The CNBC (Canada mortgage and housing corporation) recommends that wheelchair ramps must have 1 inch of rise for every 12 inches in length known as run “Run: The horizontal length of a sloped surface”. This makes the required wheelchair slope a ratio of 1:12. If the person needs an easier slope, one could use a 1:16 or 1:20 but before taking such a decision, it is recommended to speak with your occupational therapist.
The switch back can be used when wanting to save space hence change the direction of the ramp, but the turns must be either 90 degrees or 180 degrees. If the direction change is 180 degrees, the wheelchair landing to make the turn must be twice as long as needed for a 90-degree turn and must NOT have a slope.
Barriers and Railings for commercial wheelchair ramps
A wheelchair ramp must have handrails if the run of a ramp rises more than 6 inches or if a projection extends 72 inches horizontally or more, this may vary according to your province. This handrail should extend to the landings as well. It is recommended, though not required, that a barrier at least 2 inches high be placed along the edges of the ramp. Although we follow the recommended design of wheelchair ramps it is mandatory to check with your local bylaws, your insurance and your occupational therapist.