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Building Codes & ADA Accessibility Requirements Flashcards

6 cards from real IDFX practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. According to ADA guidelines, what is the minimum clear width required for an accessible doorway?

    Answer: 32 inches

    ADA requires a minimum 32-inch clear opening width for accessible doorways, measured between the face of the door (open 90 degrees) and the opposite stop. This accommodates most wheelchair users.

  2. What is the maximum height for an operable part of a forward-reach control (such as a light switch) under ADA standards?

    Answer: 48 inches above the floor

    ADA specifies a maximum forward reach height of 48 inches for operable controls, ensuring they are accessible to individuals in wheelchairs without requiring them to reach excessively high.

  3. What is the minimum required turning radius for a wheelchair in an accessible space?

    Answer: 60-inch diameter circle

    ADA requires a 60-inch (5-foot) diameter clear floor space for a wheelchair to make a 180-degree turn, or alternatively a T-shaped turning space of specific dimensions.

  4. What does the International Building Code (IBC) classify as a 'means of egress'?

    Answer: A continuous and unobstructed path of travel from any occupied point to a public way

    The IBC defines means of egress as the complete system providing a continuous path from any occupied portion of a building to a public way, including the exit access, exit, and exit discharge.

  5. In interior design, what does a Class A fire rating for interior wall finish materials indicate?

    Answer: The material has the highest level of flame spread resistance with a flame spread index of 0-25

    Class A (or Class I) finish materials have a flame spread index of 0-25 and a smoke developed index of 0-450, providing the highest level of fire performance for interior finishes per building codes.

  6. What is the maximum ramp slope permitted by ADA for an accessible route?

    Answer: 1:12 (one inch of rise for every 12 inches of run)

    ADA limits accessible ramp slopes to a maximum of 1:12, meaning for every inch of vertical rise, the ramp must extend at least 12 inches horizontally, ensuring safe wheelchair navigation.