Descriptors | Safety engineering, Occupational safety, Safety measures, Emergency measures, Accident prevention, Rescue, Rescue equipment, Underground, Lighting systems, Safety harnesses, Breathing apparatus, Construction equipment, Lifting equipment, Hoists, Passenger hoists, Air compressors, Personnel, Construction workers, Training, Communication equipment, Hazards, Working conditions (physical), Industrial accidents, Piling, Site investigations, Construction operations, Foundations, Pile foundations, Trenches, Access, Barriers, Guard rails, Restraint systems (protective), Hoisting cages, Dangerous materials, Toxic materials, Earthworks |