Tread obstacles on trails shall not exceed 2 inches (50 mm) in height measured vertically to the highest point. ...
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7.4.6 Tread Obstacles
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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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Tread Obstacles [1017.5]
A tread obstacle is anything that interrupts the evenness of the tread surface....
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Tread Obstacles on Beach Access Routes
Tread obstacles on a beach access route must not be more than 1 inch (25 millimeters) high....
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Tread Surface: ADA Standard Section 504.4
Section 504.4 covers the current ADA Standards for the tread surfaces on stairways.
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2.7 Tread Obstacles
Where tread obstacles exist on the surface of an ORAR, they shall not exceed 1 inch (25 mm) in height....
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1017.5 Tread Obstacles
Natural features such as tree roots and rocks within the trail tread also can be obstacles....
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1017.5 Tread Obstacles
Advisory 1017. 5 Tread Obstacles. The vertical alignment of joints in concrete, asphalt, or board surfaces can be tread obstacles. ...
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1017.5 Tread Obstacles
Advisory 1017.5 Tread Obstacles. The vertical alignment of joints in concrete, asphalt, or board surfaces can be tread obstacles....
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1018.5 Obstacles
This section contains technical requirements for obstacles on beach access routes and resting intervals....
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Obstacles [1018.5]
Changes in the vertical alignment of boards or the connection points for removable sections of beach access routes can be obstacles to beach access....
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Tread Obstacles on Outdoor Recreation Access Routes
A tread obstacle is anything that interrupts the evenness of the tread surface....
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6.9 Tread Obstacles
Obstacles on beach access routes and their related resting intervals shall not exceed 1 inch (25 mm) in height measured vertically to the highest point....
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Obstacles [1016.5]
Obstacles are anything that interrupts the evenness of the surface of an ORAR....
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1016.5 Obstacles
Advisory 1016.5 Obstacles. The vertical alignment of joints in concrete, asphalt, or board surfaces can be obstacles. ...
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1016.5 Obstacles
Advisory 1016.5 Obstacles. The vertical alignment of joints in concrete, asphalt, or board surfaces can be obstacles....
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1016.5 Obstacles
Natural features such as tree roots and rocks on outdoor recreation access routes also can be obstacles....
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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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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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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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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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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
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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TREAD
TREAD. The horizontal part of a step....