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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
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
Quality of design and construction of a major bridge structure
This report concerns the design and installation of the bridge bearing zones on a new prestressed precast concrete viaduct.
1 October 2018
CROSS Safety Report
Report ID: 781
Region: CROSS-UK
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
Design and erection of prefabricated (precast) concrete
A correspondent considers that there should always be an experienced temporary works designer for prefabricated concrete structures as many structural engineers do not consider the erection methodology when designing such structures.
1 February 2020
CROSS Safety Report
Report ID: 871
Region: CROSS-AUS
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