A clear floor or ground space complying with 305 shall be positioned for a forward approach to the counter.
Ada minimum counter depth.
A counter that is adjustable to provide a kitchen work surface at variable heights 29 inches 735 mm minimum and 36 inches 915 mm maximum shall be permitted.
In this instance the 27 height is effectively an absolute dimension because it is the minimum required for knee clearance and the maximum specified for cane detection.
306 3 3 minimum required depth.
A portion of the counter surface that is 30 inches 760 mm long minimum and 36 inches 915 mm high maximum shall be provided.
There shall be no sharp or abrasive surfaces under the work surface counters.
A wheelchair accessible unit located 27 absolute above the ground or floor is cane detectable and can be used to enclose one side of high units for standing access.
This depth means most people easily reach the back of the counter.
Where knee clearance is required under an element as part of a clear floor space the knee clearance shall be 11 inches 280 mm deep minimum at 9 inches 230 mm above the finish floor or ground and 8 inches 205 mm deep minimum at 27 inches 685 mm above the finish floor or ground.
A linear foot is 12 by 25 inches in this case since the standard counter depth for kitchens is 25 inches.
Or for answers to specific questions call the toll free ada information line at 800 514 0301 voice or 800 514 0383 tty.
An accessible checkout aisle should provide a minimum of a 36 inch wide access aisle and it should be identified by a sign with the international symbol of accessibility mounted over the aisle.
The ada also requires minimum unobstructed areas in front of different counter types.
Bathrooms tend to have smaller and narrower counters especially since people will lean over them to inspect their face regularly.
They measure between 19 5 and 22 5.
Knee and toe space complying with 306 shall be provided under the counter.
The ada home page provides access to americans with disabilities.
Ada standards for accessible design can be downloaded from www ada.