Where the trail grade exceeds 1:20 (5 percent), resting intervals shall be provided as specified in Table 7.4.3.1....
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7.4.4 Resting Intervals
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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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7.4.4.4 Turning Space
Where resting intervals are provided adjacent to the trail tread, a turning space complying with ABAAS section 304.3.2 shall be provided. ...
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1017.5 Tread Obstacles
Tread obstacles on trails, passing spaces, and resting intervals shall not exceed 1/2 inch (13 mm) in height measured vertically to the highest point....
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1017.5 Tread Obstacles
Tread obstacles on trails, passing spaces, and resting intervals shall not exceed 1/2 inch (13 mm) in height measured vertically to the highest point....
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11B-246.8 Nature trails
Nature trails and similar educational and informational areas shall be accessible to individuals with vision impairments by the provision of rope guidelines, raised Arabic numerals and symbols...
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11B-504.4 Tread surface
Stair treads shall comply with Section 11B-302. Changes in level, slopes exceeding 1:48, and detectable warnings shall not be permitted. Exception: Reserved....
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Openings [1017.6]
Openings are gaps in the surface of a trail....
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Treads and Risers: ADA Standard Section 504.2
Section 504.2 covers the current ADA Standards for the treads and risers on stairways.
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7.4.7 Openings
Openings in trail tread surfaces, trail resting spaces, and trail passing spaces shall be small enough to prevent passage of a 1/2 inch- (13 mm-) diameter sphere....
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7.4.3 Slope
Trail running slopes (grades) and cross slopes shall comply with sections 7.4.3.1 and 7.4.3.2....
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R408.4 Tread Surface
R408.4 Tread Surface. Stairway treads shall comply with R302.7. Changes in level are not permitted....
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7.4.12.1 Clear Width
Gate openings and openings in barriers for hiker passage shall provide a clear width of 36 inches (915 mm), complying with ODAAG, section 1017.3 Clear Tread Width....
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Can stair treads and risers be perforated?
Stair treads must meet requirements for floor or ground surfaces which specify that surface openings not allow passage of a sphere more than ½ inch in diameter (§302.3)....
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1017.4 Passing Spaces
Trails with a clear tread width less than 60 inches (1525 mm) shall provide passing spaces complying with 1017.4 at intervals of 1000 feet (300 m) maximum. ...
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1017.4 Passing Spaces
Trails with a clear tread width less than 60 inches (1525 mm) shall provide passing spaces complying with 1017.4 at intervals of 1000 feet (300 m) maximum....
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TREAD
TREAD. The horizontal part of a step....
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7.4.5 Passing Spaces
Trails with a clear tread width less than 60 inches (1525 mm) shall provide passing spaces complying with 7.4.5 at intervals of 1000 feet (300 m) maximum. ...
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11B-504.2 Treads and risers
All steps on a flight of stairs shall have uniform riser heights and uniform tread depths. Risers shall be 4 inches (102 mm) high minimum and 7 inches (178 mm) high maximum....
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11B-246.7 Trails and paths
Trails, paths and nature walk areas, or portions of them, shall be constructed with gradients permitting at least partial use by wheelchair occupants....
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Trail Classes
Trail Classes broadly organize trails by desired management characteristics and the level of development....
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7.2.2.1 Determining Impracticability
The combination of trail running slope (grade) and cross slope exceeds 1:2.5 (40 percent) for over a distance of 20 feet (6m). Limiting Factor 2. ...
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1017.4 Passing Spaces
This section requires passing spaces to be provided at intervals of 1000 feet maximum where the clear tread width of trails is less than 60 inches....
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Trail
For purposes of the FSTAG and FSORAG, a trail is a pedestrian route developed primarily for outdoor recreational hiking purposes. ...