NBC 2025 Accessibility Ramp Slopes & Geometry: A Technical Guide for London, Ontario Construction
Sarah's Expert Insight
Senior Consultant at empcontracting.ca Inc.
"Adhering to the NBC 2025 ramp geometries is not just about legal compliance; it is about future-proofing London properties for an aging demographic and ensuring universal access. At empcontracting.ca Inc., your construction contractor in London, Ontario, we find that precise 1:12 slope execution combined with proper landing intervals significantly reduces long-term maintenance and increases the inclusive value of our local builds."
Understanding the latest requirements in the National Building Code of Canada (NBC) 2025 regarding accessibility ramps is critical for any commercial or residential project. These standards ensure safe and equitable access for all individuals, particularly those with mobility aids. When working with empcontracting.ca Inc. your construction contractor in London, Ontario, we ensure every ramp project exceeds these technical benchmarks.
Maximum Ramp Slopes and Dimensions
Under NBC 2025, the maximum allowable slope for a ramp in a barrier-free path of travel is 1:12 (8.3%). While this is the maximum permitted, the code encourages gentler slopes, such as 1:15 or 1:20, whenever space permits to reduce physical exertion for users.
Clear Width and Headroom
Ramps must maintain a minimum clear width of 900 mm between handrails. For high-traffic public areas, wider configurations may be required to allow for simultaneous two-way traffic. Additionally, a minimum vertical headroom of 2100 mm must be maintained throughout the entire length of the ramp.
Landing Requirements and Geometry
Landings are essential for safety, providing a level area for users to rest or maneuver. NBC 2025 stipulates that landings must be provided at the top and bottom of every ramp, at intervals not exceeding 9 meters for 1:12 slopes, and at any point where the ramp changes direction.
Landing Dimensions
- Minimum Length: 1500 mm.
- Turning Space: Where a ramp turns, the landing must be at least 1500 mm x 1500 mm to accommodate the turning radius of a wheelchair.
- Door Proximity: If a door swings onto a landing, it must not reduce the required clear area for maneuvering.
Handrails and Guards
To comply with NBC 2025, handrails must be installed on both sides of any ramp with a rise greater than 150 mm or a length greater than 2000 mm. Handrails must be continuous, ergonomically graspable, and installed at a height between 865 mm and 1070 mm.
Edge Protection
Ramps and landings must feature edge protection, such as a curb at least 50 mm high or a sturdy rail, to prevent mobility devices from accidentally slipping off the edge. This is a critical safety feature that empcontracting.ca Inc. your construction contractor in London, Ontario implements on every accessibility project.
Surface Finish and Slip Resistance
The NBC 2025 emphasizes that ramp surfaces must be firm, stable, and slip-resistant. In the London, Ontario climate, choosing materials that maintain traction during wet or icy conditions is vital for year-round accessibility and liability reduction.