Page 511 - Biomedical Engineering and Design Handbook Volume 2, Applications

HOME MODIFICATION DESIGN 489

17.2.15 Range
It is recommended that a cooktop be used because it can be installed at the most appropriate height
for the user, its side or front controls are easily reached by most individuals, and counter installation
can allow open space below the cooktop for easy access.

Height. It is recommended that the cooktop be installed at a height of 30 to 32 in above the floor.
However, to ensure adequate clear space adjacent to the cooktop, make sure that the cooktop is
installed at the same height as the adjacent countertop.

Knee Space. Knee space needs to be available for wheelchair users to allow them to access the
cooktop. Ideally, space should be available under the cooktop to allow easiest access.
Minimum Requirements and Recommended Dimensions. The same as for microwaves.
Reach Ranges. The same as for microwaves.
Clear Space. Adequate clear space beside burners is required. The recommended minimum
amount of clear space is 12 in.

Controls. Controls should never be located at the rear of the unit. Controls should be located on or
near the front of the cooking unit. This ensures that there is no need to reach over or around any burn-
ers. Also, controls located near or at the front are more accessible for persons with visual impair-
ments. There are several different types of controls that can be used with the cooktop. The choice of
control type should be based on the individual’s disability. These control types, along with their
advantages and disadvantages, are provided below.
Lever Type. Advantages include
• They do not require grasping for operation.
• Their shape provides a natural pointer that indicates the control’s position.
Blade Knobs. Control with a large straight blade across the center; use the blade to turn the
knob. Advantages include
• Blade shape is asymmetrical. It extends on one side and forms a pointer that helps indicate the
control’s position.
• The shape acts as a lever. Turning is accomplished with reduced effort.
The disadvantage is that they require grasping for operation.
Electrical Touch Controls. Advantages include
• Single-touch operation.
• Requires little force for operation.
• Requires no gripping or twisting.
• Does not require fine finger dexterity.
• Some manufacturers offer plastic overlay panels with raised tactile openings or labeling to aid the
visually impaired.
The disadvantage is that they may not be accessible to those with visual impairments.
Redundant Cueing/Feedback to the User. Controls should provide redundant cueing or feedback
to the user in order to be accessible to persons with visual and hearing impairments.
Examples of Redundant Cueing/Feedback.
• Click stops. Provide distinct audible sounds and tactile cues.
• High-contrast labeling.
• Raised markers.