Figure 16 is a set of two line drawings illustrating mid-block and corner parallel curb ramps in
perspective. The sidewalk ramps down to a level landing that is 5 feet minimum in length and
then slopes back up to sidewalk level. The landing must be a minimum of 4 feet wide in the
direction of travel, and may have a maximum cross slope of 1:48. A retaining curb may be needed
at the rear if adjacent grade does not follow the sidewalk slope down to the landing. A chart lists
the ramp lengths needed for a 1:12 slope at various street slopes from 1 to 5 percent. A diagonal
parallel ramp is located at an intersection.
The chart is as follows:
| Street Pitch |
| Ramp Length 1:12 |
| Low Side |
High Side |
| 1% |
5'-6" (1.7m) |
7'-2" (2.2m) |
| 2% |
5'-0" (1.5m) |
8'-4" (2.5m) |
| 3% |
4'-6" (1.4m) |
10'-0" (3.0m) |
| 4% |
4'-2" (1.3m) |
12'-6" (3.8m) |
| 5% |
3'-10" (1.2m) |
16'-8" (5.1m) |
|
