Supervisor duties under provincial OHS law

On a construction site, the person who most shapes whether workers go home unhurt is not the safety coordinator, the owner or the inspector. It is the supervisor who assigns the work, decides how it will be done and is standing nearby when it happens. This course is about that role. CON-305 introduced the superintendent's job and gave a first overview of supervisors' legal duties, due diligence and personal liability. This course goes further: it treats safety as a core part of supervising construction work and follows the Larkspur Commons team through a year of planning, hazard assessment, inspections, incidents, high-risk work and culture building.

Larkspur Commons is the six-storey building of 112 rental homes over shops in Kelowna, British Columbia, that has run through the whole track: a two-storey concrete podium and four storeys of wood frame, built by Thornbury Builders for about $48 million over 20 months. Dana Whitfield is the superintendent, Omar Haddad the assistant superintendent and Mei Lin the field engineer. For this course Thornbury has added a site safety coordinator, Priya Sandhu, who works across two Thornbury sites. Priya advises, audits and trains; she does not supervise the crews. That distinction is the first lesson of the course: safety is a line responsibility, and the safety coordinator supports the line rather than replacing it.

Who is a supervisor?

Canadian occupational health and safety laws define a supervisor broadly. In British Columbia, the Workers Compensation Act defines a supervisor as a person who instructs, directs and controls workers in the performance of their duties. Ontario's Occupational Health and Safety Act uses a similar test: a person who has charge of a workplace or authority over a worker. The title does not matter. A lead hand who tells three labourers where to set up and what to do next is a supervisor for those workers, whether or not the company calls him one. On Larkspur Commons that means Dana and Omar, every Thornbury foreman and lead hand, and every subcontractor foreman, are supervisors of the workers they direct.

A worker who directs others for a single task is a supervisor for that task. When Omar sends an apprentice carpenter with a journeyman to install guardrails on level 4, the journeyman directs the apprentice's work and is responsible for doing it safely. Thornbury's site rules make this explicit: anyone who directs the work of another worker is expected to know the hazards of that work and to make sure the controls are in place before it starts.

What the law requires of supervisors

British Columbia's Workers Compensation Act sets out general duties for employers, workers, supervisors, owners, prime contractors and suppliers, and the Occupational Health and Safety Regulation fills in the detail. A supervisor must ensure the health and safety of the workers under their direct supervision, know the requirements of the Act and Regulation that apply to that work, ensure the workers know about the hazards and comply with the rules, and consult and co-operate with the joint committee or worker representative. Ontario's OHSA states the duties in a familiar list: ensure workers use the protective devices and procedures the employer requires, advise workers of existing or potential hazards that the supervisor knows about, provide written instructions where prescribed, and take every precaution reasonable in the circumstances for the protection of a worker. The wording differs among provinces, but the core is the same everywhere in Canada.

Prime contractors, controlling employers and multi-employer sites

A construction site has many employers. British Columbia handles that with the prime contractor. On a multiple-employer workplace the owner must designate a prime contractor in writing; if it does not, the owner is the prime contractor. The prime contractor must ensure that the activities of all the employers, workers and others are coordinated, and must establish and maintain a system or process to ensure compliance with the Act and Regulation. Under the CCDC 2 contract for Larkspur Commons, the owner has designated Thornbury as prime contractor, so Dana's team is responsible for coordinating the safety of every trade on site, not only Thornbury's own workers. That does not relieve each subcontractor of its own duties as an employer. Ridgeline Framing still has to train, supervise and equip its own crews; Thornbury has to make sure the pieces fit together.

The practical result is the same in both countries. The general contractor's superintendent cannot say that a subcontractor's unsafe practice is the subcontractor's problem. Dana is expected to notice it, to require it to be corrected, and to follow up if it is not. Lesson 4 covers how Thornbury prequalifies subcontractors and holds them to the site rules.

The competent person and the qualified person

Many sections of the BC Regulation require that particular work be done or checked by a qualified person, defined as someone who has the knowledge, training and experience to perform the duty. Fall protection plans, excavation inspections, scaffold inspections and rigging checks are examples. Other provinces use the term competent person for a similar idea. The supervisor does not have to be the qualified person for every task, but must know when one is needed and make sure one is assigned and has done the work.

Each week Omar checks the look-ahead schedule (CON-335) against a simple list: which activities next week need a qualified or competent person, and who it will be. If an activity has no name against it, the activity is not ready.

# Next week's high-risk activities and their designated checker (illustrative)
activities = [
    ("storm line trench, gridline A", "excavation", "Omar Haddad"),
    ("east elevation scaffold raise", "scaffold", "R. Gill (scaffold contractor)"),
    ("level 5 leading-edge framing", "fall protection", "B. Kowalski"),
    ("wall panel picks, levels 5-6", "rigging", "T. Moreau (rigger)"),
    ("roof membrane torch-on, podium", "hot work", None),
    ("temporary power to level 6", "electrical", "Ashgrove Electric lead hand"),
]
ready = [a for a in activities if a[2]]
missing = [a for a in activities if not a[2]]
print(f"{len(ready)} of {len(activities)} activities have a designated checker")
for name, kind, _ in missing:
    print(f"NOT READY: {name} ({kind}) has no qualified or competent person assigned")

5 of 6 activities have a designated checker
NOT READY: roof membrane torch-on, podium (hot work) has no qualified or competent person assigned

The torch-on roofing at the podium had no name because the roofing subcontractor had changed its foreman. Omar phoned the subcontractor that afternoon, and the new foreman's hot work training record was in the site file before the work started.

Workers' rights that supervisors must respect

Workers in every Canadian jurisdiction have three basic rights: to know about hazards, to participate in health and safety through committees and representatives, and to refuse work they have reasonable cause to believe is unsafe. In British Columbia, a worker who refuses unsafe work must report it to the supervisor, who must investigate and either fix the problem or explain why it is safe; if the worker still refuses, the supervisor investigates with a worker representative, and if the matter is still not resolved, a WorkSafeBC officer is called. A worker must not be disciplined for refusing in good faith. A supervisor who responds to a refusal with anger or a threat, or who quietly gives the refuser fewer hours, is breaking the law and teaching the whole crew to stay silent.

Dana's approach to a refusal is simple: thank the worker, stop the task, look at the hazard together, and fix it or explain it. Most refusals on a construction site are not legal disputes. They are a worker telling the supervisor something the supervisor needs to know.

Regulators and where Larkspur Commons sits

Occupational health and safety in Canada is mainly provincial. WorkSafeBC administers both the compensation system and the safety regulation in British Columbia, and its prevention officers inspect construction sites, issue orders and impose administrative penalties. Federally regulated work, such as some interprovincial pipelines and telecommunications, falls under the Canada Labour Code instead, but a residential building in Kelowna is provincial. Thornbury also builds in Alberta, where the OHS Act and Code apply and the compensation board is separate from the safety regulator. Supervisors who move between provinces need to check the local rules; the principles carry over but the details do not.

This course gives the rules for the Larkspur Commons jurisdiction in detail and mentions others for comparison. HSE-375, Constructor and Supervisor Responsibilities on Construction Projects, in the Safety Training stream, covers the legal framework in more depth for those who need it.

Safety as part of supervising, not an add-on

A supervisor who treats safety as a separate job, something the safety coordinator does on Thursdays, will find that the work is planned without it and the hazards are discovered when someone is hurt. Dana's view, which this course follows, is that a job is not well planned unless it is planned to be done safely, and a crew is not well led unless it is led to work safely. The same habits that produce good schedules and good quality, covered in CON-335 and CON-345, produce safe work: thinking ahead, checking before work starts, setting clear expectations, following up and learning from what goes wrong.

Lesson 2 turns to due diligence: how a supervisor shows, with records and actions, that they took every reasonable precaution. Lessons 3 to 8 cover the systems a supervisor runs every day: site safety plans, orientations, hazard assessments, toolbox talks, inspections and incident investigations. Lessons 9 and 10 cover the high-risk work that causes most serious injuries in construction, and lesson 11 covers safety culture. Lesson 12 puts it all together in a safety leadership plan for a new project.