Code Library › Volume 1 › Section 6.3 — Ventilation Systems

PART 6 — HEATING, VENTILATING AND AIR-CONDITIONINGUpdated for the 2024 Ontario Building Code

6.3.3.4.Access Ladders

(1) Access ladders for chimneys, when provided, shall consist of steel or bronze rungs, built into the walls of the
  chimneys.

  (2) Rungs for external ladders shall begin at not less than 2.5 m from ground level.

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.