2024 Ontario Building Code Guide: Stair Landing and Handrail Requirements
Sarah's Expert Insight
OBC Compliance Specialist
"At empcontracting.ca Inc. your construction contractor in London, Ontario, we emphasize that landing and handrail compliance is the most common point of failure in safety inspections across Oakville and Muskoka. Ensuring that handrails meet the specific 'continuously graspable' dimensions and that landings provide the 1,100 mm clearance for straight runs is essential for both accessibility and passing your final OBC audit without costly retrofits."
Navigating the 2024 Ontario Building Code (OBC) is essential for any structural or renovation project. When working with empcontracting.ca Inc. your construction contractor in London, Ontario, you can be confident that your stairways, ramps, and exits meet every legal safety standard.
Section 3.4.6.4: Dimensional Requirements for Landings
Proper landing dimensions ensure safe egress and accessibility for all occupants. According to Sentence 3.4.6.4.(1), a landing must generally be at least as wide and as long as the width of the stairway it serves.
Exceptions for Straight and Minor Turn Stairways
For straight runs or turns less than 90 degrees, the code provides flexibility. The landing length need not exceed the lesser of the required stair width or 1,100 mm. This allows for optimized space management in both residential and commercial builds.
Ramp Intersections and Exit Travel
When a doorway or stairway empties onto a ramp, specific level areas are required to prevent trip hazards. If exiting through a side wall, a level area of at least 300 mm must be provided on either side of the opening. For end-wall exits, a 900 mm level area is mandatory.
Section 3.4.6.5: Handrail Regulations and Standards
Handrails are a critical safety component in the 2024 OBC. The requirements for the number and placement of handrails depend on the width and shape of the flight.
Handrail Placement and Intermediate Rails
Stairs under 1,100 mm in width require at least one handrail. However, handrails must be provided on both sides for stairs 1,100 mm or wider, curved flights, and all ramps. For very wide stairways, intermediate handrails must be installed so that a rail is always within 825 mm of any portion of the exit width.
Dimensions, Graspability, and Height
To ensure user safety, handrails must be 'continuously graspable.' This means they must have a circular cross-section between 30 mm and 50 mm, or a non-circular perimeter between 100 mm and 160 mm. The height must be maintained between 865 mm and 1,070 mm, measured vertically from the tread nosing or ramp surface.
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.