Iowa Admin. Code r. 875-73.5 - Dumbwaiters
All dumbwaiters whether electric or hand powered conform to ANSI A17.1 (1971), section 700. Exceptions: Required rules for hoistway construction as set forth in ANSI A17.1 (1971), do not apply to existing installations.
Notes
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(1) Each electric elevator shall be provided with an electric brake.
(2) Each brake shall be of the friction type applied by a spring or springs or gravity and released electrically. The brake shall be capable of holding the car at rest with its rated load.