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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
Failure of metal cladding panels on bridges
This report discusses the findings of an investigation into the causes of the failure of metal cladding panels on a bridge parapet and provides recommendations concerning the use of pop rivets to fix such panels.
23 February 2024
CROSS Safety Report
Report ID: 944
Region: CROSS-UK
Connection fixity considerations for steel frame modelling
This report concerns the modelling of joints when using computer programs. In some cases, engineers are applying rotational releases to joints in models but subsequently designing the connections as rigid. This leaves a fundamental mismatch between analysis and design which may lead to unsafe structural connections argues a reporter.
17 November 2022
CROSS Safety Report
Report ID: 1139
Region: CROSS-UK
Cantilever bridge parapet falsework failure
A reporter has experienced the failure of cantilever parapet falsework twice, for different reasons, using two different products during bridge construction.
20 February 2023
CROSS Safety Report
Report ID: 1159
Region: CROSS-UK
Fall of bridge deck support due to bolt over-tightening
A 7t steel frame designed to temporarily support part of a bridge deck during bearing refurbishments work fell from height as it was about to be lowered some 21m to the ground.
1 January 2011
CROSS Safety Report
Report ID: 216
Region: CROSS-UK
Concern about bridge hangers
A reporter is concerned that a failure in recent years involving the cast connections at each end of vertical bars, which connected to a bow string arch at one end and to a bridge deck at the other, may be in use elsewhere.
1 July 2012
CROSS Safety Report
Report ID: 222
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
Wrong length blind bolts lead to unsafe bridge structure
Bridge strengthening being carried out using blind bolts left a structure in an unsafe condition with traffic loading on it.
20 February 2023
CROSS Safety Report
Report ID: 1185
Region: CROSS-UK
Misleading instructions for a structural component
A reporter confirms the difficulty encountered whilst endeavouring to ensure cast-in insulated connectors supporting a parapet wall and balustrade were properly fixed.
26 August 2022
CROSS Safety Report
Report ID: 1127
Region: CROSS-UK
Documentation for imported large diameter steel pins
A reporter raises concerns over the possibility that foreign steel with poor, confusing or misleading documentation, is being used on safety critical structures in the UK.
1 January 2013
CROSS Safety Report
Report ID: 299
Region: CROSS-UK
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