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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
Actively seeking to identify hazards
A reporter investigating a near miss incident raises concerns that an active prompt to seek out hazards is not being undertaken on innovative construction design and methods.
1 April 2016
CROSS Safety Report
Report ID: 530
Region: CROSS-UK
Concrete grade confusion in software
A reporter noticed that the design calculation report generated by a proprietary software package called for ‘concrete characteristic strength = 45N/mm2’, but did not confirm whether this refers to the cylinder or cube strength.
1 April 2019
CROSS Safety Report
Report ID: 788
Region: CROSS-UK
Fire protection of mixed hot/cold rolled steel structure
This report describes how a high-rise building had to be remediated after it was found there was insufficient fire protection encasement of structural elements.
1 July 2020
CROSS Safety Report
Report ID: 921
Region: CROSS-UK
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