Staying Safe
Provincial OHS law, WHMIS, the right to refuse, and what actually keeps you and your crew safe on site.
Health and safety on a Canadian site is governed province by province. Each province and territory has its own Occupational Health and Safety Act and construction regulations, enforced by its own inspectors and backed by a workers' compensation board (the WCB, or WSIB in Ontario, CNESST in Quebec). Federally regulated work runs under the Canada Labour Code instead. Across all of them the same backbone applies: the internal responsibility system, where everyone from the owner to the apprentice shares the duty to keep the site safe, plus WHMIS for hazardous products and the worker's right to refuse dangerous work. This hub explains the duties in plain English so you can run a safe site and stay on the right side of the regulator. The detail differs by province, so check your own jurisdiction's Act.
The law that governs your site
There is no single national OHS law. Each province and territory has its own Occupational Health and Safety Act with construction regulations underneath it, and federally regulated employers fall under Part II of the Canada Labour Code. They share an approach called the internal responsibility system: employers, supervisors, contractors and workers each carry a duty for safety, and the law assumes the people on site are the first line of defence, not the inspector. If you employ anyone, even one helper, the Act applies to you as an employer, with duties to provide a safe workplace, train your workers, and supply the right equipment. Serious breaches carry real fines and, after a death or serious injury, can bring charges, so this is the difference between a safe job and a courtroom.
WHMIS and the right to refuse
Two things apply on almost every site. WHMIS 2015 (the Workplace Hazardous Materials Information System, aligned with the global GHS) governs hazardous products: every controlled product needs a compliant label and a safety data sheet on site, and every worker who handles it needs training. Second, every worker in Canada has the legal right to refuse work they reasonably believe is dangerous, and the law protects them from being punished for it; the refusal triggers a set investigation process rather than an instant walk-off. Larger sites must also have a joint health and safety committee or a worker safety representative, depending on the number of workers and the province. Know these three (WHMIS, the right to refuse, and the committee threshold), because they come up on every job.
Planning the work: assessments and safe-work practices
Before high-risk work starts you assess the hazards and write down how you will control them. The paperwork goes by different names (a job hazard analysis, a safe work plan, a field level risk assessment), but the idea is the same: identify the hazard, rate it, and set the controls, then bring them to everyone on site through toolbox talks and induction. Keep the records: training, inductions, equipment inspections, and your assessments. They are the first thing an inspector asks for, and they are what protects you if something goes wrong, because they show you planned the work and managed the risk rather than winging it.
The hazards that actually hurt people
Falls from height are the leading cause of death on Canadian sites. Fall protection is required once you can fall a set height, commonly three metres, though the trigger varies by province and by the type of work, so check your regulation rather than guessing. Excavations must be sloped or shored and inspected; scaffolds erected and inspected to standard. Then there is the slow killer: respirable crystalline silica from cutting, grinding and chasing concrete, brick and stone, which causes silicosis years later. The occupational exposure limit is tight (0.10 mg per cubic metre in Ontario, with similar limits elsewhere) and the controls are water suppression, on-tool dust extraction and the right respirator, not a paper mask. Noise, manual handling, and electricity round out the list. Match the control to the hazard and write it into your safe-work plan.
Reporting injuries and dealing with inspectors
A serious injury or a fatality must be reported to your provincial OHS regulator, usually immediately, and the scene generally left undisturbed until an inspector releases it. The same event almost always means a workers' compensation claim through your provincial board (WSIB in Ontario, CNESST in Quebec, the WCB elsewhere), which covers the injured worker's medical costs and lost earnings on a no-fault basis, and because it is no-fault it generally replaces the worker's right to sue you, so being registered and paid up protects you too. Inspectors can arrive unannounced, ask for your records, walk the site and issue orders or stop-work notices on the spot. Have your paperwork in order, fix what they flag, and confirm it in writing; a tidy record and a quick fix turn an inspection into a non-event.