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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
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
Overall stability of building proposed to be provided by metal framing and plasterboard
Metal framing and plasterboard was used to provide lateral stability to a building. The form of construction was later deemed to be unsuitable and extensive remedial works had to be carried out.
24 May 2023
CROSS Safety Report
Report ID: 468
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
Rotting plywood decking on grandstand
During visual structural inspections of temporary demountable grandstands, a walkway board failed when it was walked on.
31 May 2022
CROSS Safety Report
Report ID: 1092
Region: CROSS-UK
Light gauge steel fabrication
Referring to Report AUS-4, Light steel truss issues, this reporter has concerns about the low ductility of the high tensile steel, in particular with respect to connection design and capacity.
1 August 2020
CROSS Safety Report
Report ID: 957
Region: CROSS-AUS
Light steel truss issues
A reporter believes that greater awareness is needed of deficiencies in the light steel truss industry (trusses made from cold-formed steel sections).
1 February 2020
CROSS Safety Report
Report ID: 817
Region: CROSS-AUS
Dislodged finger plate on highway bridge
A correspondent received a report about a 1.5m long section of a steel finger plate expansion joint on a highway bridge that had been inadequately fixed and became dislodged.
1 February 2020
CROSS Safety Report
Report ID: 879
Region: CROSS-AUS
Bridge bearing design and installation - further concerns raised
A reporter says that the issue of successful co-ordination between designers, contractors and specialist bearing suppliers is one they have experienced.
1 January 2019
CROSS Safety Report
Report ID: 796
Region: CROSS-UK
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