Ladder and scaffold law and standards in Canada

Ladders and scaffolds are covered by occupational health and safety law in every Canadian jurisdiction. The general duty clauses in each provincial and territorial OHS act require employers to provide safe equipment, information, instruction and supervision. Detailed regulations then set specific requirements for portable ladders, fixed ladders and scaffolds, and most of them call up CSA standards. This lesson maps the main rules so that you know where to look. Always check the current regulation for your province or territory, because section numbers and details change.

How the pieces fit together

The pattern is the same in both countries. The law sets duties and minimum requirements. Standards describe how equipment must be designed, tested, marked and used. Manufacturers' instructions say how a particular product may be used, and they often set limits that are stricter than the regulation. A site plan or procedure applies all three to a specific job.

Canadian standards for ladders and scaffolds

Three CSA standards matter most:

• CSA Z11, Portable ladders. The current edition is Z11-18, reaffirmed in 2022. It sets design, testing, marking and use requirements and the grades 1AA, 1A, 1, 2 and 3 that tell you how much load a ladder is rated for. Most provinces require portable ladders to meet Z11 or an equivalent standard such as ANSI A14.
• CSA Z797, Code of practice for access ladders. The current edition is Z797-18. It covers fixed access ladders, including cages, rest platforms and ladder safety systems.
• CSA S269.2, Access scaffolding for construction purposes. The current edition is S269.2-16, reaffirmed in 2021. It covers design loads, materials, erection, inspection and use of frame, tube-and-coupler and system scaffolds and mobile scaffolds.

Other CSA standards apply to suspended equipment, such as CSA Z271 for suspended elevating platforms and Z91 for window cleaning operations, and the CSA Z259 family covers fall protection equipment.

Provincial and federal regulations

The table summarizes where to find ladder and scaffold rules in several jurisdictions. These are pointers, not a substitute for reading the regulation.

Several common requirements appear across most of these regulations:

• Portable ladders must be designed, built and maintained to a recognized standard, usually CSA Z11, and marked with their grade.
• Non-self-supporting ladders must be set at the correct angle. Ontario's construction regulation requires the base to be between one quarter and one third of the ladder's length from the wall, and British Columbia specifies about 75 degrees.
• Ladders used for access must extend about 1 m above the landing. Ontario specifies at least 900 mm, and British Columbia about 1 m.
• Scaffolds must support at least four times the maximum load they will carry without overturning, and be designed by an engineer above set heights or loads.
• Free-standing scaffolds must be tied, guyed or braced when the height exceeds about three times the smallest base dimension. Ontario sets ties at vertical intervals of no more than three times the least base dimension, and British Columbia requires ties above three times the minimum base dimension.
• Scaffold platforms must be fully planked, at least the minimum width, and guarded where the fall height reaches the trigger, usually 3 m, or less where the hazard is unusual.
• A competent person must inspect scaffolds before use and regularly afterwards, and keep records where the regulation requires them.

Ontario's Working at Heights training

In Ontario, workers on construction projects who may use fall protection, including on scaffolds without full guardrails, must complete a Working at Heights course approved by the Chief Prevention Officer, valid for three years. HSE-212 covers it. That training does not by itself qualify a worker to erect scaffolds; scaffold erection requires specific competence.

Ladders and scaffolds in other industries

Outside construction, industrial and commercial workplaces follow the general industrial regulations of their province. Film and television productions, theatres, warehouses, retail stores and offices all use ladders and rolling towers, and the same principles apply even where the regulation is less detailed. Many provinces also publish guidelines, and construction safety associations such as IHSA in Ontario, the BC Construction Safety Alliance and the Alberta Construction Safety Association publish practical guides.

Duties under the OHS acts

Even where a specific rule does not exist, the general duty clause in each OHS act requires employers to take every precaution reasonable in the circumstances. A ladder that meets every regulation but is used for the wrong job can still be a breach. Supervisors must ensure workers use equipment as required, and workers must use it properly and report defects. Serious failures can lead to prosecution, and the Criminal Code's section 217.1 applies to anyone who directs work.

Duties of manufacturers, suppliers and owners

OHS law does not stop with employers. In most provinces, suppliers must provide equipment that is in good condition and complies with the regulations, and owners of buildings and projects have duties to provide information about hazards such as fragile roofs, overhead lines and weak anchorages. Scaffold rental companies supply manufacturer's data, load ratings and erection instructions, and often provide competent erectors. Constructors on construction projects coordinate the work of several employers and are responsible for making sure that scaffolds on the project are erected, inspected and maintained as required.

How inspectors enforce the rules

Provincial inspectors visit sites in response to complaints, incidents and planned campaigns. Ladders and scaffolds are frequent targets of enforcement blitzes because they are easy to see from the street and their defects are well known. Inspectors can issue orders to comply, stop-work orders for imminent danger, and in some provinces administrative penalties or tickets. Serious cases are prosecuted, and fines for corporations can reach hundreds of thousands or millions of dollars per count depending on the province. Records of inspection, training and competent person designation are often the first documents an inspector asks to see.

Reading a regulation effectively

Regulations can be hard to read, but a few habits help. Start with the definitions section, because words such as scaffold, platform, competent and ladder may have specific meanings. Check whether a section applies to all workplaces, to construction only or to a particular sector. Look for references to standards, and note the edition that the regulation calls up. Read related sections together: the scaffold rules, the guardrail rules and the fall protection rules usually interact. Finally, check for guidance documents from the regulator or industry associations that explain how the rules are applied in practice.

Standards editions and reaffirmation

Standards are revised and reaffirmed on a regular cycle. A reaffirmed standard, marked with an R and a year, has been reviewed and kept without technical change. A new edition may change requirements, for example load classes, marking rules or test methods. Regulations usually call up a specific edition or the edition in force when equipment was made. Equipment built to an older edition may remain acceptable if it is in good condition, but new purchases should meet the current edition. When a standard changes, review the fleet and the procedures that depend on it, and update training so that workers understand any new markings or limits.

Federal workplaces

Federally regulated workplaces, such as banks, telecommunications, airlines, ports, railways and federal government operations, follow the Canada Labour Code Part II and the Canada Occupational Health and Safety Regulations. COHSR Part III covers temporary structures, including scaffolds, which must support at least four times the load likely to be imposed on them, and portable ladders. Federal employers must also meet the fall protection requirements of COHSR Part XII. Where a federal workplace hires a contractor for construction, provincial rules may also apply to the contractor's work, so the arrangement should be clear in the contract.

Keep a short reference sheet for your workplace listing the regulation sections, standards and site rules that apply to ladders and scaffolds, with the date it was last checked. Review it at least once a year and whenever a regulation or standard changes, so that supervisors and workers are not relying on memory or on outdated binders.

If the regulation and a standard seem to conflict, follow the regulation and ask the regulator or a qualified advisor for an interpretation.