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
Export Authorization
ComplianceA government-issued permit allowing equipment, technology, or services to be delivered across international borders. Subcontractors must secure this before mobilising tools or personnel to foreign project sites. Missing authorisation can halt operations and trigger costly delays.
Loading Away From the Face
ComplianceA blasting technique where explosives are loaded starting from the back of the borehole toward the opening. This reduces the risk of premature detonation during charging operations. Subcontractors must follow site-specific protocols, as improper loading sequences can trigger serious safety violations.
Fixed Ladder
ComplianceA permanently mounted ladder attached to a structure, vessel, or facility used to access elevated work areas. Subcontractors must ensure fixed ladders on their worksites meet provincial and federal safety standards before crews use them. Inspect for damage, proper cage guards, and fall arrest anchor points before starting elevated work.
Moratorium
ComplianceA government or operator-imposed halt on specific activities, such as drilling or fracking, in a region. For subcontractors, this means work orders stop and contracts may be suspended without pay. Always review force majeure clauses before mobilising to areas under active moratorium discussions.
Surface Access Rights
ComplianceLegal authorisation allowing crews and equipment to enter privately or publicly owned land to perform field work. Subcontractors must confirm these rights are secured before mobilising to site. Working without confirmed access can halt operations and expose your company to liability.
FTA (Federal Transit Administration)
ComplianceA U.S. federal agency that funds and regulates public transit infrastructure projects. Subcontractors working on federally funded transit construction must meet strict FTA compliance requirements. These include labour standards, safety protocols, and Buy America provisions for materials.
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