CROSS Safety Report
Cladding fixed to stainless steel
This report is over 2 years old
Cladding panels fixed to a stainless steel supporting angle with stainless steel screws failed.
Key Learning Outcomes
For civil and structural design engineers:
Connections can often be the weak link in structures and attention to detail is required
Careful consideration is required for connections, particularly at interfaces between different materials. The role of tolerances should not be overlooked
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A problem occurred with the failure of some cladding panels fixed to a stainless steel supporting angle with stainless steel screws. According to the reporter stainless steel strain hardens very rapidly and self-tapping screws bind up. On this occasion large pilot holes had been drilled and the screws were so loose that they unwound with air pressure fluctuations on the cladding allowing the cladding panels to fall off.
Expert Panel Comments
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CROSS has previously received reports on problems with stainless steel in structural situations and further examples will be welcome.
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