Aerial Devices and Elevated Work Platforms

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An "aerial device" means a vehicle-mounted telescoping or articulating unit that is used to position a worker at an elevated worksite. The devices include a work basket or bucket, an aerial ladder, an extendable and articulating boom platform, a vertical tower and any combination of those devices.

An “elevated work platform” means a work platform that can be self-elevated to overhead worksites, and includes an elevating rolling work platform, a self-propelling elevating work platform and a boom-type elevating work platform.

Incorrect use or the use of defective devices may increase the risk of falls from heights, electrocution, tip-overs, and being crushed or struck by falling loads. Most of the time, the consequences of such accidents are tragic

The Occupational Health and Safety Regulations establish specific duties for the employers, contractors, owners, suppliers, and operators of aerial devices and elevating work platforms.

Employers and contractors must ensure that the aerial devices used in the workplace are designed, constructed and used in accordance with an approved standard. Where the employer cannot assess if the device meets the requirements of the approved standard, a professional engineer must certify that the device is safe for lifting personnel and loads and all its components have been designed in accordance with an approved standard.

Employers and contractors must make sure that the following safety requirements are applied:

  • A worker who is required to operate an aerial device or elevating work platform is trained and knowledgeable of the:
    • Manufacturer’s instructions and recommendations
    • Load limitations,
    • Proper use of all controls, and
    • Limitations of the surfaces on which the device or work platform are designed to be used.
  • No worker is raised or lowered by an aerial device or elevated work platform or works from a device or platform held in an elevated position unless:
    • the device is designed, constructed and erected for the purpose of lifting and supporting workers
    • there is an adequate means of communication between the worker on the platform and the one operating the controls
    • the elevating device has safety features that will prevent an unexpected movement of the platform
    • there are no obstructions, environmental situations, or road traffic conditions which may place the worker in danger
    • the brakes of the aerial device or elevating work platform are engaged (except when operated according to the manufacturer’s instructions
    • the outriggers of the aerial device or elevating work platform are set, and
    • the worker uses a personal fall arrest system that is connected to the elevating work platform from a lanyard attachment point that is designed and constructed to an approved standard or is certified as safe by a professional engineer.
  • When a worker is working from an aerial device or elevated work platform, and may be exposed to an energized high voltage conductor, he or she must operate the controls of the device or platform,
  • A worker leaving an aerial device or elevated platform parked or unattended must fully lower and retract the device with the hydraulic systems into the neutral position, lock it, or render it inoperative,
  • The operator of the forklift that has the forks in the raised position must remain at the controls and must not drive the forklift while a worker is on a work platform mounted on the forklift, and
  • The manufacturer’s operating manuals for elevating work platform and aerial devices are always kept with the device or platform.

Employers, contractors, owners or suppliers are responsible for:

  • Appointing a competent person to inspect and maintain the aerial device and elevating work platform, and
  • Making sure that the devices have attached a maintenance and inspection record tag near the operator’s station.

Operator’s duties include to:

  • Follow the manufacturer’s operating recommendations,
  • Know the limitations of the equipment, and
  • Comply with the safe operating procedures as required by the regulations and as established by the employer.

Occupational Health and Safety Regulations, 1996
S.S., c. O-1.1, Reg 1

Part XII Scaffolds, Aerial Devices, Elevating Work Platforms and Temporary Supporting Structures

Section 168 Interpretation

168. In this Part:

(a) "aerial device" means a vehicle-mounted telescoping or articulating unit that is used to position a worker at an elevated worksite, and includes a work basket or bucket, an aerial ladder, an extendable and articulating boom platform, a vertical tower and any combination of those devices;

(b) "base plate" means a device that is attached to the base of a scaffold upright and that is used to distribute the vertical load over a larger area of the sill;

(c) "bearer" means a horizontal scaffold member on which the platform rests and that may be supported by ledgers, and includes transoms and joists;

(d) "brace" means a scaffold member fastened diagonally to the uprights across the vertical faces of the scaffold to provide stability against lateral movement of the scaffold;

(e) "bracket scaffold" means a platform that is supported by two or more triangular brackets projecting out from a structure to which the brackets are securely fastened;

(f) "double-pole scaffold" means a platform that is supported by bearers attached to a double row of braced uprights;

(g) "elevating work platform" means a work platform that can be self-elevated to overhead worksites, and includes an elevating rolling work platform, a self-propelled elevating work platform and a boom-type elevating work platform;

(h) "flyform deck panel" means a temporary supporting structure that:

(i) is used as a modular falsework;

(ii) is intended to be moved; and

(iii) is capable of being moved from floor to floor and re-used during a construction project;

(i) "half-horse scaffold" means a platform that is supported by two or more braced, splayed supports resting in or on the structure;

(j) "heavy-duty scaffold" means a scaffold that is intended to support workers, equipment and stored or stacked materials and that is designed to support the minimum load identified in clause 172(1)(b);

(k) "ladderjack scaffold" means a platform that is supported by brackets attached to ladders;

(l) "ledger" means a horizontal scaffold member extending from upright to upright that may support the bearers, and includes runners, stringers and ribbons;

(m) "light-duty scaffold" means a scaffold that is intended to support workers and materials for current use only, with no storage of other materials except the worker's tools, and that is designed to support the load identified in clause 172(1)(a);

(n) "maximum load" means the maximum actual load that a scaffold is designed to support or resist in use, and includes the working load, the actual weight of all the components of the scaffold, wind, environmental conditions and all other loads that may reasonably be anticipated;

(o) "modular scaffold" means a platform that is supported by uprights with fixed attachment points for standard-sized ledgers, bracing and accessories;

(p) "needle-beam scaffold" means a platform that is supported by parallel horizontal beams suspended by ropes attached to overhead anchors;

(q) "outrigger scaffold" means a platform that is supported by rigid members that are cantilevered out from the structure or vertical supports;

(r) "personnel lifting unit" means a work platform suspended by rigging from a crane or hoist that is used to position a worker at an elevated worksite, and includes a manbasket and work basket;

(s) "rolling scaffold" means a freestanding scaffold that is equipped with castors or wheels at the base of the scaffold;

(t) "scaffold" means a temporary elevated platform and the platform's supporting structure that are designed to support workers and hand tools, or workers, equipment and materials;

(u) "sill" means a wood, concrete or metal footing used to distribute the load from a standard, an upright or a base plate of a scaffold to the ground;

(v) "single-pole scaffold" means a platform that is supported by bearers attached at the outer end to a single row of braced uprights and at the inner end to the structure;

(w) "suspended outrigger scaffold" means a scaffold with a working platform that is suspended by wooden vertical members from rigid horizontal members that are cantilevered out from the structure;

(x) "suspended powered scaffold" means a platform that is suspended from overhead supports by ropes or cables and equipped with winches or pulley blocks so that the scaffold can be moved, and includes a boatswain's chair, work basket, work cage, swingstage or other similar scaffold;

(y) "suspended scaffold" means a platform that is supported by four wire ropes suspended from members that are cantilevered out from the structure;

(z) "temporary supporting structure" means a falsework, form, flyform deck panel, shoring, brace or cable that is used to support a structure temporarily or to stabilize materials or earthworks until the materials or earthworks are self-supporting or the instability is otherwise overcome, and includes metal scaffold components;

(aa) "tube and clamp scaffold" means a platform that is supported by steel or aluminum tubes with wedge or bolt clamp connectors and accessories;

(bb) "tubular frame scaffold" means a platform that is supported by welded tubular frames, cross-braces and accessories;

(cc) "upright" means a vertical scaffold member that transmits the load to the ground, and includes posts, verticals and standards;

(dd) "working load" means the total of the loads from workers, materials, equipment and work processes.

Section 192 Aerial devices and elevating work platforms

192. (1) An employer or contractor shall ensure that:

(a) an aerial device, elevating work platform or personnel lifting unit is designed, constructed, erected, operated and maintained in accordance with an approved standard; or

(b) a professional engineer has certified that:

(i) an aerial device, elevating work platform or personnel lifting unit and its elevating system and mountings are safe for the purpose of raising workers and loads; and

(ii) the components of an aerial device, elevating work platform or personnel lifting unit and its elevating system and mountings are designed in accordance with an approved standard.

(2) An employer or contractor shall not require or permit a worker to be raised or lowered by any aerial device or elevating work platform or to work from a device or platform held in an elevated position unless:

(a) there is an adequate and suitable means of communication between the worker operating the controls and the worker raised on the platform, if they are not the same person;

(b) the elevating mechanism is designed so that, if any failure of the mechanism occurs, the platform will descend in a controlled manner so that no worker on the platform will be endangered;

(c) the controls are designed so that the platform will be moved only when direct pressure is applied to the controls;

(d) the drive mechanism of any operation for moving the platform is positive and does not rely on gravity;

(e) road traffic conditions, environmental conditions, overhead wires, cables and other obstructions do not create a danger to the worker;

(f) the brakes of the aerial device or elevating work platform are engaged, except when operated in accordance with manufacturer's recommendations;

(g) if the aerial device or elevating work platform is equipped with outriggers, the outriggers are set;

(h) pursuant to clause (i), the worker is provided with and is required to use a personal fall arrest system that meets the requirements of Part VII; and

(i) the aerial device or elevating work platform is equipped with a lanyard attachment point that is:

(i) designed and constructed to an approved standard; or

(ii) certified as safe by a professional engineer and installed and used in accordance with that design.

(3) Notwithstanding any other provision in this section but subject to section 465, an employer or contractor shall not require or permit a worker working on an exposed energized high voltage electrical conductor to work from an aerial device or elevating work platform unless the controls are operated by the worker on the device or platform.

(4) Where a worker leaves an aerial device or elevating work platform parked or unattended, an employer or contractor shall ensure that the device or platform:

(a) is locked or rendered inoperative; or

(b) is fully lowered and retracted with all hydraulic systems in the neutral position or incapable of operating by moving the controls.

(5) An employer or contractor shall ensure that:

(a) a worker who operates an aerial device or elevating work platform is trained to operate the device or platform safely; and

(b) the training includes the manufacturer's instructions and recommendations, the load limitations, the proper use of all controls and any limitations on the surfaces on which the device or platform is designed to be used.

(5.1) An employer or contractor shall ensure that, while a worker is on a work platform mounted on a forklift and the forklift is in the raised position, the operator:

(a) remains at the controls; and

(b) does not drive the forklift.

(6) An employer or contractor shall ensure that the manufacturer's operating manual for the aerial device or elevating work platform is kept with the device or platform at all times.

[Sask. Reg. 67/2007, s. 20]

Section 193 Maintenance and inspection

193. (1) An employer, contractor, owner or supplier shall ensure that only competent persons maintain and inspect an aerial device, elevating work platform, suspended powered platform, personnel lifting unit or scaffold to which section 177 applies.

(2) An employer, contractor, owner or supplier shall ensure that a maintenance and inspection record tag:

(a) is provided for an aerial device, elevating work platform, suspended powered scaffold, personnel lifting unit or scaffold to which section 177 applies, and is attached to the device, platform, unit or scaffold near the operator's station; and

(b) has the following recorded on it:

(i) the date of the last maintenance;

(ii) the name and signature of the person who performed the maintenance; and

(iii) an indication that the maintenance has been carried out in accordance with the manufacturer's recommendations.