if it is part of a switchback access route.Ī vertical rise greater than 6 in. x 5 ft.įor example, a segment with a running slope of 1V:12H, or 8.33% will require a 5 ft. If a turn is required the landing must be 5 ft. The landing will be at least the width of the ramp with a minimum length of 60 in. Examples of various slopes and ramp lengths are shown in Figure 642.9.1.Ī landing will be located at the top and bottom of all ramps and between segments that have a 30 in. The maximum rise in any run will be 30 in. Clear documentation of any exceptions should be kept in the project file. In an alteration project if it is technically infeasible to meet the running slope requirement, every effort should be made to flatten the slope as much as possible and provide landings where necessary. Although the maximum running slope of a ramp in new construction is 1V:12H (8.33%), as discussed before, all sidewalks are to be designed with the least running slope possible. The cross slope for all ramps is to be 1%, but a maximum of 2.0% is allowed by ADA standards. Ramps typically occur on an accessible route leading to a facility or otherwise separated from the street. If the sidewalk is adjacent to the street or separated by a narrow planting strip, the sidewalk grade may be equal to the grade of the street and not be considered a ramp. When the running slope, or grade, of a sidewalk exceeds 5% it is a ramp. 4 642.9.4 Side Streets and Driveway Crossings.2.5 642.9.2.5 Types of Curb Ramps and Design Applications.1 642.9.1 Slope and Rise of Sidewalk Ramps.
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