Plan the steps of work and supply adequate materials and tools accordingly.
The work area must remain clean at all time without things obstructing the working area and it must be well ventilated.
Place warning sings and surround dangerous areas with barriers preventing the entrance.
Stop all type of work with extremely bad climate conditions.
All holes must be protected by a fence.
Everything must be signposted.
Every worker has to know the safety rules and wear his safety equipment at all time.