CAPS Universal Design Principles & Accessibility Standards 2 — Questions and Answers
Question 1: In the context of aging-in-place design, 'visitability' primarily refers to:
- The aesthetic curb appeal of a home's exterior
- Basic accessibility features that allow people with mobility impairments to visit or live in a home (Correct answer)
- Advanced smart home technology installed for guest convenience
- The ease with which a home can be toured for sale
Correct answer: Basic accessibility features that allow people with mobility impairments to visit or live in a home
Visitability refers to a minimum set of accessibility features — including a zero-step entrance, wide interior doors, and a main-floor bathroom — that allow people with disabilities to visit or reside in a home.
Question 2: For a forward approach at a kitchen or bathroom counter, what is the minimum knee clearance height required per ANSI A117.1?
- 24 inches
- 27 inches (Correct answer)
- 30 inches
- 34 inches
Correct answer: 27 inches
ANSI A117.1 requires a minimum knee clearance of 27 inches in height beneath counters and work surfaces to accommodate a person in a wheelchair approaching forward.
Question 3: According to ADA accessibility standards, the maximum height for operable controls (such as light switches) in a forward reach configuration should not exceed:
- 44 inches
- 48 inches (Correct answer)
- 54 inches
- 60 inches
Correct answer: 48 inches
The ADA requires that forward reach controls be no higher than 48 inches above the finished floor, ensuring they are reachable by wheelchair users and people of shorter stature.
Question 4: Lever-style door handles are strongly preferred over traditional round doorknobs in aging-in-place design primarily because they:
- Are significantly less expensive to purchase
- Require less grip strength and hand dexterity to operate (Correct answer)
- Are required by all local building codes for residential use
- Provide a higher level of security than knob-style hardware
Correct answer: Require less grip strength and hand dexterity to operate
Lever handles can be operated with a closed fist or wrist, making them accessible for individuals with arthritis, limited grip strength, or reduced dexterity — a key consideration in aging-in-place modifications.
Question 5: What is the maximum threshold height permitted at exterior doorways under ADA accessibility standards?
- 1/4 inch
- 1/2 inch (Correct answer)
- 3/4 inch
- 1 inch
Correct answer: 1/2 inch
The ADA limits threshold heights at exterior doorways to 1/2 inch maximum, and thresholds between 1/4 and 1/2 inch must be beveled to reduce the trip hazard.
Question 6: The Universal Design principle of 'Tolerance for Error' means that a design should:
- Allow contractors to deviate from building codes within reason
- Minimize hazards and adverse consequences of accidental or unintended actions (Correct answer)
- Accept a percentage of defects during the construction phase
- Require minimal maintenance over time
Correct answer: Minimize hazards and adverse consequences of accidental or unintended actions
Tolerance for Error means the design arranges elements to minimize hazards and mistakes, and provides warnings and fail-safe features so that accidental actions do not cause injury or serious consequences.
Question 7: According to ADA standards, the minimum distance from the centerline of a toilet to the adjacent side wall (non-transfer side) is:
- 12 inches
- 16 inches
- 18 inches (Correct answer)
- 24 inches
Correct answer: 18 inches
ADA standards require the toilet centerline to be a minimum of 18 inches from the adjacent side wall on the non-transfer side, providing adequate clearance for positioning.
CAPS Universal Design Principles & Accessibility Standards 2
In the context of aging-in-place design, 'visitability' primarily refers to: