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Grades and ElevationChanges

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Tactile Solution
Grades and ElevationChanges

Wherever possible, grades on roads and sidewalks should be designed so that the slope of pedestrian routes does not exceed 1:20.

• Wherever possible, accessible paths of travel should have a minimum number of curb cuts to keep the sidewalk as level as possible.

• Where elevation changes greater than 1:20 are necessary, and/or where steps are unavoidable, properly designed ramps suitable for persons using mobility aids must be provided in close proximity.

• Where steeply sloping landscaped areas are located adjacent to pedestrian routes and where slope exceeds 3:1(horizontal to vertical), a clear boundary edge; such as an up-stand curb or retaining wall, (minimum 150 mm high) is desirable as a locational aid for persons who have visual limitations. (See Figures 7 and 8)

• Where the grade drop-off adjacent to the sidewalk is 460 mm or more, a handrail or guard is recommended as an aid to persons with visual limitations. (See Figure 8)

Guards and Handrails

• Continuous handrails should be provided on both sides of all ramps or stairs, or wherever three or more steps are provided.

• Handrails should be of a smooth, easy to grip design, no more than 50 mm in diameter; and mounted between 865 mm and 965 mm (above stair nosings)

• A level section of the handrail should extend a minimum of300 mm beyond the top and bottom risers of all flights of stairs or ramps. (See Figure19) Note: Handrails on the inside curve of stairs or ramps need not extend more than 100 mm.

• Handrail ends should terminate either by turning down or by going into the wall as an aid to persons who have visual limitations.

• Guards are required on both ramps and stairs wherever height differences are significant.

• Guards and/or handrails were provided on terraces or viewing platforms, should be designed so that a seated person (e.g., wheelchair user) can see under the handrail or guard.

• Handrails and/or guards should not be located within1000 mm of any roadway.

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