Entrances

The clear opening width of the accessible entrance door should be at least 32 inches between the face of the door and the stop, when the door is open 90 degrees.

If there is a front approach to the pull side of the door, there should be at least 18 inches of maneuvering clearance beyond the latch side plus at least 60 inches clear depth. 
See 404.2 in the ADA standards for all possible door way configurations.

The door threshold edge should be no more than 1/4 inch high. Or, The door threshold should be no more than ¾ inch high if slope is beveled no steeper than 1:2.

 Note: The first 1/4 inch of the threshold may be vertical; the rest must be beveled.