Section 504.4 covers the current ADA Standards for the tread surfaces on stairways.
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Tread Surface: ADA Standard Section 504.4
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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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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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504.4 Tread Surface
504.4 Tread Surface. Stair treads shall comply with 302. Changes in level are not permitted. EXCEPTION: Treads shall be permitted to have a slope not steeper than 1:48....
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504.4 Tread Surface
Stair treads shall comply with 302. Changes in level are not permitted. EXCEPTION: Treads shall be permitted to have a slope not steeper than 1:48. Advisory 504.4 Tread Surface....
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504.4 Tread Surface
Stair treads shall comply with 302. Changes in level are not permitted. EXCEPTION: Treads shall be permitted to have a slope not steeper than 1:48. Advisory 504.4 Tread Surface....
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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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Tread Obstacles [1017.5]
A tread obstacle is anything that interrupts the evenness of the tread surface....
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Tread
Tread—The portion of a trail, outdoor recreation access route, or beach access route where traffic moves (for pedestrian routes, this is the walking surface)....
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11B-504.4 Tread surface
Stair treads shall comply with Section 11B-302. Changes in level are not permitted. Exception: Treads shall be permitted to have a slope not steeper than 1:48....
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11B-504.4 Tread surface
Stair treads shall comply with Section 11B-302. Changes in level are not permitted. Exception: Treads shall be permitted to have a slope not steeper than 1:48....
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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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T405.2 Surfaces
Step tread surfaces shall comply with T302....
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Surface and Clear Tread Width on Beach Access Routes
A beach access route must have a firm, stable surface, and have a clear tread width of 60 inches (1,525 millimeters) minimum....
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Tread Obstacles on Trails
A tread obstacle is anything that interrupts the evenness of the tread surface. On trails, tread obstacles often occur as a result of ruts, roots, and rocks in the tread surface....
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7.4.1 Surface
The trail tread surface, including resting intervals and passing spaces, shall be both firm and stable....
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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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Surfaces of Trails
Trail surfaces must be firm and stable....
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Gripping Surface: ADA Standard Section 505.6
Section 505.6 covers the current ADA Standards for the handrail gripping surface.
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Clear Tread Width
Clear Tread Width. The width of the usable trail tread and adjacent usable surface....
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Clear Tread Width of Trails
Clear tread width is the width of traveled surface between obstacles on the ground and above the ground (figure 129). Provide at least 36 inches (915 millimeters) of clear tread width....
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TREAD
TREAD. The horizontal part of a step....
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7.4.6 Tread Obstacles
Tread obstacles on trails shall not exceed 2 inches (50 mm) in height measured vertically to the highest point. ...
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Openings in Trail Surfaces
Openings are gaps in the surface of a trail. Gaps include slots in a drainage grate and spaces between the planks on a puncheon, bridge, or boardwalk....