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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
Rotting of cross-laminated timber (CLT) roof panels
This report highlights how a reporter discovered rotted CLT roof panels during the investigation of a roof that had been leaking for a few years.
1 October 2019
CROSS Safety Report
Report ID: 852
Region: CROSS-UK
Concrete encasement falls from bridge girder
Concerns were raised after sections of concrete from the bottom flange of a single encased girder became detached and fell onto an operational line.
1 July 2016
CROSS Safety Report
Report ID: 559
Region: CROSS-UK
Defects in wrought iron girder from 1879
Defects were found in the strut members of a three span wrought iron girder from 1879 while major strengthening and refurbishment works were being carried out.
1 April 2016
CROSS Safety Report
Report ID: 570
Region: CROSS-UK
Further report on freezing of water in hollow sections
A reporter has a further warning on the issue of freeze/thaw cracking following report 434 after their firm encountered a similar problem on a UK project and investigated the matter.
1 January 2017
CROSS Safety Report
Report ID: 579
Region: CROSS-UK
Square Hollow Section (SHS) expansion due to freezing
A reporter has come across problems in British Columbia (temp range -30 degrees to +40 degrees) of cracking to square hollow sections (SHS) due to the ingress of water and freezing.
1 April 2017
CROSS Safety Report
Report ID: 641
Region: CROSS-UK
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