For exemptions see the 2010 ada standards for accessible design document.
Ada requirements for floor mats.
This guide explains requirements in the ada standards for floor and ground surfaces.
Commercial mats under these guidelines must feature a slip resistant surface and certain charge in levels pile heights and static coefficient of friction requirements.
Have a firm backing or no backing at all.
4 5 ground and floor surfaces.
Specifications for floor and ground surfaces address surface characteristics carpeting openings and changes in level.
Maximum thickness equal or less than 1 2.
A summary of the accessibility guidelines includes.
On any ground surface carpet must be attached securely to the floor.
4 5 1 general ground and floor surfaces along accessible routes and in accessible rooms and spaces including floors walks ramps stairs and curb ramps shall be stable firm slip resistant and shall comply with 4 5.
If the thickness is between 1 4 and 1 2 the exposed edges need to be beveled.
Also elongated openings must be placed so that the long dimension is perpendicular to the dominant direction of travel.
Firmness stability and slip resistance 302 1 carpet 302 2 openings 302 3 changes in level 303 common questions.