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Gareth Chester  
#1 Posted : 14 May 2018 11:30:35(UTC)
Rank: New forum user
Gareth Chester

can anyone help with a scaffold design / tie question. 

we have a demolition scaffold on site its designed to TG20. The design says that the scaffold can be ties at alternative lifts (every 4m) it also says that the top lift needs to be tied in. 

The problem I have is that in this case the design contradicts itself, as it’s a demolition scaffold, as the wall is being demolished by hand the scaffold will be struck and the top lift (the working lift) will keep changing. 

I’m only asking as I’ve asked the scaffolder why he hasn’t tied the top lift in.  and he said it doesn’t need to be. As there will always be a lift that is not tied in so it won’t matter.

Can anyone advise please??

#2 Posted : 14 May 2018 11:59:18(UTC)
Rank: Forum user


A working scaffold shall have a support or foundation capable of resisting the design loads and limiting movement. Lateral stability of the scaffold structure as a whole and locally shall be verified when subjected to the different design forces, for example from the wind.

Lateral stability can be provided by tie members to the adjacent building or structure. Alternatively other methods, such as guy ropes, kentledge or anchors may be used.

It may be necessary to remove individual ties temporarily in order to carry out work on the structure. In such a case removal of the ties should be taken into consideration in the design. The designer should provide a design risk assessment identifying the residual risk which remains in line with the principles of prevention and a risk assessment/method statement  should be prepared specifying the sequence for removal and replacement of ties.

I hope that helps.

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