Cross Slope and Surfaces [4.8.6]
The cross slope (2% maximum) must be minimized because it makes wheelchair travel difficult by distributing more weight and required force to one side and causing front casters to veer. Ramp surfaces must comply with requirements for ground and floor surfaces and be "stable, firm, and slip-resistant." A specific level of slip-resistance is not mandated. It is difficult to categorize various materials as acceptable or unacceptable since surface treatments (texturing and applied coatings) can make a considerable difference. Recommendation: It is important that consideration be given to the conditions likely to be found on the surface, such as providing a higher level of slip-resistance on surfaces exposed to moisture.
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