A shored or sloped excavation method used to protect workers from cave-ins during underground pipeline or utility work. Subcontractors are typically required to design and document the system before crews enter any trench deeper than 1.2 metres. Compliance with provincial safety codes is mandatory and directly affects site access approvals.
Protective Trench System
Related Terms
PHMSA (Pipeline and Hazardous Materials Safety Administration)
ComplianceA U.S. federal agency that sets safety regulations for pipeline operations and hazardous materials transport. Subcontractors working on pipeline projects or hauling dangerous goods must meet PHMSA compliance standards. Non-compliance can result in fines, work stoppages, or contract termination.
Work Zone
ComplianceA 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.
NAICS (North American Industry Classification System)
ComplianceA standardised code system used to classify businesses by industry type across Canada, the US, and Mexico. Subcontractors use NAICS codes when registering with clients, bidding on contracts, or filing taxes. Your code signals what work you perform and affects vendor qualification and insurance requirements.
Surface Transportation Reauthorization
ComplianceA periodic federal renewal of legislation governing road, rail, and trucking regulations. For subcontractors, it can change load limits, hauling permits, and carrier compliance requirements. Review updates carefully, as new rules may affect equipment mobilisation costs and timelines.
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.
Ansi/isea 138
ComplianceThe American National Standard for hand protection selection criteria. It gives subcontractors a structured method to match the right gloves to specific job hazards. Clients and prime contractors increasingly require documented compliance with this standard on worksites.
Latest Compliance News
IRS Waives Penalties for Red-Dyed Diesel on Highways Through Dec. 31
The IRS will not penalize highway use of dyed diesel from Oct. 1 to Dec. 31, 2026. Contractors running off-road fuel in trucks should still check state rules and document fuel purchases.
20 hours agoComplianceSpecialty Trades Cut Injury Rates 32.4% Since 2011-12, CPWR Finds
CPWR's June 2026 data bulletin shows nonfatal injury rates fell 46.9% in heavy and civil, 32.4% in specialty trades and 32.2% in building construction. Safety leads should benchmark against the specialty-trades figure before their next renewal.
20 hours agoComplianceOSHA Targets November Proposal to Revisit Computer-Based LOTO Controls
OSHA lists a lockout/tagout update (RIN 1218-AD00) with a November 2026 target for a proposed rule on computer-based controls. The current 29 CFR 1910.147 requirements still apply.
yesterdayComplianceOSHA Proposes $648K Against Six Contractors at Monroe, NY Excavation
OSHA cited a general contractor and five subcontractors at the Monroe Commons site for willful and serious excavation violations. The proposed penalties total $648,094.
6 days agoRelated Guides
When a Jobsite Incident Happens: What Field Workers Need to Know Before Signing Anything
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.
Compliance GuideOSHA Citations on Multi-Employer Worksites: What Subcontractors Need to Know
Learn how OSHA's multi-employer citation policy works, why subcontractors get cited for hazards they didn't create, and how to protect your company on operator-controlled job sites.
Compliance GuideHow to Read and Negotiate an Oilfield Master Service Agreement (MSA): A Subcontractor's Guide
Learn which MSA clauses actually matter for oilfield subcontractors: indemnity, insurance, payment terms, and change orders. Know what you're signing.
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