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Note: This document or portion of document references a state or local code that is stricter than the 2010 ADA Standards requires.

11B-406.5.8 Counter slope.

Counter slopes of adjoining gutters and road surfaces immediately adjacent to and within 24 inches (610 mm) of the curb ramp shall not be steeper than 1:20. The adjacent surfaces at transitions at curb ramps to walks, gutters, and streets shall be at the same level.

[2010 ADA Standards] 406.2 Counter Slope. Counter slopes of adjoining gutters and road surfaces immediately adjacent to the curb ramp shall not be steeper than 1:20. The adjacent surfaces at transitions at curb ramps to walks, gutters, and streets shall be at the same level.

In cross section, a curb ramp with a maximum slope of 1:12 adjoins a surface at the bottom that has a maximum counter slope of 1:20.

FIGURE 11B-406.5.COUNTER SLOPE OF SURFACES ADJACENT TO CURB RAMPS

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