OHS Code Explanation Guide

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


  • Section 326 requires employers to visually inspect and tag all site-built scaffolds before initial use and at least every 21 calendar days while in use. Scaffold tag colours are green for “Safe for Use”, yellow for “Caution: Potential or Unusual Hazard”, and red for “Unsafe for Use”.
  • Section 347 lists numerous standards applicable to elevating platforms and aerial devices. Elevating platforms and aerial devices must comply with the Canadian Standards Association (CSA) or American National Standards Institute (ANSI) standards referenced in this section.
  • Section 349 presents requirements for fork-mounted work platforms intended to support a worker. The section also prohibits workers from being on these platform while the powered mobile equipment the platform is attached to is moving along the ground.
  • Section 351 requires a professional engineer to certify a boatswain’s chair if it is not commercially manufactured.