Ladder Safety Requirements

Ladder Safety in Ontario: What the Regulation Actually Requires

The requirements below come from Ontario Regulation 213/91 (Construction Projects) sections 78 through 82, plus the fall-protection trigger in section 26.1 and the defective-ladder rule in section 93, under the Occupational Health and Safety Act (OHSA), together with CSA Z11-12 (Portable Ladders). These are the rules that govern every ladder on an Ontario construction site, and the rules a Ministry of Labour inspector will check when they see a worker on a ladder.

Reviewed against O. Reg. 213/91 (current e-Laws consolidation, as amended to O. Reg. 345/15) and the IHSA Ladder Use in Construction guideline. Verify at ontario.ca/laws before relying on it for compliance.

Why do ladder falls keep happening?

Ladders are the most common means of access on construction sites, and per the Ministry of Labour's own Construction Program data, ladder-related events accounted for about 13% of critical injuries and 4% of fatalities its inspectors investigated between 2011 and 2017. The failures are predictable: a worker sets up at the wrong angle and the base slides out; a worker reaches too far to the side and the ladder tips; a worker carries materials in both hands and loses their grip. Each maps directly to a rule in O. Reg. 213/91 or CSA Z11-12 - the 1:4 pitch, the belt-buckle-inside-the-rails limit, and the three-limb contact expectation.

How do you set an extension ladder at the right angle? (s. 81(2) and s. 82)

According to O. Reg. 213/91 s. 81(2), a non-self-supporting ladder must be placed so its base sits between one-quarter and one-third of the ladder's length out from the wall. The field version is the 1:4 rule: for every 4 feet of working height, set the base 1 foot out. A ladder reaching 16 feet up should have its base 4 feet out - about 75.5 degrees at the steep (one-quarter) limit. Too steep and it can tip backward when you lean; too shallow and the base slides out. Section 82 adds that a ladder used for access between levels must extend at least 900 mm (3 feet) above the landing, keep 150 mm clear behind each rung, and be secured at the top and bottom to prevent movement. That top extension is your handhold at the transition point - the exact spot where a large share of ladder falls happen.

Does three-point contact mean you can't carry tools? (CSA Z11-12)

Yes. Three-point (three-limb) contact - two hands and one foot, or two feet and one hand - is the cornerstone rule for climbing: if one limb slips, three remain. It is a CSA Z11-12 and Ministry of Labour guideline expectation rather than a numbered O. Reg. clause, and the MOL guideline is explicit that a worker "must maintain three-limbed contact so that both hands are used when climbing up or down." That is incompatible with carrying tools or materials by hand. Use a tool belt, a hoist line, or a rope and bucket, and keep your belt buckle between the side rails. The few seconds saved carrying a drill up in one hand is not worth the fall - or the inspector's order.

Does a ladder have to be tied off? (s. 82)

A ladder used for access between levels must be secured at the top and bottom to prevent movement (O. Reg. 213/91 s. 82). The most reliable method is tying the top to a structural member - a truss, a stud, a permanent anchor. Where the top cannot be tied and the ladder is a portable one that cannot otherwise be secured, a worker must hold the base while it is in use. An unsecured ladder relies entirely on friction at its feet, and friction fails without warning on wet grass, sawdust, gravel, or ice. Section 81(1) separately requires firm, level footing and bans defective or loose rungs, and section 115 prohibits using a barrel, box, cart, or other loose object as a support.

Can you use a metal ladder near power lines? (electrical-hazard provisions)

No. Near energized conductors, only a non-conductive ladder may be used - in practice, fibreglass. An aluminium ladder that contacts a live overhead line conducts the current through the ladder, through the worker, and to ground faster than anyone can react; even indirect contact while holding the base from the ground can be fatal. Wet wood conducts too, and job-made wooden ladders on site are often wet. Fibreglass ladders rated for electrical work carry a clear dielectric label. This follows the electrical-hazard provisions of O. Reg. 213/91 and CSA Z11-12; on any site with overhead lines, transformers, panels, or live conductors, fibreglass is the only acceptable material.

What ladder grade do you need on a construction site? (s. 80(1))

This is where a lot of sites get it wrong. Under O. Reg. 213/91 s. 80(1), a portable ladder on a project must meet the CSA Z11-12 requirements for a Grade 1, Grade 1A, or Grade 1AA ladder. The lighter grades sold at hardware stores are not permitted on a construction project:

The load rating covers the worker plus tools, tool belt, and materials. A 200-pound worker in a loaded tool belt is already past Grade 3 and into Grade 2 territory; add a bundle of shingles or a sheet of plywood and only a Grade 1 or 1A is honest. Grade 1 is the practical minimum on a construction project, and Grade 1A is the common choice when you carry loads. The grade label is the manufacturer's engineering limit - exceeding it risks a rung, rail, or joint failing.

What does a pre-use inspection cover, and when must a ladder come off the site?

Every ladder must be inspected before use. Check side rails for bends, cracks, dents, or corrosion; rungs for damage, looseness, or absence; feet and shoes for wear; spreaders and locks (step ladders); rung locks, rope, and pulley (extension ladders); the CSA grade label; and all hardware for tightness. Per O. Reg. 213/91 s. 93(2), a ladder with weakened, broken, bent, or missing steps, broken or bent side rails, or missing non-slip feet must not be used. Tag it "DO NOT USE" and remove it from the site to be repaired or destroyed - a defective ladder left accessible will be used by someone who did not see the defect, and its mere presence is a citable hazard. Section 25(2)(h) of OHSA - the general duty to take every precaution reasonable in the circumstances - backs this up.

When is a ladder the wrong tool?

Ladders are for access and short, light work. The regulatory line is not a fixed height but a hazard test: O. Reg. 213/91 s. 125(1) requires a scaffold or other work platform where work cannot be done from the ground or a permanent structure without hazard, and s. 26.1 requires fall protection for any fall of more than 3 m. So once you are working from a ladder above 3 m - both hands on the task, leaning out, or up high for a sustained stretch - you need a full-body harness with fall arrest anchored independently of the ladder, or you should switch to a scaffold or elevating work platform. As a rule of thumb, sustained two-handed work above roughly 6 m (20 ft) on a portable ladder is a strong signal to use a platform instead. The day-rate on a scissor lift is a fraction of the cost of one fall - in medical bills, WSIB premiums, lost time, and penalties.

Building on this: our Fall Protection Checker works out the harness, lanyard, and anchor for work above 3 m, and the Scaffold Inspection Checklist covers the platform alternative. See every OHSA tool on the WSIB & OHSA hub. If you run crews in Ontario, ToolFluency's Ontario contractor tools keep your compliance, timesheets, and invoicing in one place.