OHS Code

Published Date: July 01, 2009
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Part 23 Scaffolds and Temporary Work Platforms

Section 338 Outrigger scaffolds

(1) This section applies to outrigger scaffolds, including suspended outrigger scaffolds.

(2) If a reference in this section is made to lumber, a material that has properties equal to or greater than those of lumber may be used in its place.

(3) An employer must ensure that

(a) thrustouts are constructed of lumber that is 89 millimetres by 140 millimetres and placed on their edge,

(b) thrustouts do not extend more than 2 metres beyond the edge of the bearing surface,

(c) thrustouts are securely braced at the fulcrum point against movement or upset,

(d) the inboard ends of thrustouts are securely anchored against horizontal or vertical movement or upset,

(e) the inboard portion from the fulcrum point to the point of anchorage is not less than 1.5 times the length of the outboard portion,

(f) the maximum distance between thrustouts is 2.3 metres,

(g) if a working platform is suspended or thrust out, the platform is

(i) supported by vertical lumber hangers that are 38 millimetres by 140 millimetres or larger and not more than 3 metres long secured to the side of each thrustout and extending at least 300 millimetres above the top of each thrustout, and

(ii) secured to a block that rests on the top edge of each thrustout as an additional support,

(h) a suspended platform is supported by lumber beams that are 38 millimetres by 140 millimetres that are

(i) secured to the vertical hangers at least 300 millimetres above the bottom of the hangers, and

(ii) resting on blocks that are secured to the side of the hangers below each beam as an additional support,

(i) working platforms are completely planked between the hangers, and

(j) a suspended platform is braced to prevent swaying.

(4) An employer must ensure that

(a) counterweights are not used,

(b) stops to prevent lateral movement of the hangers are fixed to

(i) the thrustout and block referred to in subsection 3(g)(ii),

(ii) the ledgers and the blocks referred to in subsection (3)(h), and

(c) materials are not stored on outrigger scaffolds.