Harness and Aerial Platform: The Rule in Quebec

The answer first depends on the movement of the platform, not just its height. On a construction site in Quebec, a harness connected to the platform's anchor is mandatory in a group B multidirectional elevating platform. For a group A platform that only elevates vertically, like many scissor lifts, this requirement is not automatic under this rule alone. However, the manufacturer, employer, or the site's prevention program may require it.

This distinction explains why two workers might give different answers while discussing similar machines. The correct approach is to identify the device's group, read the manufacturer's instructions, check the prevention program, and use only the designated anchor point.

The Short Answer

Group B Multidirectional Platform

Yes, the harness is mandatory. Group B includes devices whose platform can move horizontally relative to the chassis, such as an articulated or telescopic boom lift. The worker must wear a safety harness connected by a fall arrest lanyard to the anchorage system provided by the device's manufacturer.

Group A Vertical Elevating Platform

Not automatically due to the type of device alone. Group A includes platforms that move up and down on a vertical axis, notably many scissor lifts. Their guardrails typically provide collective fall protection. However, a harness must be worn when required by the manufacturer, a risk assessment, the employer, the main contractor, or the prevention program.

A site rule can therefore be stricter than the regulatory minimum. If the site requires a harness on all platforms, this instruction must be followed even on a group A platform.

Group A or Group B: How to Recognize the Difference

The CNESST classifies mobile elevating work platforms, or MEWPs, into two main groups.

Group A includes vertical elevating platforms. The platform remains within the chassis's tipping limits and primarily moves up or down. A scissor lift is the most common example.

Group B includes multidirectional platforms. Their arm allows the platform to move horizontally away from the chassis. Articulated and telescopic boom lifts generally fall into this category.

The word "boom" is not always sufficient to classify the equipment. It is necessary to check the nameplate, the manufacturer's manual, and the training certificate. The CSA B354.6 standard also distinguishes types based on how the device is moved, but it is the group A or B classification that clarifies the specific harness rule.

What the Safety Code Exactly Says

Paragraph 6 of section 2.15.12 of the Safety Code for the Construction Industry targets multidirectional elevating devices. When the platform can move horizontally away from the chassis, the worker must wear a harness connected by a fall arrest lanyard to the anchorage provided by the manufacturer. If the manufacturer has not provided an anchorage, the anchorage used must meet regulatory requirements.

This specific requirement is related to the device's behaviour. A sudden movement, a jolt, a wheel falling into a cavity, or a catapult effect can throw a person off the platform of a multidirectional device. The guardrail remains essential, but it does not replace the fall arrest lanyard required in group B.

The rule does not say to wait until you are three metres high. In a group B platform, the requirement stems from the type of device. The general fall threshold of more than three metres provided in section 2.9.1 should not be used to conclude that the harness would be optional at low height in a multidirectional boom lift.

Where and How to Attach the Lanyard

The harness must be connected to the anchor point designated by the manufacturer inside the platform. This point is normally identified on the device or in the manual. The guardrail, a handle, the control support, and a structure next to the platform do not become anchors simply because a carabiner can close on them.

Section 2.10.12 of the Code requires a harness compliant with the CSA Z259.10 standard. The lanyard must limit the maximum fall arrest force to 6 kN or the free fall height to 1.8 m. When a lanyard and energy absorber are used, their total maximum length is 2 m.

These limits do not allow for choosing a lanyard at random. The lanyard must be compatible with the device, the anchorage, the available space, and the manufacturer's instructions. A lanyard that is too long can increase the worker's movement or create a different risk. The choice must be part of the work method.

Never Attach Outside the Platform

In the normal use of the MEWP, the lanyard must be attached to the platform's anchorage. Attaching to a beam, a building, or another structure can expose the worker to being pulled if the device moves. A specific high-access procedure designed and approved by an engineer may provide for other steps, but it should not be improvised by the operator.

The Specific Case of the Scissor Lift

A typical scissor lift belongs to Group A because its platform elevates vertically. Therefore, paragraph 2.15.12(6) does not automatically require a harness just because the worker is in this platform.

The guardrail must remain complete, closed, and in good condition. It is prohibited to climb on the guardrail, place a ladder or plank in the platform, or use an object to gain height. Wearing a harness does not make these practices permissible.

However, the harness becomes mandatory if the manufacturer's instructions prescribe it, if the master builder's or employer's prevention program requires it, or if an approved work method provides for it. The ASP Construction reminds that a prevention program can impose stricter measures than the minimum Code requirements.

Before concluding that a harness is unnecessary in a scissor lift, four elements must be checked: the group of the device, the manual, the risk analysis, and the site-specific rules.

Mandatory training is not limited to a card

Article 2.15.17 of the Code stipulates that an MEWP can only be used on a site by an operator who is adequately trained and familiar with the type and group of equipment.

Initial training must include a theoretical part, a practical part, and an evaluation for each type and group targeted. The practical part must include at least one hour at the controls per worker. An update is required every five years and must include at least a practical exam.

Familiarization then takes place on the site with the actual machine used. It covers, among other things, the location of the manual, the manufacturer's warnings, the controls, the safety devices, and the specific operating characteristics.

Therefore, a training certificate does not automatically authorize a person to use any platform. The employer must ensure that the operator has the training corresponding to the device and has been familiarized with this model. A short documented safety meeting can also serve to confirm site instructions, without replacing the required training.

Inspections to perform before climbing

The CNESST requires a maintenance and inspection program in accordance with the manufacturer's recommendations and the CSA B354.7 standard. It includes a daily inspection, periodic inspections required by the manufacturer, an annual inspection, and certain structural inspections.

The structural inspection is notably required ten years after the construction of the platform, then every five years, after damage likely to affect its integrity, and during a change of ownership. The owner must keep a record of inspections and repairs.

Before each shift, the operator must at least check the general condition, controls, emergency stop, guardrails and door, tires or stabilizers, leaks, alarms, rated capacity, and anchor points. Defects must be reported and followed up; our guide on tracking equipment anomalies explains how to keep a clear record until correction.

The harness, lanyard, and connectors must also be inspected before each use. ASP Construction recommends an inspection at least annually by a competent person, in addition to the manufacturer's requirements. A set that has been used to arrest a fall must be removed from service, even if no damage is visible.

Exiting the platform at height: a very controlled exception

An MEWP is primarily a variable height workstation, not an elevator allowing disembarkation onto a structure. Entering or exiting the platform when it is elevated is normally prohibited.

The CNESST provides an exception only when the analysis shows that standard access means are impossible. A risk analysis and a procedure approved by an engineer familiar with the operation of MEWPs are then required. The procedure must specify the device, anchors, protective equipment, transfer sequence, presence of a second person, safety perimeter, and emergency measures.

Wearing a harness is therefore not sufficient to move from the platform to a roof, beam, or floor. Without a compliant procedure, the worker must remain in the platform.

Who is responsible for what?

The employer and the master builder

They must identify risks, choose a suitable device, maintain the equipment in good condition, provide the required protective means, ensure training and familiarization, establish work methods, and enforce the prevention program. They can impose stricter protection than the regulatory minimum when a risk or the site context justifies it.

The platform owner

They must ensure maintenance, inspections, and record-keeping. When the device is rented, the company using it must obtain the necessary information and verify that the required inspections are up to date.

The operator and occupants

They must follow the training and familiarization, perform the planned checks, respect load limits and manufacturer instructions, use the harness and lanyard when required, keep the door closed, and immediately report any defect or hazardous condition.

Five concrete situations

An articulated boom lift rises to two metres

The arm can move the platform horizontally: this is a group B. The harness connected to the platform's anchor is mandatory, even if the momentary height is less than three metres.

A scissor lift is used in a warehouse

If it only elevates vertically, it normally belongs to group A. The harness is not automatically required by the rule specific to multidirectional devices. However, it is necessary to check the manual, the prevention program, and the requirements of the establishment or site.

The site requires a harness in all MEWPs

The instruction must be followed. A prevention program can go beyond the minimum provided by the Code when the employer or the main contractor deems the measure necessary.

The anchor point is absent or damaged

In a group B device, the anchor should not be replaced by the guardrail. The device must be removed from the concerned use until a compliant solution is confirmed according to the manufacturer and regulations.

The worker wants to climb on the guardrail

This is prohibited. The harness does not turn the guardrail into a step and does not allow adding a ladder or object in the platform to reach higher.

Myths to Dispel

"The harness is only mandatory above three metres"

False for a group B multidirectional platform. The specific obligation depends on the movement of the device, not the three-metre threshold.

"All platforms always require a harness"

Inaccurate as a general rule of the Code. Group B requires it. In group A, it is necessary to check the manufacturer's instructions, the risk analysis, and the site rules, which may make the harness mandatory.

"I can attach myself to the guardrail"

False. The connection must be fixed to the anchor point provided by the manufacturer or to a compliant anchor in the prescribed regulatory situation.

"My training allows me to use all models"

False. The training targets a type and group of equipment, then familiarization is required on the site for the specific characteristics of the machine used.

The 60-Second Check Before Work

Before going up, ask these questions in order: what is the group and type of the MEWP? Are the manual and inspections available and up to date? Does the operator have the appropriate training and familiarization on this model? Does the prevention program require the harness? If so, are the harness, connection, and anchor compliant, compatible, and in good condition?

If an answer is missing, it is better to stop and clarify before elevating the platform. On a group B device, the absence of a harness, connection, or usable anchor is not an administrative detail: it is a condition that prevents compliant use.

Key Takeaways

Group B multidirectional: harness mandatory and connection fixed to the platform's anchor. Group A vertical: harness not automatic under this provision alone, but it becomes mandatory if the manufacturer, risk analysis, or prevention program requires it.

In all cases, the guardrail must remain intact, climbing to gain height is prohibited, the operator must be trained and familiarized, and the device must be inspected and maintained. In case of doubt about the classification or work method, consult the manual, the OHS manager, or the CNESST before using the equipment.