Chapter 3: Operable Parts

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operable parts icon

 

This guide explains requirements in the ADA Standards for operable parts.

Operable Parts Covered [§205]

Compliance is required for operable parts located in accessible spaces and along accessible routes. Operable parts include light switches, electrical and communication receptacles, thermostats, alarm pulls, automatic door controls, and other elements used by facility occupants.

Examples of Operable Parts

Examples of operable parts (fire extinguisher cabinet, drinking fountain, fire alarm pull, and electrical outlet.  Notes:  Compliance is required for the operable portions of fixed elements, such as cabinet hardware, but not for inoperable portions or to non-fixed components, such as fire extinguishers; Electrical outlets, alarm pulls, and many other types of receptacles and controls are covered; Provisions for drinking fountains and other elements covered by the standards also apply the criteria for operable parts; Exempt:  floor receptacles and operable parts used only by service or maintenance personnel. 

Examples of Operable Parts in Kitchens

Examples of operable parts in kitchens (faucet controls, outlets, appliance controls, and cabinet handles).   Labels and notes:  Electrical outlets, switches, and faucet controls are required to comply; Appliance controls and handles to accessible storage are also covered as operable parts; Controls on elements outside reach range, such as range hoods, require provision of a second control; If redundant controls (other than light switches) are provided for an element, one control in each space is not required to comply; Exempt:  HVAC diffusers and dedicated electrical or communication receptacles.


Operable Parts [§309]

Requirements apply generally to all types of operable parts covered. They are also referenced by technical sections of the standards covering drinking fountains, faucet and flush controls, ATM and fare machines, appliances, storage, windows, and door and gate hardware, and other elements.

Accessible Features of Operable Parts

Person using wheelchair at fire extinguisher cabinet with labels noting:  operable portions meet usability criteria and are within accessible reach ranges (non-operable portions can be located outside reach range); clear floor space for approach and positioning; and an unobstructed side of the clear floor space adjoins a connecting accessible route.Forward and Side Approaches

At most elements, clear floor space can be positioned for either a forward approach or a side approach. A forward approach is required at some elements, such as drinking fountains and lavatories, for easier access.

Forward Approach and Reach

 

Clear Floor Space [§309.2]

Clear floor space for forward approaches must extend up to or, if knee or toe space is provided, below operable parts. This facilitates access since the forward reach does not extend beyond a wheelchair user’s toes.

 

If clear floor space is obstructed on both sides more than half the minimum required depth, a wider clearance (36” min.) is required for maneuvering and sway. 

Clear floor space 48" min. long and 30" min. wide (36" min wide if obstructed on both side more than 24")
 Person using wheelchair shown in side view reaching over counter with knee and toe space to operable part; depth of knee and toe space below counter must equal or exceed reach depth above counter.

 

 

 

Knee and Toe Space

If the forward reach to operable parts extends over an obstruction, such as a counter, clearances for toes and knees is required below. The knee and toe space must be at least as deep as the reach depth measured from the leading edge of the obstruction.

 

Forward Reach [§308.2]Unobstructed forward reach range 15" min. to 48" max. shown in side view

The range for unobstructed reaches (15” – 48”) applies only to those portions of elements that are operable. Non-operable portions can be located outside the range.

 

 

 

 

 

 

 


Obstructed High Reach

The maximum reach of 48” is reduced to 44” when the depth of reach over an obstruction exceeds 20.” Knee and toe space must extend the full depth of reach.

48" max. reach height above obstruction (counter) if reach depth is 20" max.   44" max. reach height above obstruction (counter) if reach depth is greater than 20" (25" max.) 


Side Approach and Reach

Person using wheelchair positioned for side reach to wall-mounted phoneClear Floor Space [§309.2]

Clear floor space can be oriented for a side approach instead of a forward approach at most operable parts. Nominal centering of the space on operable portions of elements is advisable, but not required (except at washers and dryers).

 

 

 

 

 

 

 

 

 


Clear Floor Space

Additional clearance is required if the space is obstructed on three sides for more than half the depth to allow easier maneuvering into the space.

Clear floor space for side reach 30" min. wide and 48" min. long (60" min. long if obstructed on both side more than 15")

 

Side reach 15" min. to 48" max. shown in elevationSide Reach [§308.3]


The range for side reach, like forward reach is 15” to 48” if unobstructed. The maximum reach depth for this range is 10” measured from the available clear floor space.

 

fuel dispenser iconFuel Dispensers
The operable parts of fuel dispensers located on existing curbs can be up to 54” high.

 

 

 

 

 

 


Obstructed High Reach

The maximum high reach is reduced to 46” when the reach over an obstruction is deeper than 10” (to a maximum of 24”). Obstructions at side reaches are limited to a height of 34”.

Side reach height 48" max. above obstruction 34" max. high if reach depth 10" max.   Side reach 46" max. if reach depth over obstruction 34" max. high if reach depth greater than 10" (24" max.)  

Side Reach Radius

Elements located in corners can be difficult to reach from a side approach.

design compassRecommendation:  Where a side reach is provided, locate elements away from corners in consideration of the typical reach radius.

Person using wheelchair in corner (back to side wall) with reach radius over counter extending to approximately 12" of side wall.   Person using wheelchair in corner (facing side wall) with 24" reach radius extending from center point of wheelchair space (does not extend fully to corner)  


Children's reach ranges: 16" - 44" (9-12 years); 18" - 40" (5-8 years); 20" - 36" (3 & 4 years)

Advisory Reach Range for Children 

The standards include advisory (non-mandatory) reach ranges based on children’s dimensions that can be followed when operable parts are designed for use by children. This guidance provides reach ranges recommended according to three age groups.

 

 

 

 

 

 

Hand (closed fist) pushing down on lever door hardware
Operability with a closed fist is a reliable test of usability, but is not required by the standards.

Operation [§309.4]

Operable parts must be usable with one hand and not require:

  • tight grasping, pinching, or twisting of the wrist, or
  • more than 5 pounds of force (lbf) to operate.

Parts that can be operated without hand or finger dexterity, fine motor movement, or simultaneous actions provide easier access and accommodate a broader range of users.

 

 

 

  

operable parts icon Push Plates, Buttons, and Bars
Push-activated controls not requiring more than 5 lbf are acceptable. Buttons that are raised or flush are easier to use than those that are recessed. (Elevator control buttons cannot be recessed, and input keys at ATM and fare machines must be raised.)

 

door handle Handles, Pulls, and Knobs
Standard U-shaped pulls and lever-shaped handles are acceptable. Stationary knobs with a shape that can be loosely gripped also are acceptable. Knobs that require a full hand grip and turning, including round door knobs and shower controls, do not comply because they require twisting of the wrist.

 

keyhole Latches and Locks
Latches and locks with small parts that must be manipulated can be difficult to use and will not comply if pinching is necessary. However, non-fixed portions of locks and other operable parts, such as keys and access cards, are not required to comply (but those that do not require pinching or turning provide better access). Hardware that does not require simultaneous actions are better, but some types, such as handles with thumb latches are acceptable.

 

light switch Controls and Switches
Dials and other controls that can be turned with the fingers but not the full hand can be used if they do not require twisting of the wrist or pinching. Flip switches and similar controls are acceptable, though push plate types can provide easier access.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Common Questions


Are redundant controls for an element required to comply?

If redundant controls, other than light switches, serve a single element, one control in each space is not required to comply. If a redundant control is located in a different space, however, it must comply. All light switches are required to comply.

What types of electrical or communication receptacles are exempt because they serve a “dedicated use”?

Electrical receptacles serving a dedicated use include those installed for appliances, including refrigerators, ranges, and dishwashers, and wall clocks. Floor electrical receptacles are also exempt. Communication receptacles serving a dedicated use include phone jacks, data ports, network and audio-visual connections. Electrical receptacles provided for portable communication devices such as TTYs are not covered by this exception and must comply.

Do reach range requirements apply to elements or only to operable parts of elements?

Reach range requirements apply to the operable portions of elements, including handles, controls, switches, buttons, control pads and other mechanisms that must be activated or manipulated for use. Non-operable portions of elements do not have to be within accessible reach ranges.

Must operable parts be usable with a closed fist?

Closed-fist operation is a good performance test but is not required by the standards. Many types of operable parts, such as pull handles, satisfy the requirements even though they may not be operable with a closed fist.

Are turn-key locks prohibited by the standards?

Key locks or key cards are not prohibited by the standards which apply only to the fixed portions of operable parts. Similarly, items dispensed by ATMs and fare machines, such as receipts, cash, fare cards, and vending machine products are not covered by the standards.

 

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