7.4.3 Slope.
Trail running slopes (grades) and cross slopes shall comply with sections 7.4.3.1 and 7.4.3.2.
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) |
7.4.3.2 Cross Slope.
The cross slope shall not exceed 1:20 (5 percent). Where the surface is paved or is elevated above the natural ground, the cross slope shall not be steeper than 1:48 (2 percent).
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