Trestle scaffolding definition portable#
Use restrictionsġ3.8 (1)Ě worker must not work from the top 2 rungs of a portable single or extension ladder or the top 2 steps of a step ladder unless permitted by the manufacturer. Footingġ3.7Ě portable single or extension ladder must be positioned, and if necessary secured, to ensure stability during use. Lengthġ3.6Ě ladder must be of sufficient length to project approximately 1 m (3 ft) above the level of the upper landing to which it provides access, unless there is limited clearance and the ladder is adequately secured. (b) have the lower ends of the ladder side rails rest on a firm and level base and the upper support of the siderails must be on a bearing surface strong enough to safely withstand the applied loads. (a) be placed so that the horizontal distance from the base to the vertical plane of support is approximately 1/4 of the ladder length between supports, and Inclination and supportġ3.5 When in use, a portable single or extension ladder must Inspectionġ3.4Ě portable ladder must be inspected before use, and a ladder with a loose, broken or missing rung, a split side rail, or other hazardous defect must be removed from service. Standard Grading Rules for Canadian Lumber, or other grading rules acceptable toġ3.3Ě protective coating applied to a wooden ladder, other than a small amount for identification purposes, must be transparent to allow any defects to be discovered by inspection. (ii) graded to National Lumber Grades Authority Species to be limited to Douglas fir-larch, hemlock-fir, spruce-pine-fir, or (i) from lumber graded Number 2 or better and (h) ladder components made from timber materials
Trestle scaffolding definition full#
Spaced, and be 107 cm to 127 cm (42 in to 50 in) wide, and have continuousĬleats which extend the full width of the ladder
(g) a double cleat ladder must have 3 rails evenly Must be filled with close fitting and well secured filler pieces that are the (f) the spaces on the side rails between the cleats (4 in) cleats, and two similar nails on each end of the 64 mm (3 in) cleats The side rails, using three 57 mm (2 1/4 in) wire nails on each end of the 89 mm (ii) nailed directly onto the smaller surfaces of (ii) 19 mm x 89 mm (1 in x 4 in nominal) for ladder (i) 19 mm x 64 mm (1 in x 3 in nominal) for ladder Rails must not be less than 38 cm (15 in) nor more than 50 cm (20 in) (c) the distance between the inner faces of the side (b) side rails must not be notched, dapped, tapered
Lengths from 5 m to 7.3 m (16 ft to 24 ft) (ii) 38 mm x 140 mm (2 in x 6 in nominal) for (i) 38 mm x 89 mm (2 in x 4 in nominal) for lengths
Job site must meet the following minimum requirements: Job built laddersġ3.2 A portable wooden ladder made at the (2)Ě manufactured portable ladder must be marked for grade and use, and must be used in accordance with the manufacturer's instructions. (d) other standard acceptable to the board. (c) ANSI Standard A14.2-1990, Safety Requirements for Portable Metal Ladders, or (b) ANSI Standard A14.1-1990, Safety Requirements for Portable Wood Ladders, (a) CSA Standard CAN3-Z11-M81, Portable Ladders, Window Cleaning and Similar Building Maintenanceġ3.1 (1)Ğxcept as otherwise permitted by this Part, portable ladder design, construction and use must meet the requirements of Work Platforms Supported by a Crane or Hoist Part 13 - Ladders, Scaffolds and Temporary Work Platformsįree Standing Tower and Rolling Scaffolds Workers Compensation Act OCCUPATIONAL HEALTH AND SAFETY REGULATION For the most current information, click here. This archived regulation consolidation is current to Decemand includes changes enacted and in force by that date.
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