Figure 13-41.—Proof Test/Inspection Sheet.
Storage
Wire rope slings and associated hardware must be
stored either in coils or on reels, hung in the rigging loft,
or laid on racks indoors to protect them from corrosive
weather and other types of damage, such as kinking or
being backed over. Slings are not to be left on the crane
at the end of the workday.
MECHANICAL, ADVANTAGE
The push or pull a human can exert depends on the
weight and strength of that individual. To move any load
heavier than the amount you can physically move, a
mechanical advantage must be used to multiply your
power. The most commonly used mechanical devices
are block and tackle, chain hoist, and winches.
Figure 13-42.—Parts of a fiber line block.
BLOCK AND TACKLE
A block (fig. 13-42) consists of one or more sheaves
fitted in a wood or metal frame supported by a shackle
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