Hazardous atmosphere Trapped pressure Overhead hazards Noise
Open flames or arcs Crane operation Dangerous chemicals (MSDS) Dust
Flying hot particles or sparks Ionizing radiation Excavation collapse
Extreme temperature Danger of falling Flammables / Combustibles / Explosives
Safety systems disabled Electricity Adjacent operation (co-activity)
Heavy loads (lifting) Engulfment Other:
Moving machinery Traffic / Circulation