In these circumstances, consider using properly installed personnel equipment such as rope access or boatswain's chairs. If, for the same reasons these methods of work cannot be used, it will be necessary to consider equipment which will arrest falls, ie safety harnesses or nets with associated equipment. Scaffolds, personnel harnesses and net equipment have to be erected or installed under the supervision of a competent person. The first objective is to prevent materials or objects from falling in circumstances where they could strike someone. Only where it is not reasonably practicable to do so, should other means, eg covered walkways, be used.
Every year there are structural collapses which have the potential to cause serious accidents.
The CHSW Regulations set a high standard to prevent collapses which involves taking into account the hazard during the planning stage. Demolition or dismantling are recognised as high risk activities. In any cases where this work presents a risk of danger to anyone, it should be planned and carried out under the direct supervision of a competent person. From the outset, and as work progresses, any excavation which has the potential to collapse unless supported, should have suitable equipment immediately available to provide such support. Underground cables and services can also be a source of danger.