7.4.3.1 Running Slope (Grade).
The running slope (grade) of trail segments shall comply with this section and shall be consistent over the distances cited.
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Trail running slope (grade) of up to 1:20 (5 percent) is permitted for any distance.
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The running slope of any segment of a trail shall not be steeper than 1:8 (12 percent).
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No more than 30 percent of the total trail length may exceed a running slope (grade) of 1:12 (8.33 percent).
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Where the running slope (grade) of a segment of a trail is steeper than 1:20 (5 percent), the maximum length of the segment shall be in accordance with Table 7.4.3.1, and a resting interval complying with 7.4.4 shall be provided at each end of the segment.
Table 7.4.3.1 Trail Running Slope (Grade) and Resting Intervals
|
Running Slope of Trail Segment |
Maximum Length of Segment Between Resting Intervals |
|
| Steeper Than | But Not Steeper Than | |
|
1:20 (5 percent) |
1:12 (8.33 percent) |
200 feet (61 m) |
|
1:12 (8.33 percent) |
1:10 (10 percent) |
30 feet (9 m) |
|
1:10 (10 percent) |
1:8 (12 percent) |
10 feet (3050 mm) |
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