ASME (American Society of Mechanical Engineers)

A licensed physician who reviews and verifies workplace drug test results before they are reported to an employer. Subcontractors must use an MRO-approved process to meet site access and compliance requirements. Failed or unverified MRO results can pull workers from the field immediately.

A designated area on a job site where active work is performed, governed by strict safety and access controls. Subcontractors must obtain proper authorisation before entering and adhere to posted hazard signage. Boundaries are typically marked with barriers, flagging, or signage established by the prime contractor.

A mandatory work stoppage where all excavation and trenching crews halt operations to review cave-in prevention and protective system requirements. Subcontractors must ensure workers, supervisors, and equipment operators participate before resuming ground-breaking work. Primes may require documented sign-off proving your crew completed the stand down.

A technique where certified technicians use ropes and harnesses to reach elevated or confined work areas without scaffolding. Common in tank inspections, flare stack maintenance, and structural repairs. Subcontractors must ensure crews hold valid IRATA or SPRAT certifications before mobilising.

A legal principle that assigns fault percentages to each party involved in an incident or loss. If a subcontractor is found partially at fault, their compensation can be reduced by their share of blame. Understanding this protects subcontractors from absorbing disproportionate liability on shared job sites.

A 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.

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What to do after a jobsite injury or incident, what your rights are before signing incident reports, how workers' compensation works, and how to protect yourself on multi-employer worksites.

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Learn which MSA clauses actually matter for oilfield subcontractors: indemnity, insurance, payment terms, and change orders. Know what you're signing.