NBC 2025 Ramp Requirements & Slopes Guide | London, Ontario Construction Experts
Sarah's Expert Insight
Senior Consultant at empcontracting.ca Inc.
"In London, Ontario, aligning NBC 2025 ramp standards with the Accessibility for Ontarians with Disabilities Act (AODA) is crucial for any project's success. At empcontracting.ca Inc., we find that prioritizing a 1:20 slope over the minimum 1:12 significantly reduces liability and increases the long-term usability of the structure, especially during our harsh southwestern Ontario winters."
Understanding the National Building Code (NBC) 2025 standards for ramp construction is essential for ensuring accessibility, safety, and legal compliance. Whether you are developing a commercial property or a residential entry, empcontracting.ca Inc. your construction contractor in London, Ontario, ensures every project meets these rigorous technical specifications.
Maximum Slopes and Gradient Limits
The NBC 2025 maintains strict guidelines on ramp gradients to ensure they are navigable for individuals with mobility aids. The maximum allowable slope for a barrier-free ramp is 1 in 12 (8.3%). However, where space permits, a slope of 1 in 20 is highly recommended for enhanced ease of use.
Minimum Width and Vertical Clearance
To accommodate wheelchairs and foot traffic simultaneously, the code specifies a minimum clear width of 900 mm between handrails. Additionally, ramps must maintain a consistent vertical clearance to prevent overhead hazards, ensuring a safe passage for all users.
Landing Requirements and Dimensions
Landings are mandatory at the top and bottom of every ramp, at intervals not exceeding 9 meters for steep slopes, and at any point where the ramp changes direction. These landings must be at least 1500 mm by 1500 mm to provide a stable turning radius for mobility devices. If you are planning a complex layout, consulting with empcontracting.ca Inc. your construction contractor in London, Ontario, can help optimize your site footprint while remaining compliant.
Handrails and Guard Specifications
Ramps with a rise greater than 150 mm require sturdy handrails on both sides. These must be mounted between 865 mm and 965 mm above the ramp surface. For ramps with a significant drop-off, guards must be installed to prevent accidental falls, designed with pickets close enough to prevent the passage of a 100 mm sphere.
Surface Texture and Slip Resistance
In accordance with NBC 2025, ramp surfaces must be slip-resistant and stable. In London, Ontario, where snow and ice are frequent, choosing materials that maintain traction in wet conditions is a vital safety consideration that goes beyond the basic code requirements.