The person supervising the erection, dismantling or alteration of a scaffold and the workers taking part have at their disposal the manufacturer’s instructions or the erection and dismantling plan, including any instructions they may contain.
Where the scaffolding is erected in accordance with the manufacturer’s instructions, it is erected in accordance with the calculation note referred to in those instructions.
Where this calculation note is not available or the structural configurations envisaged are not provided for in it, a strength and stability calculation is carried out by a competent person.
Where the envisaged configuration of the scaffolding does not correspond to an assembly provided for in the instructions, an assembly, use and dismantling plan is drawn up by a competent person.
These documents are kept at the workplace.