Rise
The maximum length of a run is determined by the rise (30 inches maximum) and the slope:
| Max. Rise | Slope | Max. Length | Max. Rise | Slope | Max. Length |
| 30 in. | 1:12 | 30 ft | 30 in. | 1:16 | 40 ft |
| 30 in. | 1:13 | 32.5 ft | 30 in. | 1:17 | 42.5 ft |
| 30 in. | 1:14 | 35 ft | 30 in. | 1:18 | 45 ft. |
| 30 in. | 1:15 | 37.5 ft. | 30 in. | 1:19 | 47.5 ft |
The number of runs per ramp is not limited although the more runs a ramp has the less usable it is. While intermediate landings offer resting points, they do not reduce the amount of force people using wheelchairs must exert traveling up ramps.
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