A sudden cave-in of trench walls during excavation, posing serious injury or fatality risk to workers below grade. Subcontractors must ensure shoring, sloping, or trench box systems meet provincial OH&S requirements before crew entry. Liability for collapse incidents often falls on the excavating subcontractor, making documented safety compliance critical.
Trenching Collapse
Related Terms
Fall Prevention Campaign
ComplianceA structured site safety initiative targeting fall hazards across elevated work areas, scaffolding, and ladders. Subcontractors are typically required to participate and document compliance as a condition of their contract. It often involves toolbox talks, harness inspections, and audits by the prime contractor.
FMCSA (Federal Motor Carrier Safety Administration)
ComplianceThe U.S. federal agency regulating commercial trucking and transportation safety. Subcontractors hauling equipment across the border or operating in the U.S. must comply with FMCSA rules. This includes driver logs, vehicle inspections, and carrier registration requirements.
LSL (Lead Service Line)
ComplianceA water pipe made from lead that connects a municipal main to a building. Subcontractors must identify and report LSLs during excavation, pipe work, or utility upgrades. Strict handling and disposal regulations apply under federal and provincial environmental codes.
Coal Workers' Pneumoconiosis
ComplianceA chronic lung disease caused by prolonged inhalation of coal dust, commonly called black lung. Subcontractors working near coal handling, mining, or processing sites must ensure crews have proper respiratory PPE. Exposure history affects worker fitness-for-duty certifications and employer liability.
DOL (Department of Labour)
ComplianceThe U.S. federal agency that enforces wage, hour, and worker classification laws affecting subcontractors. It oversees rules on overtime pay, prevailing wages, and employee vs. contractor status. Non-compliance can trigger audits, back-pay orders, and significant penalties.
Recordable Injury
ComplianceA work-related injury or illness that requires more than basic first aid, such as medical treatment, restricted duty, or lost time. Subcontractors must log these incidents and report them to the prime contractor. High recordable rates can disqualify your company from future bids or vendor pre-qualification lists.
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