Simple Rope Mechanical Advantage System
Simple Rope Mechanical Advantage System :
A rope mechanical advantage system containing the following: (a) A single rope; (b) One or more moving pulleys (or similar devices), all traveling at the same speed and in the same direction, attached directly or indirectly to the load; (c) In the case of mechanical advantage systems greater than 2:1, one or more stationary pulleys or similar devices. NFPA 1670, 1999 ed
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