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Suspended Work Platforms and Boatswain’s Chairs

interpretation and application

136.1 In sections 137 to 142.06,

“allowable suspended load” means the combined weight of a suspended work platform or boatswain’s chair, the hoisting device or devices, the rated platform capacity and the suspended portion of the suspension line or lines; (charge suspendue admissible”)

“anchorage connector” means a component or a system of components of a fixed support that secures a suspended work platform or boatswain’s chair and its associated suspension lines and lifelines to the fixed support; (“connecteur d’ancrage”)

“CSA Standard Z271-10” means Canadian Standards Association (CSA) Standard Z271-10, Safety Code for Suspended Platforms; (“norme CSA Z271-10”)

“work platform” means a built or manufactured work surface that, as the context requires, is intended to be used as or is in use as the work area of a suspended work platform system, but does not include a boatswain’s chair. (“plateforme de travail”) O. Reg. 242/16, s. 11.

136.2 Sections 137 to 142.06 do not apply to multi-point suspended work platforms. O. Reg. 242/16, s. 11.

general requirements: design

137. (1) Every suspended work platform system or powered boatswain’s chair, including all components and connections of the suspended work platform system or boatswain’s chair, shall be designed by a professional engineer in accordance with,

(a) good engineering practice;

(b) CSA Standard Z271-10, with the exception of clauses 6.1.1 (b) and 6.1.2;

(c) the requirements of this section; and

(d) for a suspended work platform, the requirements of section 137.1. O. Reg. 242/16, s. 11.

(2) For the purposes of clause (1) (b), every reference to the National Building Code of Canada in CSA Standard Z271-10 shall be deemed to be a reference to the Building Code. O. Reg. 242/16, s. 11.

(3) Every suspended work platform system or powered boatswain’s chair shall be designed to be able to support or resist,

(a) the rated platform capacity; and

(b) any other loads likely to be applied to it, including the loads specified in clause 6.1.5 (Design loads from forces imposed on a platform) of CSA Standard Z271-10. O. Reg. 242/16, s. 11.

(4) The design of a suspended work platform system or powered boatswain’s chair shall take into account the potential increased loads due to wind on all components of the suspended work platform system or powered boatswain’s chair if shielding, tarpaulins, enclosures, signs, banners or other similar items were used or attached. O. Reg. 242/16, s. 11.

(5) The design of a work platform or boatswain’s chair shall use the factored load combination calculated in accordance with subsection (6). O. Reg. 242/16, s. 11.

(6) The factored load combination shall be calculated as follows:

ρ(αDD + γαLL)

where,

ρ is an impact factor of 1.25,

αD is a dead load factor 1.25,

D is the dead load,

γ is an importance factor of 1.9,

αL is a live load factor of 1.5, and

L is the live load. O. Reg. 242/16, s. 11.

137.1 (1) In addition to the requirements set out in section 137, a suspended work platform shall be designed in accordance with the requirements of this section. O. Reg. 242/16, s. 11.

(2) A work platform shall not have a span of greater than 30 metres between adjacent points of suspension. O. Reg. 242/16, s. 11.

(3) The rated platform capacity for a suspended work platform shall use the relevant minimum live load determined as follows:

1. If the span of the work platform between adjacent points of suspension is 12 metres or less, the minimum live load shall be 340 kilograms.

2. If the span of the work platform between adjacent points of suspension is greater than 12 metres but not more than 15 metres, the minimum live load shall be 450 kilograms.

3. If the span of the work platform between adjacent points of suspension is greater than 15 metres but not more than 20 metres, the minimum live load shall be 680 kilograms.

4. If the span of the work platform between adjacent points of suspension is greater than 20 metres but not more than 25 metres, the minimum live load shall be 900 kilograms.

5. If the span of the work platform between adjacent points of suspension is greater than 25 metres but not more than 30 metres, the minimum live load shall be 1,130 kilograms. O. Reg. 242/16, s. 11.

(4) There shall be an additional load allowance for any construction debris or abrasive blasting grit to a depth of at least 25 millimetres and for other materials that may accumulate or be placed on the work platform as a result of the work. O. Reg. 242/16, s. 11.

(5) In the case of a modular suspended work platform system, all connections used to transfer a load from one module to another shall be designed to withstand at least the design loads as specified in this section, and any other external loads or forces. O. Reg. 242/16, s. 11.

(6) Despite section 26.3, a guardrail system on a work platform shall meet the requirements of clause 6.4 (Guardrail System) of CSA Standard Z271-10, with the exception of clause 6.4.1 (b). O. Reg. 242/16, s. 11.

137.2 Design drawings for a work platform shall,

(a) set out the size and specifications of all the components of the work platform, including the type and grade of all materials to be used;

(b) state the maximum rated platform capacity of the work platform;

(c) state welding specifications for all welds used on the work platform, including weld length, weld locations and welding fillers to be used; and

(d) identify all critical welds used on the work platform. O. Reg. 242/16, s. 11.

137.3 (1) A work platform shall not be used unless the requirements of this section have been satisfied. O. Reg. 242/16, s. 11.

(2) In the case of a work platform designed before January 1, 2017, a professional engineer shall prepare a report that confirms that the structural integrity of the work platform is at least equal to the structural integrity of a work platform designed in accordance with sections 137 and 137.1. O. Reg. 242/16, s. 11.

(3) In the case of a work platform designed on or after January 1, 2017, a professional engineer shall prepare a report that,

(a) confirms that the work platform meets the requirements of sections 137 and 137.1;

(b) confirms that the suspended work platform’s design and configuration have been tested to and meet the performance requirements set out in sections 7 to 11 of the ANSI/UL 1322-2004 Standard, “Fabricated Scaffold Planks and Stages”, for the rated platform capacity and worst-case configurations;

(c) provides the results of the tests described in clause (b);

(d) subject to subsection (4), provides proof that the manufacturer of a suspended work platform or suspended work platform module has been certified to International Standard ISO 9001, Quality management systems – Requirements; and

(e) includes, if required under subsection (4), the quality assurance report described in clause (4) (c). O. Reg. 242/16, s. 11.

(4) If there is no proof available that the manufacturer has been certified to ISO 9001, a professional engineer shall,

(a) ensure that every critical weld of the work platform is subjected to a non-destructive test;

(b) examine all components of the work platform to ensure they are manufactured in accordance with the design drawings referred to in section 137.2;

(c) prepare a written quality assurance report that,

(i) confirms that every critical weld and every structural component referred to in subsection 139.1 (2) is correctly manufactured and has no defects, and

(ii) includes the results of non-destructive tests described in clause (a) and the examination described in clause (b). O. Reg. 242/16, s. 11.

(5) The work platform shall be assembled in accordance with the manufacturer’s instructions for assembly. O. Reg. 242/16, s. 11.

(6) While a work platform is in use at a project, the employer shall,

(a) make available to an inspector on request, the design drawings for the work platform; and

(b) keep at the project and make available to an inspector on request, the report prepared under subsection (2) or (3) and the manufacturer’s instructions for assembly of the work platform. O. Reg. 242/16, s. 11.

general requirements: worker training

138. (1) An employer shall ensure that a worker successfully completes a training program that meets the requirements set out in subsection (2) at the following times:

1. Before the worker uses a suspended work platform system or boatswain’s chair for the first time.

2. As often as is necessary, but at least every three years, after the worker uses a suspended work platform system or boatswain’s chair for the first time. O. Reg. 242/16, s. 11.

(2) The training program referred to in subsection (1) shall,

(a) consist of adequate oral and written instruction for using a suspended work platform system or boatswain’s chair, including instruction on,

(i) the regulations under the Act that apply to the work,

(ii) fall hazards related to the use of the suspended work platform system or boatswain’s chair,

(iii) selecting, putting on, using and inspecting personal protective equipment, and its components, that the worker is required to wear,

(iv) identifying and using fixed supports for a suspended work platform system or boatswain’s chair and for the worker’s fall arrest system,

(v) the components, functions and limitations of a suspended work platform system or boatswain’s chair, tiebacks and operational controls,

(vi) reading and using roof plans and work plans,

(vii) the load limitations of the suspended work platform system or boatswain’s chair, and

(viii) elements of emergency rescue from a suspended work platform system or boatswain’s chair; and

(b) require the worker to demonstrate proficiency in,

(i) selecting, putting on, using and inspecting the personal protective equipment the worker is required to use,

(ii) rigging procedures and tying adequate knots, 

(iii) locating fixed supports that are identified in a roof plan,

(iv) safely operating the suspended work platform system or boatswain’s chair, and

(v) operating the controls of the suspended work platform system or boatswain’s chair in accordance with the manufacturer’s instructions. O. Reg. 242/16, s. 11.

(3) The employer shall ensure that the person who provides the training program referred to in subsection (1) prepares and signs a written record for every worker who successfully completes the program and shall provide such written proof to the worker. O. Reg. 242/16, s. 11.

(4) A worker shall have the written proof described in subsection (3) readily available at a project. O. Reg. 242/16, s. 11.

138.1 (1) An employer shall designate a competent worker to be responsible for the installation and inspection of a suspended work platform system or boatswain’s chair before it is put into service for the first time. O. Reg. 242/16, s. 11.

(2) The employer shall ensure that the competent worker successfully completes a training program that meets the requirements set out in subsection (3) at the following times:

1. Before the competent worker installs or inspects the installation of a suspended work platform or boatswain’s chair for the first time.

2. As often as is necessary, but at least every three years, after the worker installs or inspects the installation of a suspended work platform or boatswain’s chair for the first time. O. Reg. 242/16, s. 11.

(3) The training program referred to in subsection (2) shall,

(a) consist of adequate oral and written instruction on,

(i) rigging,

(ii) methods to secure beams and equipment,

(iii) fixed supports,

(iv) principles of suspension lines, hoisting devices and load limits,

(v) manufacturers’ instructions for assembling, installing and disassembling suspended work platform systems or boatswain’s chairs,

(vi) reading and using roof plans and work plans,

(vii) securing suspended work platform systems or boatswain’s chairs to the face of a building, and

(viii) electrical systems; and

(b) require the competent worker to demonstrate proficiency in,

(i) installing and torqueing rigging hardware in accordance with the manufacturer’s instructions,

(ii) inspecting cable and terminations in accordance with the manufacturer’s instructions,

(iii) tying of adequate numbers of different knots,

(iv) properly setting up a suspended work platform system or boatswain’s chair in accordance with roof plans, work plans and the manufacturer’s instructions, including,

(A) selection and use of fixed supports,

(B) set up of equipment,

(C) use of hoists, including reeving cables,

(D) use of descent controls and emergency controls,

(E) impact of different work plans on set up of equipment, and

(F) protection of public ways. O. Reg. 242/16, s. 11; O. Reg. 142/17, s. 16.

(4) The employer shall ensure that the person who provides the training program referred to in subsection (2) prepares and signs a written record for every competent worker who successfully completes the program and shall provide such written proof to the competent worker. O. Reg. 242/16, s. 11.

(5) A competent worker shall have the written proof described in subsection (4) readily available at a project. O. Reg. 242/16, s. 11.

general requirements: testing

139. (1) An employer shall ensure that, prior to the first use of a suspended work platform system at a project, the entire system, including its suspension lines, has been inspected, tested and maintained in accordance with this Regulation, the manufacturer’s instructions, and clause 11 (Inspection and Testing) and Clause 12 (Maintenance) of CSA Standard Z271-10. O. Reg. 242/16, s. 11.

(2) The employer shall ensure that the inspection, testing and maintenance referred to in subsection (1) is completed by,

(a) a competent worker; or

(b) if the CSA Standard Z271-10 requires the inspection or test be performed by a person with specific qualifications, such person. O. Reg. 242/16, s. 11.

139.1 (1) Every supplier of and every employer who owns or uses a work platform shall ensure that the testing requirements in this section are met. O. Reg. 242/16, s. 11.

(2) For the purposes of this section, the types of structural components of a work platform are categorized in the following groups:

1. Group 1, which is composed of trusses, corner or angled sections and platform modules.

2. Group 2, which is composed of stirrups, module connectors and end frames. O. Reg. 242/16, s. 11.

(3) At least annually, a representative sample of each type of structural component shall be randomly selected and subjected to non-destructive testing in accordance with the following:

1. For each type of Group 1 structural component, the representative sample shall be composed of the number set out in Column 2 of the Table to this subsection opposite the total number of that type of component, set out in Column 1, in the supplier’s or employer’s entire inventory or fleet of suspended work platforms.

2. For each type of Group 2 structural component, the representative sample shall be composed of the number set out in Column 3 of the Table to this subsection opposite the total number of that type of component, set out in Column 1, in the supplier’s or employer’s entire inventory or fleet of suspended work platforms.

3. Every critical weld on each structural component selected as part of the representative sample shall be subjected to non-destructive testing.

TABLE

ItemColumn 1Total number of the type of structural component in a supplier or employer’s entire inventory or fleet of suspended work platformsColumn 2Group 1: number of representative samples of the type of structural component to be testedColumn 3Group 2: number of representative samples of the type of structural component to be tested
1.2-1522
2.16-5035
3.51-15058
4.151-500813
5.500 or greater1320

O. Reg. 242/16, s. 11.

(4) If any defect is found as a result of the testing conducted under subsection (3), a professional engineer shall review the interpretation of the test results to determine,

(a) whether the defect affects the structural integrity of the structural component; and

(b) if the defect does affect the structural integrity of the structural component, whether the defective component is to be rejected from further use permanently or pending its repair. O. Reg. 242/16, s. 11; O. Reg. 142/17, s. 17 (1).

(5) The professional engineer shall prepare a written report of the review and determination made under subsection (4). O. Reg. 242/16, s. 11.

(6) If a defective structural component is rejected from further use, either permanently or pending repair, a representative sample that is composed of four times the number of each type of structural component that composed the original representative sample under subsection (3) shall be subjected to testing described in paragraph 3 of subsection (3). O. Reg. 242/16, s. 11.

(7) If any defect is found as a result of the testing conducted under subsection (6), subsections (4) to (6) apply, with necessary modifications. O. Reg. 242/16, s. 11; O. Reg. 142/17, s. 17 (2).

(8) All other parts of a suspended work platform not listed in subsection (2) shall be inspected for damage at least once within the 12-month period preceding its use on a project and at least once annually while in use on a project. O. Reg. 242/16, s. 11.

general requirements: equipment

140. (1) An employer who uses a suspended work platform system shall ensure that there are permanent equipment logs respecting components of the suspended work platform system and that the logs,

(a) comply with clause 13 (Equipment Log) of CSA Standard Z271-10; and

(b) include a record of the inspections, tests, repairs, modifications and maintenance performed on the components. O. Reg. 242/16, s. 11.

(2) The employer shall make the permanent equipment logs available to an inspector on request. O. Reg. 242/16, s. 11.

pre-use requirements: fixed supports, roof plans, work plans and installation

141. (1) The supplier of or employer who owns a suspended work platform system shall ensure that all of its components are marked or labelled in accordance with clause 10.2 (Markings) of CSA Standard Z271-10. O. Reg. 242/16, s. 11.

(2) The supplier of or employer who owns a suspended work platform system shall ensure that each of the following structural components of every work platform is marked with a unique identifier:

1. A truss.

2. An end frame.

3. A stirrup.

4. A module connector.

5. A corner or angled section. O. Reg. 242/16, s. 11.

(3) Despite subsection (2), if a work platform module is manufactured as a single unit, it may be marked with a single unique identifier. O. Reg. 242/16, s. 11.

141.1 (1) Every fixed support shall be designed by a professional engineer in accordance with the requirements of this section. O. Reg. 242/16, s. 11.

(2) A fixed support shall be designed and constructed to support all loads to which it may be subjected. O. Reg. 242/16, s. 11.

(3) The design of a fixed support shall use the factored loads calculated in accordance with subsection (4). O. Reg. 242/16, s. 11.

(4) The following values of load factors, as described in the provisions of the Building Code that address Limit States Design, shall be applied to calculate the factored loads for an outrigger and supporting structure, excluding anchorage connectors:

1. Live load factor = 3.0.

2. Dead load factor = 1.25. O. Reg. 242/16, s. 11; O. Reg. 142/17, s. 18.

(5) A component of a fixed support that may be subject to overturning shall be designed and constructed to support at least four times its allowable suspended load or force. O. Reg. 242/16, s. 11.

(6) Subject to subsection (7), an anchorage connector shall be designed to resist,

(a) the application of 22.2 kilonewtons in any direction without fracture of any component or pullout from the fixed support; and

(b) a test loading of 11.1 kilonewtons without permanent deformation of any component when subjected to the test loading in the direction or directions that generate the most critical effect on the fixed support with respect to stability and strength. O. Reg. 242/16, s. 11.

(7) For a suspended work platform system with a span between adjacent points of suspension of greater than 12 metres and up to 30 metres, the anchorage connectors for supporting the suspended work platform system shall be designed in accordance with good engineering practice to support the allowable suspended load and the minimum live loads for the length of the suspended work platform to be used, as set out in subsection 137.1 (3). O. Reg. 242/16, s. 11.

141.2 (1) Every owner of a building or structure where a suspended work platform system or boatswain’s chair is to be used shall ensure that there is a roof plan for the building or structure and ensure that the plan,

(a) contains drawings and layout diagrams that show the positions of all fixed supports on the building or structure;

(b) indicates whether the fixed supports are adequate for the purposes of attaching work platforms, boatswain’s chairs and lifelines;

(c) meets the requirements of clause 10.1.2 (Roof Plan) of CSA Standard Z271-10; and

(d) has been approved in writing by a professional engineer. O. Reg. 242/16, s. 11.

(2) The owner shall post a legible copy of the roof plan near every entrance to the roof or top level of the building or structure where the suspended work platform system or boatswain’s chair is to be used. O. Reg. 242/16, s. 11.

(3) The owner shall provide a copy of the roof plan to the constructor for a project at the building or structure. O. Reg. 242/16, s. 11.

(4) The constructor shall ensure that every employer whose workers are to use the suspended work platform system or boatswain’s chair at the building or structure has received a copy of the roof plan. O. Reg. 242/16, s. 11.

(5) No employer or constructor shall permit a worker to use a suspended work platform system or boatswain’s chair on a building or structure unless the employer or constructor has received a copy of the roof plan and, if required, the design drawings and written procedures prepared under subsection 141.3 (2). O. Reg. 242/16, s. 11.

141.3 (1) If the roof plan required under section 141.2 indicates that the fixed supports on the building or structure are not adequate for the purposes of attaching a suspended work platform system or boatswain’s chair and lifelines, if any, the owner shall provide the constructor for a project at the building or structure with any structural drawings for the building or structure that the owner has control over. O. Reg. 242/16, s. 11.

(2) The constructor shall ensure that a professional engineer prepares, using any structural drawings provided by the owner under subsection (1), design drawings and written procedures that indicate the manner in which the suspended work platform system or boatswain’s chair and lifelines, if any, must be supported from the building or structure during the relevant project. O. Reg. 242/16, s. 11.

(3) The constructor shall ensure that every employer whose workers are to use the suspended work platform system or boatswain’s chair and lifelines, if any, at the building or structure has received a copy of the design drawings and written procedures. O. Reg. 242/16, s. 11.