2024 Ontario Building Code Guide to Means of Egress: Standards from empcontracting.ca Inc.
Sarah's Expert Insight
OBC Compliance Specialist
"Adhering to the 2.1m clear height and 1100mm corridor width is a critical compliance checkpoint we manage for multi-unit and commercial builds in London and Oakville. For our clients in Muskoka, the requirement for ice-free hotel exit stairs (9.9.2.6) is particularly vital, often requiring integrated heating systems or specialized architectural cover to mitigate the harsh Canadian winters and ensure guest safety."
Navigating the complexities of the 2024 Building Code Compendium is essential for ensuring the safety and legality of your build. As empcontracting.ca Inc. your construction contractor in London, Ontario, we specialize in implementing these technical requirements to ensure your project passes inspection and provides maximum safety for occupants.
Section 9.9.2: General Requirements for Egress
9.9.2.3. Limitations on Elevators and Windows
Under the OBC, elevators, slide escapes, and windows are generally excluded from being considered as part of a required means of egress. A specific exception exists for mercantile occupancies where casement windows of specific dimensions (1060 mm high by 560 mm wide) may serve as access to fire escapes, provided the sill height does not exceed 900 mm.
9.9.2.4. Principal Entrances and Stair Treads
Every principal entrance serving as a ground-level exit must meet strict exit design requirements, except for single dwelling units. Additionally, to prevent tripping hazards during emergencies, stair treads must be positioned at right angles to the direction of travel, ensuring a predictable path for evacuation.
9.9.2.6. Exterior Exit Stairs for Hotels
In hospitality environments, the code mandates that exterior exit stairs be designed to remain free of ice and snow accumulation, a critical factor for year-round safety in the Ontario climate.
Section 9.9.3: Dimensions of Means of Egress
9.9.3.2. & 9.9.3.3. Exit and Corridor Widths
The standard minimum width for exit facilities is 900 mm. However, public corridors and exit corridors require a wider clearance of at least 1100 mm to accommodate higher traffic volumes and emergency personnel.
9.9.3.4. Clear Height Mandates
Standard exits and access routes must maintain a minimum clear height of 2.1 m. For storage garages, the code allows a slightly lower clearance of 2 m. These measurements are vital for preventing head-room obstructions during an emergency egress scenario.
Disclaimer: This content is generated from the Ontario Building Code for educational purposes. Always consult with a licensed professional engineer or your local building department before starting any construction project in London, Ontario.