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CROSS regions
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
Corrosion concerns on a pedestrian bridge
A reporter is concerned about a pedestrian bridge that may have reduced load capacity due to corrosion at the root of cantilever supports.
17 February 2023
CROSS Safety Report
Report ID: 1161
Region: CROSS-UK
Unsafe design of retrofit cantilever balconies
A structural assessment of a number of new balconies being added to an existing building revealed critical concerns in respect of fixings back into the existing brickwork.
26 August 2022
CROSS Safety Report
Report ID: 1128
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
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
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
Freeze and thaw of another RHS
Further to reports about the freezing of water in hollow sections a correspondent has sent photos of a section of mild steel RHS that was removed from a bridge and shows the bulging that can occur.
1 January 2015
CROSS Safety Report
Report ID: 485
Region: CROSS-UK
Freeze/thaw effects on RHSs and unexpected hydrogen generation
A reporter provides their views of the freezing effects on rectangular hollow sections (RHSs) and how this could be related to Liquid Metal Assisted Cracking.
1 October 2014
CROSS Safety Report
Report ID: 434
Region: CROSS-UK
Further issues with freezing and galvanised hollow sections
A reporter was involved in correcting a cold formed galvanised square hollow section (SHS) four storey balcony structure where longitudinal splits formed in at least two of the four columns.
1 January 2014
CROSS Safety Report
Report ID: 314
Region: CROSS-UK
Freezing splits galvanised SHS columns
Concerns were raised after several square hollow section members split vertically on a partially complete construction site.
1 April 2012
CROSS Safety Report
Report ID: 253
Region: CROSS-UK
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