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Question 832 September 2014

Cuplock Scaffold system - control

We recently had a potentially serious incident involving a Cuplock scaffold system. While striking the scaffold a contractor accidentally dislodged a cross member, which then swung down striking another scaffolder at ground level. Thankfully serious injury was avoided but the potential was there.

The concern from our point of view is that the Cuplock system used has inherent weaknesses in design, at times during erection/striking sections are only resting on the cup and can be dislodged. In addition to this the cross members are pivoted on either end allowing them to swing like a pendulum if the top end was knocked (as it did in this case).

I accept that this type of system is common place and has been in use for many years but we would be interested in any other members experience with Cuplock scaffolds and if they take any steps to control or limit the use of such systems.


The following company answered this question:

  • Scottish Power plc

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