CBD Accessibility & Universal Design Flashcards

What minimum turning radius must a bathroom provide to allow a full 180-degree wheelchair turn per ADA guidelines?

Answer: 60-inch diameter clear floor space (T-turn or full circle)

ADA requires a 60-inch diameter clear floor space (or a T-shaped space) to allow a wheelchair to complete a full 180-degree turn.

In aging-in-place design, which water temperature control feature is most important for protecting users with reduced sensation?

Answer: Thermostatic mixing valves preset to a maximum of 120°F (49°C)

Thermostatic mixing valves with a pre-set temperature cap (typically 120°F max) prevent scalding for users who may have limited heat sensitivity.

Which handheld showerhead specification is most important for both accessibility and aging-in-place design?

Answer: A hose length of at least 59 inches and adjustable-height slide bar

A 59-inch minimum hose length with a slide bar allows the showerhead to be used seated or standing and positioned at any height needed.

What contrast level is recommended between grab bars and wall surfaces in accessible bathroom design to aid users with low vision?

Answer: High visual contrast (e.g., dark bar on light wall or vice versa) with at least 70% luminance contrast

High luminance contrast (70% or greater) between grab bars and the wall background helps people with low vision easily locate and use the bars.

Which of the following best describes the concept of 'visitability' as applied to bathroom design?

Answer: Incorporating a minimum set of accessibility features (wide doors, a no-step entry, and an accessible powder room) so the home can be visited by people with disabilities

Visitability is a movement to ensure that all new homes include basic accessibility features allowing anyone — including wheelchair users — to at least visit the home.

When designing a curbless shower for universal accessibility, what minimum interior dimension is recommended for a single-user roll-in shower per ADA standards?

Answer: 36 inches × 60 inches

ADA specifies a minimum roll-in shower size of 36 inches wide by 60 inches deep (clear interior) to accommodate a wheelchair and allow maneuvering.