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a device installed on an elevator, dumbwaiter, or material lift car or counterweight to equalize automatically the tensions in the suspension wire ropes.
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Related Code Sections

2.20.5 Electric Elevators, Suspension Member Equalizers
Suspension member equalizers, where provided, shall be of the individual compression-spring type or shall meet the requirements of 2.20.5.3. Springs ...
5.3.1.13 Special Application Elevators, Suspension Means
(a) Suspension means shall be not less than two wire ropes or two steel roller-type chains conforming to ASME B29.1. (b) Aircraft cable rope of 7 x ...