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ABA Accessibility Standard for GSA Facilities Pocket Guide

1016.7 Slopes.

The slopes of outdoor recreation access routes shall comply with 1016.7.

1016.7.1 Maximum Running Slope and Segment Length.

The running slope of any segment of an outdoor recreation access route shall not be steeper than 1:10 (10%). Where the running slope of a segment of an outdoor recreation access route is steeper than 1:20 (5%), the maximum length of the segment shall be in accordance with Table 1016.7.1, and a resting interval complying with 1016.8 shall be provided at the top and bottom of each segment.

Table 1016.7.1
Maximum Running Slope and Segment Length

Running Slope of Outdoor Recreation Access Route Segment

 

Maximum Length of Segment

Steeper than

But not Steeper than

 

1:20 (5%)

1:12 (8.33%)

50 feet (15 m)

1:12 (8.33%)

1:10 (10%)

30 feet (9 m)

Advisory 1016.7.1 Maximum Running Slope and Segment Length. Gradual running slopes are more useable by individuals with disabilities.  Where the terrain results in steeper running slopes, resting intervals are required more frequently. Where running slopes are less severe, resting intervals are permitted to be further apart. 

1016.7.2 Cross Slope.

The cross slope shall not be steeper than 1:48.

EXCEPTION: Where the surface is other than concrete, asphalt, or boards, cross slopes not steeper than 1:20 shall be permitted when necessary for drainage.

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