For all non egress exterior doors the 2003 code update allows a 7 3 4 in.
Ada exterior door landing.
Maximum threshold height at building entry is 3 4 inch 19 mm for exterior sliding doors and 1 2 inch 13 mm for other types of doors without modification.
A exterior hinged doors.
Step down on the interior and up to two steps down to the landing on the exterior regardless of which way the door swings it can only swing over one step.
The photo upper right illustrates another way to modify an entrance to make it accessible.
This allowance provides some design flexibility.
A space 60 inches 1525 mm minimum by 60 inches 1525 mm minimum.
Or an intersection of two walking surfaces providing a t shaped space complying with 304 3 2 where the base and arms of the t shaped.
An accessible route with a clear width less than 60 inches 1525 mm shall provide passing spaces at intervals of 200 feet 61 m maximum passing spaces shall be either.
Landing requirements for all other exterior doors.
2 the landing length shall be a minimum of 60 in 1525 mm clear.
Minimum number at least 60 of public entrances must be accessible in new construction in addition to entrances directly serving tenancies parking facilities pedestrian tunnels and elevated walkways.
Ada ramp handrails when a handicap ramp has a rise greater than six inches or a horizontal projection greater than 72 inches the ramp must have handrails on both sides.
Where the door opens into the stairway of a smokeproof enclosure the landing need not have a length of 5 feet.
Any ramp system that is intended for public use must comply with the americans with disabilities act ada.
5 lbf 22 2n c sliding or folding doors.
1 fire doors shall have the minimum opening force allowable by the appropriate administrative authority.
B interior hinged doors.
The area adjacent to the landing is graded flush with the landing so no drop off exists between the landing and the grass area eliminating the need for railings.
4 13 11 door opening force.
A level landing area is provided in front of the entry door so a person can pull the door open.
3 if ramps change direction at landings the minimum landing size shall be 60 in by 60 in 1525 mm by 1525 mm.
Where a door opens over a landing the landing shall be at least as wide as the door and at least 5 feet long.
4 if a doorway is located at a landing then the area in front of the doorway shall comply with 4 13 6.
This guide explains scoping and technical requirements for accessible entrances doors and gates in the ada standards.