Construction Site Signs Ontario — OHSA Required Signage

Every construction site in Ontario must display specific safety signage as mandated by the Occupational Health and Safety Act (OHSA) and Ontario Regulation 213/91 (Construction Projects). Missing or inadequate signage can result in MOL stop-work orders, fines up to $100,000 for individuals and $1.5 million for corporations. Niagara Stands Out prints OHSA-compliant construction site signs that keep your job site legal and your workers safe.

OHSA Required Construction Site Signs

• Project Information Sign: Must display contractor name, address, project description, and the OHSA poster location.
• PPE Required Signs: Hard hat, safety glasses, steel-toe boots, high-vis vest — posted at every access point.
• Danger/Warning Signs: Electrical hazard, excavation, overhead loads, confined space — CSA Z321-compliant.
• First Aid Station Sign: Location of first aid kit, emergency numbers, nearest hospital.
• OHSA Poster (Form 82): The "Health and Safety at Work" poster — required at every construction project.
• Fire Extinguisher & Emergency Exit Signs: Location markers and exit routes.
• No Trespassing / Authorized Personnel Only: Perimeter signage for public safety.

CSA Standards for Safety Signs

Ontario construction safety signs must comply with CSA Z321 — Signs for the Workplace:

• Danger: Red/white/black — immediate hazard that could cause death or serious injury.
• Warning: Orange/black — hazard that could cause death or serious injury.
• Caution: Yellow/black — hazard that could cause minor or moderate injury.
• Notice: Blue/white — general information, no direct hazard.

Materials Built for Job Sites

• Aluminum: Permanent signs that resist corrosion, UV, and impact.
• Coroplast: Affordable temporary signage for project-duration use.
• Rigid PVC: Lightweight, durable indoor/outdoor option.
• Vinyl Decals: Apply to equipment, barriers, and vehicles.

Serving Ontario Construction

From residential renovations in Niagara Falls to commercial projects in Hamilton to infrastructure in the GTA — we ship OHSA-compliant signs across Ontario. Same-day rush for MOL inspection deadlines.

Shop OHSA Construction Signs →

Frequently Asked Questions

What signs does OHSA require on a construction site?

At minimum: project information sign, PPE requirement signs at access points, hazard-specific warning signs, OHSA poster (Form 82), first aid station location, and emergency contact information.

What happens if I am missing required signs during an MOL inspection?

A Ministry of Labour inspector can issue orders, fines, or stop-work orders. Individual fines can reach $100,000 and corporate fines $1.5 million for serious violations under OHSA.

Can I get same-day signs for an urgent inspection?

Yes. We offer same-day production and local delivery in the Niagara Region. Next-day delivery to Hamilton and the GTA.