For covered routes, the 2010 ADA Standards call for at least 32 inches of clear doorway width and generally limit threshold height to 1/2 inch, with a beveled exception for some existing or altered thresholds up to 3/4 inch. Check doorway, ramp fit and local rules together; the ADA is not a universal residential code.
Measure the threshold, usable door opening and approach before choosing a ramp. A product that bridges the rise can still leave too little room for the door to swing or a wheelchair to line up and turn.
Measure the opening and transition
Record the threshold height at its highest point, clear opening with the door open, door swing and available floor space on both sides. Measure the ramp’s usable width and check its height range, surface, attachment, edge treatment and rated load. For a powered chair or scooter, include device width, turning space and any footplate or caster that projects beyond the seat.
| Ramp style and use | Verify before installation |
|---|---|
| Portable wedge for a small rise and removable one-piece transition | Height range, width, load limit, grip, carrying and door clearance. |
| Modular threshold system for sections or adjustable height | Connections, edges, landing area, weather exposure and fasteners. |
| Fixed transition for a durable installed route | Surface, drainage, door operation, permits and qualified installation. |
Understand the standards in context
The 2010 ADA Standards generally call for 32 inches minimum clear width at doorways and a maximum 1/2-inch threshold. Changes above 1/4 inch must be beveled; the standards include an exception up to 3/4 inch for certain existing or altered thresholds with beveled edges. See the U.S. Access Board’s doorway and threshold requirements.
Those standards apply to covered accessible facilities. They are not a universal code for every private home, and other building codes or project requirements can apply. Do not assume that adding a portable ramp resolves all doorway, landing, maneuvering or door-force requirements. For a longer ramp run, compare the slope, landing and handrail guide and verify local rules.
Before purchase, check whether the ramp stays fixed under the expected load, allows the door to open, leaves the route clear and can be cleaned in the intended setting. If the setup changes transfers or controls, have a mobility professional review it. For an alternative between floors, compare straight and curved stair lifts. Browse home access.
Common questions
How do I choose a threshold ramp height?
Measure the threshold at its highest point and compare the ramp's stated height range and transition at both ends. Follow the ramp maker's slope and installation instructions for the intended device and use.
How much clear width does an accessible doorway need?
The 2010 ADA Standards generally require at least 32 inches of clear doorway width, measured with a swinging door open 90 degrees. Confirm which standard applies to the facility and check the full opening after the ramp is installed.
What is the ADA limit for a doorway threshold?
For covered accessible routes, the 2010 ADA Standards generally limit thresholds to 1/2 inch, with beveling required above 1/4 inch; an exception allows up to 3/4 inch for certain existing or altered thresholds when beveled.
Does an ADA threshold ramp make a private home compliant?
Not by itself. ADA Standards do not serve as a universal residential code; local building rules and the full doorway and approach conditions still matter.