Wetland Trail Design and Construction
Appendix B-Slope Conversion Table
| Slope Conversion Table | ||
|---|---|---|
| Percent grade | ¹Slope | ²Pitch |
| 0.5 | 1 ft per 200 ft | 1/16 in per 1 ft |
| 1 | 1 ft per 100 ft | 1/8 in per 1 ft |
| 2 | 1 ft per 50 ft | ¼ in per 1 ft |
| 2.5 | 1 ft per 40 ft | 5/16 in per 1 ft |
| 3 | 1 ft per 33 ft | 3/8 in per 1 ft |
| 3.3 | 1 ft per 30 ft | 7/16 in per 1 ft |
| 4 | 1 ft per 25 ft | ½ in per 1 ft |
| 5 | 1 ft per 20 ft | 5/8 in per 1 ft |
| 6 | 1 ft per 16.5 ft | ¾ in per 1 ft |
| 7 | 1 ft per 14.3 ft | 7/8 in per 1 ft |
| 8 | 1 ft per 12.5 ft | 1 in per 1 ft |
| 8.33 | 1 ft per 12 ft | 1 in per 1 ft |
¹One unit of climb or descent per 100 units of horizontal distance.
²Number of vertical inches per horizontal foot. Vertical inches shown are rounded
off to the nearest one-sixteenth of an inch.
Maximum grade recommended for wood surface trails = 2 percent.
Maximum grade recommended for accessible trails = 5 percent.
Maximum grade recommended for accessible ramps = 8.33 percent.
