ADA Elevator Requirements: Scoping, Car Dimensions, Doors, and Controls

The 2010 ADA Standards do not use one universal “elevator required” trigger. Start with §206.2.3: at least one accessible route must generally connect each story and mezzanine in a multistory building or facility, subject to seven stated exceptions. Where elevators are provided for passengers, §206.6 generally requires each elevator to comply with §407. An accessible route can sometimes use a ramp, a permitted limited-use/limited-application elevator, or a permitted platform lift instead of a conventional passenger elevator.

For a conventional accessible passenger elevator, verify the landing features in §407.2, doors in §407.3, car dimensions and features in §407.4, the referenced ASME A17.1 requirements, and separately applicable building-code provisions. This guide describes the federal 2010 ADA Standards; state and local accessibility or building codes can add requirements.

When is an accessible route required between stories?

Section 206.2.3 generally requires an accessible route to connect each story and mezzanine. The relevant exception must be identified before concluding that vertical access is not required.

Exception 1 applies to certain private buildings or facilities that are less than three stories or have less than 3,000 square feet per story. It does not apply to a shopping center or mall, a professional office of a health care provider, specified public-transportation facilities, airport passenger terminals, or another facility type determined by the Attorney General.

Exception 2 is different: in a two-story public building or facility, one story with an occupant load of five or fewer persons that contains no public-use space need not be connected to the other story. It is incorrect to reverse this exception into a rule that more than five occupants automatically require an elevator in every two-story building.

The remaining exceptions address specified detention and correctional facilities, certain residential facilities, internal stories of some transient-lodging guest rooms, air-traffic-control towers, and qualified historic alterations. Read all applicable scoping provisions, alteration rules, and advisories before selecting the vertical-access method.

Does an accessible route always have to be a conventional elevator?

No. Section 206.6 says passenger elevators must comply with §407, but its exceptions allow §408 limited-use/limited-application elevators in a building or facility permitted to use a §206.2.3 exception or a §206.7 platform lift. Section 206.7 permits platform lifts only in listed situations. A ramp complying with §405 can also form part of an accessible route where the project geometry allows it.

The scoping decision and the technical elevator check are therefore separate:

1. determine whether an accessible route must connect the levels;
2. determine which vertical-access method is permitted; and
3. if a passenger elevator is used, verify all applicable §407 requirements.

ADA Table 407.4.1 elevator-car dimensions

Table 407.4.1 contains four rows, not three. Each dimension is a separate clear measurement.

¹ The table permits a minus-5/8-inch tolerance for the 36-inch door clear width in these rows.
² Another car configuration that provides a §304 turning space with the door closed is permitted.

The centered row requires 42 inches of door clear width; “36-inch minimum” is not a correct universal summary for all four rows. The table’s dimensions must be measured in the directions identified by the table rather than reduced to one nominal width-by-depth pair.

Section 407.4.1 also contains an exception for an existing elevator-car configuration that provides at least 16 square feet of clear floor area, at least 54 inches of inside clear depth, and at least 36 inches of clear width. That exception is not an automatic approval of the rest of the existing elevator.

What landing and door features must be checked?

Section 407.2 covers elevator landings, including call controls, hall signals, tactile hoistway signs, and destination-oriented systems. Call buttons must be at least 3/4 inch in their smallest dimension under §407.2.1.2. The raised floor designation on both hoistway jambs must be 2 inches high minimum and accompanied by braille under §407.2.3.1.

Section 407.3 requires doors, gates, and other hoistway-opening protections to comply with §407.3 and with the referenced ASME A17.1 provisions. Elevator doors and gates must generally be horizontal sliding and automatic; §407.3.1 contains a bounded exception for existing elevators with manual-swinging hoistway doors where the car doors comply with §407.3.3.

The reopening device under §407.3.3 must meet the section’s automatic-reopening and obstruction-detection requirements. Section 407.3.5 separately requires elevator doors to remain fully open in response to a car call for at least three seconds. That three-second rule is not the complete door-timing calculation; §407.3.4 contains the door and signal timing framework and exceptions.

What car features and controls must be checked?

After the Table 407.4.1 dimensions, §407.4 continues with separate requirements for:

• floor surfaces;
• platform-to-hoistway clearance;
• automatic leveling;
• illumination;
• control location, button type and arrangement, keypads, and emergency controls;
• tactile and visible control identification;
• audible and visible position indicators; and
• emergency communication.

For example, §407.4.3 limits the car-platform-sill-to-hoistway-landing clearance to 1 1/4 inches, and §407.4.4 requires automatic leveling within 1/2 inch under the stated loading range. Section 407.4.6.1 routes control locations through the reach ranges in §308 and contains exceptions; it is not accurate to summarize all car controls as one universal 48-inch height.

How does the IBC interact with the ADA elevator rules?

The ADA accessibility route and elevator provisions do not replace the adopted building code. The 2024 IBC uses Chapter 11 for accessibility scoping and Chapter 30 for elevator and conveying-system construction, fire-service access, hoistway, and related requirements. The project must satisfy each applicable authority.

One commonly conflated rule is IBC §3002.4. Where elevators are already provided in a building four or more stories above or four or more stories below grade plane, at least one elevator must provide fire-department emergency access to all floors and accommodate a horizontal 24-inch-by-84-inch ambulance stretcher with the specified corner radius and identification. Section 3002.4 does not itself require every four-story building to install an elevator.

Use the adopted IBC edition, state or local accessibility code, elevator safety code, and authority having jurisdiction to check the full project. Fire-service access elevators, occupant-evacuation elevators, accessible means of egress, standby power, and emergency operation are separate analyses.

Methodology and limitations

This guide covers the federal 2010 ADA Standards baseline and a narrow 2024 IBC cross-reference. It does not decide whether the ADA applies to a particular entity or alteration, determine an equivalent-facilitation claim, apply state or local accessibility law, or complete an elevator-system design.

The ADA Elevator Car Dimension Check compares the four clear dimensions in one selected Table 407.4.1 row. It does not decide whether an elevator is required or test doors, controls, signals, timing, communication, existing-building exceptions, or IBC compliance.

Primary sources

• DOJ 2010 ADA Standards for Accessible Design, especially §§206.2.3, 206.6, 206.7, and 407.
• DOJ Guidance on the 2010 ADA Standards, including the elevator and destination-oriented-elevator guidance.
• 2024 IBC Chapter 30 — Elevators and Conveying Systems, especially §3002.4.

Correction history

1 September 2026 — Revision 1. Corrected the reversed five-person public-building exception, restored the fourth Table 407.4.1 configuration and its tolerances, separated accessible-route scoping from elevator technical requirements, bounded the existing-elevator and door exceptions, removed unsupported causal and plan-review claims, and clarified that IBC §3002.4 applies where elevators are provided rather than creating a universal four-story elevator trigger.

Frequently asked questions

Does every two-story building need an elevator when one floor has more than five occupants?

No. The five-person language belongs to §206.2.3 Exception 2 for one story of a two-story public building or facility where that story has no public-use space. Apply the full §206.2.3 scoping sequence rather than reversing this exception into a universal trigger.

Is a 36-inch clear elevator door always sufficient under Table 407.4.1?

No. The centered-door row requires 42 inches. The other three rows list 36 inches with the table’s stated minus-5/8-inch tolerance.

Does a dimension-check result establish ADA compliance?

No. Table 407.4.1 is one part of §407. Landing controls, signals, doors, timing, leveling, car controls, indicators, emergency communication, scoping, alterations, and other applicable laws remain separate checks.

Does IBC §3002.4 require an elevator in every four-story building?

No. Its stretcher rule applies where elevators are provided in a building four or more stories above or below grade plane.