Trench Box

A joint API/ASME standard used to assess whether ageing or damaged equipment is still safe to operate. Subcontractors may be required to conduct or support FFS assessments on pressure vessels, piping, and tanks. Results determine if equipment can stay in service, requires repair, or must be decommissioned.

Formal renewal of a previously approved work permit, purchase order, or scope of work that has expired or exceeded its original limits. Subcontractors must secure reauthorization before continuing work to avoid unpaid labour exposure. Delays in reauthorization can stall field crews and disrupt project schedules.

A U.S.-based non-profit that develops safety research, training materials, and hazard guides used widely across North American job sites. Subcontractors often reference CPWR toolbox talks and fall protection resources to meet compliance requirements. Their free publications can support your crew orientations and site safety plans.

Any task that produces open flame, sparks, or heat sufficient to ignite flammable materials. Common examples include welding, cutting, and grinding. Subcontractors typically require a Hot Works permit before starting, and site compliance checks are strict.

An accidental strike on a buried utility, pipeline, or cable during excavation work. For subcontractors, a dig-in can trigger work stoppages, liability claims, and regulatory investigations. Always confirm locate tickets are current before any ground disturbance.

A documented response to a safety incident, audit finding, or client complaint that outlines steps taken to fix the root cause. Subcontractors are often required to submit corrective action reports to maintain contract standing. Failure to close them out on time can result in suspension from a client's approved vendor list.

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