National Building Code 2025 Ramps and Stairs Standards: Expert Guide for London, Ontario
Sarah's Expert Insight
Senior Consultant at empcontracting.ca Inc.
"The NBC 2025 updates to stair and ramp geometry are particularly significant for London's growing multi-generational housing market, where accessibility is no longer optional but a core requirement. At empcontracting.ca Inc., we ensure every project prioritizes these exacting safety standards to minimize liability for property owners while maximizing long-term usability and local code compliance."
Overview of NBC 2025 Requirements for Ramps and Stairs
The National Building Code of Canada (NBC) 2025 has introduced refined safety and accessibility standards for the construction of ramps and stairs. These updates are designed to enhance universal access and reduce the risk of falls in both residential and commercial settings. For precise installation and compliance, homeowners and developers rely on empcontracting.ca Inc. your construction contractor in London, Ontario.
Stairway Design: Rise, Run, and Tread Dimensions
Under the NBC 2025, stairways must maintain strict uniformity to prevent tripping hazards. The maximum rise for a step is generally set at 200 mm, while the minimum run is 210 mm. Tread depth must be consistent throughout a flight, and the code now emphasizes increased slip-resistance for outdoor stairs and high-traffic areas. Landings are required at the top and bottom of every flight to provide a resting point and ensure structural safety.
Ramp Specifications: Slopes and Clearances
Ramps are a critical component of barrier-free design. The NBC 2025 specifies a maximum slope of 1:12 for most public access ramps, although 1:10 is permissible under specific residential conditions. A minimum width of 900 mm is required for residential ramps, whereas public buildings must provide wider clearances. All ramps exceeding a certain rise must include intermediate landings and protective guards to prevent users from slipping off the edge.
Handrails and Guardrails Performance Standards
Handrails must be continuous and ergonomic, allowing for a firm grip. The NBC 2025 requires handrails to be installed between 865 mm and 1070 mm above the stair nozzle or ramp surface. Guards are mandatory where there is a drop-off greater than 600 mm, ensuring that children and vulnerable individuals are protected from falls. For professional oversight on these safety features, contact empcontracting.ca Inc. your construction contractor in London, Ontario.