
Report ID: 1064
Region: CROSS-UK
Understanding finite element analysis for pile caps
A reporter questions the validity of using two-dimensional finite element (2D FE) shells to model structural elements such as pile caps.
18 October 2023
CROSS Safety Report
Report ID: 1152
Region: CROSS-UK
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
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
Poor quality design leads to failure for a small design and build contract
An example of a small design and build contract where poor design and management led to an inadequate structure being built.
6 June 2022
CROSS Safety Report
Report ID: 1088
Region: CROSS-UK
Masonry panels rock in wind due to missing wall ties
Wall ties designed to connect masonry partitions to adjacent steelwork framing were not installed leaving the masonry walls unrestrained. Walls were seen to be rocking in high winds.
17 February 2023
CROSS Safety Report
Report ID: 931
Region: CROSS-UK
Incorrectly installed tension control bolts could have led to serious consequences
A reporter finds incorrectly installed system HRC preload bolt assemblies, better known as tension control bolts, during a site inspection of a new highway bridge over a railway. The incorrectly fitted bolts could have had major structural implications, and led to other safety risks, if the installation error had not been spotted.
24 May 2023
CROSS Safety Report
Report ID: 1196
Region: CROSS-UK
Concerns over corrosion of dissimilar metals in fixing cavity wall tie systems
A reporter is concerned about corrosion that may occur between dissimilar metals that can be used in cavity wall tie systems. The reporter has noted that stainless steel and carbon steel may be fixed together in wall cavities, which are damp environments, and that corrosion of dissimilar metals in contact may occur.
24 May 2023
CROSS Safety Report
Report ID: 1186
Region: CROSS-UK
Frustration about getting a response to a public safety concern
A member of the public reported a partially collapsed retaining structure to bodies they believed could be the responsible authority. Despite continued efforts to get attention to the issue, there was no apparent action to address the concern. This raised the reporter’s concern for public safety.
20 February 2023
CROSS Safety Report
Report ID: 1154
Region: CROSS-UK
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