The Americans with Disabilities Act (ADA) establishes specific requirements for doors, doorways, and door hardware in commercial buildings to ensure accessible passage for individuals with disabilities. These requirements are codified in the 2010 ADA Standards for Accessible Design, primarily under Section 404. They govern clear width, opening force, closing speed, hardware operability, threshold height, maneuvering clearance, and surface conditions. Every commercial door assembly in an accessible route must comply with these standards.
CDF Distributors manufactures and ships complete commercial door assemblies from its Nashville, Tennessee headquarters. You can configure ADA-compliant assemblies online using CDF’s ProBuilder tool at cdfdistributors.com. For assistance specifying an ADA-compliant door and frame assembly, call (855) 769-9895 or email sales@cdfdoors.com.
ADA Door Requirements Overview
Section 404 of the 2010 ADA Standards for Accessible Design addresses doors, doorways, and gates along accessible routes. The requirements below apply to swinging doors in commercial buildings, including offices, healthcare facilities, educational institutions, retail spaces, and government buildings. Each subsection addresses a specific physical characteristic of the door assembly that affects accessibility.
The following table summarizes all major ADA door requirements by code section. Detailed explanations of each requirement follow.
ADA Section | Requirement | Standard |
§404.2.2 | Double-Leaf Doors | One active leaf must meet clear width and maneuvering clearance independently |
§404.2.4 | Maneuvering Clearance | Required on both sides of the door (unless door/gate is used in one direction only) |
§404.2.5 | Thresholds | 1/2” maximum height; beveled if above 1/4” |
§404.2.7 | Hardware | Operable with one hand, no tight grasping/pinching/twisting; mounted 34”–48” AFF |
§404.2.8 | Closing Speed | Closers: 5 seconds minimum from 90° to 12°; spring hinges: 1.5 seconds minimum from 70° to 0° |
§404.2.9 | Opening Force | 5 lbf maximum (excluding exterior hinged doors and fire doors) |
§404.2.10 | Smooth Surface | Required on the push side, bottom 10” minimum AFF, full width of door |
§404.2.11 | Vision/Side Lights | Accessible viewing height 43” maximum (unless lowest part is above 66”) |
Clear Width Requirements
ADA Section 404.2.3 requires that door openings provide a clear width of 32 inches minimum. The maximum clear opening width is 48 inches. Clear width is measured between the face of the door and the stop on the latch side when the door is open 90 degrees. This measurement does not include the door thickness itself or any projecting hardware on the door face.
Minimum Clear Width | 32 inches |
Maximum Clear Width | 48 inches |
Measurement Point | Between door face and stop at latch side, door open 90° |
Excludes | Door thickness, projecting hardware |
For standard commercial applications, a 3’0” (36”) door in a standard hollow metal frame typically provides approximately 34” of clear width when open, which satisfies the 32” minimum requirement.
Double-Leaf Doors (§404.2.2)
When a doorway uses double-leaf (pair) doors, at least one active leaf must independently meet the clear width requirement and the maneuvering clearance requirement. All other door requirements under Section 404 apply to both leaves. This means both leaves must comply with hardware, threshold, closing speed, opening force, and smooth surface requirements, but only one leaf needs to provide the minimum 32-inch clear width on its own.
ADA Section | §404.2.2 |
Applies To | Double-leaf (pair) door configurations |
Clear Width | One active leaf must independently provide 32” minimum clear width |
Maneuvering Clearance | One active leaf must independently meet maneuvering clearance |
Other Requirements | Hardware, thresholds, closing speed, opening force, and smooth surface apply to both leaves |
Maneuvering Clearance (§404.2.4)
Maneuvering clearance is the floor space required on both sides of a door to allow a person using a wheelchair or mobility device to approach, open, pass through, and close the door. The required clearance dimensions vary based on the type of door (swinging, sliding, folding), the direction of approach (front, hinge side, latch side), and whether the door has a closer. Maneuvering clearance is required on both sides of the door unless the door or gate is used in one direction only.
ADA Section | §404.2.4 |
Requirement | Floor clearance on both sides of the door |
Exception | Not required on both sides if door/gate is used in one direction only |
Variables | Door type, approach direction, presence of closer |
Surface | Maneuvering clearance floor must be level (max 1:48 slope) |
The specific maneuvering clearance dimensions are defined in Tables 404.2.4.1 (swinging doors) and 404.2.4.2 (doorways without doors, sliding doors, and folding doors) of the ADA Standards. Architects and specifiers should consult these tables when designing accessible doorways.
Thresholds (§404.2.5)
Thresholds at accessible doorways must not exceed 1/2 inch in height. Thresholds that are higher than 1/4 inch must be beveled with a slope no steeper than 1:2. This requirement prevents tripping hazards and ensures smooth passage for wheelchairs, walkers, and other mobility devices.
ADA Section | §404.2.5 |
Maximum Threshold Height | 1/2” |
Bevel Required | If threshold exceeds 1/4” in height |
Maximum Bevel Slope | 1:2 |
Purpose | Prevent tripping hazards; allow smooth wheelchair passage |
Door Hardware (§404.2.7)
All operable parts of door hardware on accessible routes must comply with Section 309.4 of the ADA Standards. Hardware must be operable with one hand and must not require tight grasping, pinching, or twisting of the wrist to operate. Lever handles, push-pull bars, and panic hardware satisfy this requirement. Round door knobs do not comply because they require a twisting grip. Hardware must be mounted between 34 inches and 48 inches above the finished floor (AFF).
ADA Section | §404.2.7 (references §309.4) |
Operation | Operable with one hand; no tight grasping, pinching, or twisting |
Compliant Hardware Types | Lever handles, push-pull bars, panic/exit devices |
Non-Compliant Hardware | Round door knobs (require twisting) |
Mounting Height | 34” to 48” above finished floor (AFF) |
Operable Portions | 34” to 48” AFF |
Closing Speed (§404.2.8)
Door closers must be adjusted so that the door takes a minimum of 5 seconds to move from the 90-degree open position to 12 degrees from the latch. This controlled closing speed provides sufficient time for a person using a mobility device to pass through the doorway before the door closes. Spring hinges have a separate requirement: the door must take a minimum of 1.5 seconds to move from 70 degrees open to the closed position.
ADA Section | §404.2.8 |
Door Closers | 5 seconds minimum from 90° to 12° |
Spring Hinges | 1.5 seconds minimum from 70° to 0° (closed) |
Purpose | Allow sufficient passage time for persons using mobility devices |
Closing speed is adjusted on the door closer mechanism itself. Most commercial door closers have separate adjustment valves for closing speed (the main sweep), latching speed (the final few degrees), and backcheck (resistance when opening fully). The ADA closing speed requirement applies to the main sweep from 90 degrees to 12 degrees.
Opening Force (§404.2.9)
The force required to open an interior hinged door on an accessible route must not exceed 5 pounds-force (lbf). This limit applies to the force needed to push or pull the door open from a closed position, not including the force required to operate the latch hardware. Two categories of doors are excluded from the 5 lbf maximum: exterior hinged doors and fire doors. Fire doors are permitted to have the minimum opening force allowed by the applicable fire code, which is typically higher than 5 lbf.
ADA Section | §404.2.9 |
Maximum Opening Force | 5 lbf (interior hinged doors) |
Excluded: Exterior Hinged Doors | No ADA maximum specified (governed by building code) |
Excluded: Fire Doors | Minimum force allowed by applicable fire code |
Measurement | Force to open door from closed position; excludes latch operation force |
Opening force is affected by the door closer adjustment, door weight, hinge condition, and weatherstripping. For fire-rated assemblies, the closer must be adjusted to both meet fire code latching requirements and keep opening force as low as possible. CDF ships fire-rated assemblies with closers pre-selected for the rated assembly; closer adjustment is performed during installation.
Smooth Surface (§404.2.10)
The push side of swinging doors on accessible routes must have a smooth surface within the bottom 10 inches measured from the finished floor. This smooth area must extend the full width of the door. The smooth surface requirement prevents wheelchair footrests and other mobility device components from catching on raised panels, kick plates with exposed edges, or other projections at the bottom of the door.
ADA Section | §404.2.10 |
Location | Push side of swinging doors |
Height | Bottom 10” minimum above finished floor (AFF) |
Width | Full width of door |
Purpose | Prevent wheelchair footrests from catching on door surface |
Standard flush hollow metal doors and flush wood doors with applied kick plates meet this requirement. Stile-and-rail doors or doors with raised panels in the bottom 10 inches may not comply.
Vision Lights and Side Lights (§404.2.11)
When vision panels (glass lites in the door) or side lights (glazing adjacent to the door) are provided, the bottom of at least one vision panel must be no higher than 43 inches above the finished floor. This allows a person seated in a wheelchair to see through the door before opening it. An exception applies if the vision panel is not intended for viewing purposes, in which case the lowest part of the glazing must be above 66 inches AFF.
ADA Section | §404.2.11 |
Maximum Viewing Height | Bottom of vision panel at 43” AFF maximum |
Exception | If not intended for viewing: lowest part must be above 66” AFF |
Applies To | Vision panels in doors and side lights adjacent to doors |
Purpose | Allow seated persons to see through the door before opening |
ADA Compliance in Commercial Door Assemblies
ADA compliance is not the responsibility of a single component. It requires the entire door assembly — door, frame, hardware, closer, threshold, and glazing — to work together within the standards. The following table maps each ADA requirement to the assembly components that affect compliance.
ADA Requirement | Affected Components | Compliance Note |
Clear Width (§404.2.3) | Door width, frame profile, hardware projection | Standard 3’0” door in standard frame provides approx. 34” clear |
Closing Speed (§404.2.8) | Door closer | Adjusted on-site during installation |
Opening Force (§404.2.9) | Door closer, door weight, hinges | 5 lbf max for interior; fire doors exempt |
Hardware (§404.2.7) | Locksets, levers, panic devices | Lever or push-pull required; no round knobs |
Smooth Surface (§404.2.10) | Door face, kick plate | Flush doors comply; check raised-panel doors |
Thresholds (§404.2.5) | Threshold, floor transition | 1/2” max; bevel if over 1/4” |
Vision Lights (§404.2.11) | Door lite kit, side light frame | Bottom of lite at 43” max AFF |
Maneuvering Clearance (§404.2.4) | Floor space, wall layout | Architectural; not assembly-specific |
Fire-Rated Assemblies and ADA Compliance
Fire-rated door assemblies must comply with both fire code requirements and ADA accessibility standards. The primary area of conflict is opening force: fire doors are permitted to exceed the 5 lbf maximum if the applicable fire code requires a higher minimum closing force. All other ADA requirements — clear width, hardware operability, closing speed, threshold height, smooth surface, and vision light placement — apply to fire-rated assemblies without exception.
CDF fabricates fire-rated assemblies in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute configurations. Fire labels are riveted to every fire-rated door, frame, and hardware component before shipping. The Authority Having Jurisdiction (AHJ) verifies label presence and assembly compliance during inspection.
Fire Rating Levels | 20, 45, 60, 90, and 180 minutes |
Opening Force Exception | Fire doors may exceed 5 lbf per applicable fire code |
All Other ADA Requirements | Apply without exception |
Label Verification | AHJ inspects labels on door, frame, and hardware |
Configure Your Assembly
CDF’s ProBuilder tool allows architects, contractors, and facility managers to configure complete door assemblies online with ADA-compliant hardware options. During configuration, ProBuilder structures door, frame, and hardware selections as a complete assembly and displays compatible options. Lever hardware, accessible closers, and compliant threshold options are available within the ProBuilder interface.
For assistance specifying an ADA-compliant commercial door assembly, call (855) 769-9895 or email sales@cdfdoors.com. CDF’s sales team is available Monday through Friday, 7:30 AM to 4:30 PM CT.
Frequently Asked Questions
What is the minimum clear width for an ADA-compliant door?
The ADA requires a minimum clear width of 32 inches for door openings on accessible routes. Clear width is measured between the face of the door and the stop on the latch side when the door is open 90 degrees. A standard 3’0” (36”) commercial door in a standard hollow metal frame typically provides approximately 34 inches of clear width, satisfying this requirement.
What is the maximum opening force for an ADA door?
Interior hinged doors on accessible routes must not require more than 5 pounds-force (lbf) to open. Exterior hinged doors and fire doors are excluded from this limit. Fire doors may require the minimum opening force allowed by the applicable fire code.
Are round door knobs ADA compliant?
No. Round door knobs require a twisting grip to operate, which does not comply with ADA Section 309.4. ADA-compliant hardware must be operable with one hand and must not require tight grasping, pinching, or twisting. Lever handles, push-pull bars, and panic/exit devices are compliant alternatives.
What are the ADA requirements for door closers?
Door closers must be adjusted so that the door takes a minimum of 5 seconds to move from 90 degrees open to 12 degrees from the latch (§404.2.8). Spring hinges must allow a minimum of 1.5 seconds from 70 degrees to the closed position. These speeds are set during installation by adjusting the closer’s sweep and latch speed valves.
What is the ADA threshold height limit?
Thresholds at accessible doorways must not exceed 1/2 inch in height (§404.2.5). Any threshold higher than 1/4 inch must be beveled with a slope no steeper than 1:2. This applies to all door types on accessible routes.
Do double doors need to meet ADA width requirements on both leaves?
No. For double-leaf (pair) door configurations, only one active leaf is required to independently provide the minimum 32-inch clear width and meet maneuvering clearance requirements (§404.2.2). However, all other ADA door requirements — including hardware, thresholds, closing speed, and smooth surface — apply to both leaves.
What is the smooth surface requirement for ADA doors?
The push side of swinging doors must have a smooth surface within the bottom 10 inches above the finished floor, extending the full width of the door (§404.2.10). This prevents wheelchair footrests from catching on the door surface. Standard flush hollow metal doors and flush wood doors with kick plates comply. Raised-panel doors may not comply in the bottom 10-inch zone.
What is the ADA vision lite height requirement?
When vision panels are provided in a door or adjacent side lights, the bottom of at least one panel must be no higher than 43 inches above the finished floor (§404.2.11). This allows a person in a wheelchair to see through the door. An exception applies if the glazing is not intended for viewing, in which case the lowest part must be above 66 inches AFF.
About This Guide
This reference guide summarizes ADA door and hardware requirements from the 2010 ADA Standards for Accessible Design, Section 404. It is published by CDF Distributors as a resource for architects, contractors, facility managers, and building code officials. The content reflects CDF’s experience manufacturing and shipping ADA-compliant commercial door assemblies to projects nationwide from its Nashville, Tennessee headquarters.
This guide is intended for informational purposes and does not constitute legal or code compliance advice. Always verify requirements with the full ADA Standards, applicable local building codes, and the Authority Having Jurisdiction (AHJ). For questions about ADA-compliant door assemblies, contact CDF at (855) 769-9895 or sales@cdfdoors.com. Configure your assembly online at cdfdistributors.com using ProBuilder.
