ADA Door Clearance Requirements: 32-Inch Minimum, 7 Approach Conditions (2024)

A door that opens to 90 degrees but leaves only 31 inches of clear width still fails the ADA. The minimum is 32 inches — measured between the face of the door and the stop. Get that wrong and the accessible route fails. A failed accessible route blocks the certificate of occupancy.

Here is every number from ADA §404, organized so plan review goes clean.

What are the ADA clear width requirements for doors?

Clear width is the unobstructed opening dimension — required by ADA Standards §404.2.3 wherever a door is part of an accessible route. The standard is 32 inches (815 mm) minimum for most door openings, measured with the door open 90 degrees between the face of the door and the stop. Openings deeper than 24 inches (610 mm) require 36 inches (915 mm) clear. No projections below 34 inches (865 mm) above finish floor are permitted within the required clear width. Projections between 34 inches (865 mm) and 80 inches (2030 mm) must not exceed 4 inches (100 mm). Two exceptions apply in different conditions: latch-side stop projections up to 5/8 inch (16 mm) are permitted in alterations under §404.2.3 Exception 1, and door closers and door stops may be located as low as 78 inches (1980 mm) above finish floor under Exception 2.

What maneuvering clearances do swinging doors require?

Maneuvering clearance is the floor area adjacent to a door that allows a wheelchair user to approach, operate hardware, and pass through — required by ADA Standards §404.2.4 on the push and pull side of every manually operated swinging door on an accessible route. The clearance extends the full width of the doorway plus any required latch-side or hinge-side parallel dimension. The exact dimensions depend on approach direction (front, hinge side, or latch side) and whether the door has a closer or latch. DataDrivenAEC’s analysis of 7 approach conditions from ADA §404.2.4.1 shows that the largest clearance — 60 inches perpendicular with 42 inches parallel — applies to hinge-side pull approaches. That configuration catches teams who assume front-approach geometry applies everywhere. Hospital patient room entry doors are exempt from latch-side clearance beyond the door under §404.2.4 Exception.

What clearances apply to sliding, folding, and doorways without doors?

Sliding doors, folding doors, and doorways less than 36 inches (915 mm) wide without doors use a separate maneuvering clearance table — required by ADA Standards §404.2.4.2 wherever these door types appear on an accessible route. The table covers four approach directions: front, side (no door only), pocket/hinge side, and stop/latch side. Front approach requires 48 inches (1220 mm) perpendicular and 0 inches parallel. Side approach — applicable only to doorways without doors — requires 42 inches (1065 mm) perpendicular and 0 inches parallel. Pocket/hinge-side approach requires 42 inches (1065 mm) perpendicular and 22 inches (560 mm) beyond the pocket/hinge side. Stop/latch-side approach requires 42 inches (1065 mm) perpendicular and 24 inches (610 mm) parallel. Sliding doors in the fully open position must expose operating hardware that is usable from both sides, per §404.2.7.

Why do these dimensions exist? — DataDrivenAEC

Maneuvering clearance dimensions originate in the spatial envelope of a manual wheelchair — defined by the ADA Standards’ basis in human factors research on wheelchair use and documented in the Access Board’s technical bulletins. A standard manual wheelchair is approximately 25 inches wide and requires a turning radius of at least 60 inches to execute a 180-degree turn. Pulling a door open while seated requires the user to back up before the door sweeps the approach zone. The 60-inch perpendicular dimension on pull-side front approaches reflects that retreat distance. The 18-inch latch-side parallel dimension gives the user space to clear the door edge after the door swings. Hinge-side approaches require more parallel clearance because the user must reach across the door width to operate the hardware. Closer-equipped doors increase required clearance because the door resists being held open — adding 6 to 12 inches depending on configuration.

What are the threshold, hardware, and closing-speed requirements?

Threshold height is capped at 1/2 inch (13 mm) for new construction — required by ADA Standards §404.2.5 at every doorway on an accessible route. Existing and altered thresholds may be up to 3/4 inch (19 mm) with a beveled edge on each side at a slope no steeper than 1:2. Hardware must require no tight grasping, pinching, or twisting of the wrist, per §309.4. Hardware height is 34 inches (865 mm) minimum to 48 inches (1220 mm) maximum above finish floor, per §404.2.7. Door closers — when provided — must take at least 5 seconds to travel from 90 degrees open to 12 degrees from latch, per §404.2.8.1. Spring hinges must take at least 1.5 seconds from 70 degrees open to the closed position, per §404.2.8.2. Interior hinged doors and sliding or folding doors must require no more than 5 pounds (22.2 N) of force to open, per §404.2.9.

What are the most common ADA door clearance mistakes?

Common mistakes are specific, measurable failures — each grounded in a section of ADA Standards §404. The most frequent error is measuring clear width at the rough opening rather than between the face of the door and the stop at 90 degrees open. A 34-inch rough opening with a 1-3/4-inch door slab and a 1/2-inch stop leaves 31-3/4 inches clear — below the 32-inch minimum. The second error is using front-approach maneuvering clearances for hinge-side or latch-side conditions, understating the required floor area by as much as 24 inches. The third error is omitting the 12-inch latch-side addition for front push-side approaches with both a closer and a latch — common on office corridor doors. The fourth error is placing a threshold above 1/2 inch at new construction without an exception condition. The fifth error is installing lever hardware at 50 inches above finish floor — above the 48-inch maximum of §404.2.7. These failures appear routinely in plan review comments on accessible route sheets.

Does floor surface condition affect maneuvering clearance compliance?

Floor surface at maneuvering clearances is a compliance condition — required by ADA Standards §404.2.4.4 to comply with §302 (surface firmness and stability) wherever maneuvering clearances are provided. Level changes within the maneuvering clearance zone are not permitted. One exception applies: slopes not steeper than 1:48 are permitted, and threshold changes complying with §404.2.5 are permitted at the door itself. Recessed doors trigger a specific condition under §404.2.4.3: when any obstruction within 18 inches (455 mm) of the latch side projects more than 8 inches (205 mm) beyond the face of the door, forward-approach maneuvering clearances apply — regardless of the actual approach direction. That condition catches recessed entry vestibule doors where wall returns project into what would otherwise be a latch-side approach zone. Coordinate floor finish transitions and mat recesses carefully within the maneuvering clearance boundary.

What are the rules for doors in series?

Doors in series — two hinged or pivoted doors in a vestibule or airlock — are subject to a minimum separation distance required by ADA Standards §404.2.6 wherever the accessible route passes through both doors. The minimum distance between the two doors is 48 inches (1220 mm) plus the width of any door swinging into the space between them. A standard vestibule with two outswinging doors requires at least 48 inches between the face of the first door (in the closed position) and the face of the second door. If either door swings into the vestibule, that door’s width adds to the 48-inch minimum. Both doors in the series must individually meet clear width and maneuvering clearance requirements. Vestibule design that uses only the 48-inch separation without accounting for the maneuvering clearances on each door face is a recurring plan review failure — the two requirements are additive, not interchangeable.

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