T039900E
Reeving Wire Rope Standard Number of Parts of Line WARNING If the wire rope is reeved in a number of parts of line greater than the standard and the boom is raised to a large angle, the extra wraps of rope that should be left on the drum will be unwound before the hook block reaches the ground, causing damage to the wire rope and its anchor at the winch drum. Even with the standard number of parts of line, this problem will arise if the load is lowered below ground level. When the number of parts of line is greater than the standard or the load is being handled on a site that has a significant elevation differences, ensure that more than three wraps of rope will remain on the winch drum while the load is lowered. When the number of parts of line is less than the standard, be sure not to exceed the allowable load for one part of line. (See the "INFORMATION AND DATA" section.) The following table shows the standard number of parts of line for different boom lengths. Select the number of parts of line that ensures the most efficient operation, taking into consideration boom length, load mass, hoisting speed and other conditions such as winch drum wire rope capacity.
Reeving Wire Rope
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Reeving Wire Rope
