Disclaimer: Trenching and Excavation Safety: OSHA Guidelines from the National Association of Homebuilders (02:20)
States vary in construction standards; contact local administrators for standards applicable in your state.
Site Planning and Evaluation (01:16)
Learn the first steps of site planning.
Trenching and Excavation Hazards (03:54)
Learn the definitions of 'trenching' and 'excavation'. A list of trenching hazards includes cave-ins, hazardous atmospheres, and water accumulation. Each hazard is explained, and some are demonstrated. A warning regarding "call before you dig" is included.
Competent Person: Training to Identify Hazards (02:07)
Learn the content for hazard identification training. The competent person is someone designated by the employer to be in charge of the safety of the workers in the trench or excavation. We learn about the training, experience, and knowledge this person should have.
Inspections occur at the beginning of every workday or shift. Learn about conditions that necessitate additional inspections.
Soil Classification and Mechanics (05:34)
Soil categories range from the most stable to the least stable. Learn the characteristics of soil categories. Soil is tested visually and manually in order to determine the soil classification. We learn about previously disturbed soil classification and the causes of trench failure.
Protective Systems (07:21)
Appropriate measures for worker safety are determined by soil type and the physical issues of the site itself. We learn that protective systems around trenches 20 feet deep or less include sloping or benching, sloping or supporting, or placing a shield or box inside a trench. Each of these is demonstrated. Learn safe work practices for protective systems.
House Foundations & Basement Excavations (03:25)
We learn how to protect a foundation surrounded by a trench. Worker safety is also provided for. A warning about "call before you dig" is included.
Entry and Egress into Trenches and Excavations (00:31)
Learn how to get out of a trench safely according to OSHA guidelines.
Hazardous Atmospheres (01:56)
Hazardous atmospheres in trenches can be caused by exhaust from gas-powered equipment or by hazardous fumes from waterproof sealants. It is essential to test for toxic gases. Learn OSHA guidelines for worker safety when the potential for hazardous atmospheres is present.
Credits: Trenching and Excavation Safety: OSHA Guidelines from the National Association of Homebuilders (00:26)
Credits: Trenching and Excavation Safety: OSHA Guidelines from the National Association of Homebuilders
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