According to ADA 406.2, counter slopes of adjoining gutters and/or road surfaces that are adjacent to the curb ramp must not be steeper than 1:20 or 5%. In addition to this, the adjacent surfaces at transition points must be level.
If you are not sure whether or not you are compliant with this or any other point of the Americans with Disabilities act, call an ADA concrete contractor like Protrk Construction for an evaluation.
Being involved in ADA design and construction has given me the opportunity to help a lot of business owners and commercial property owners prevent costly ADA compliant lawsuits.
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