Drums should be sized to accommodate the length of line equal to the actual distance a load will travel.
As shown in the illustration below, the load cannot travel any further than the first change of direction sheave. Therefore, the drum needs to be sized to accommodate this distance, not the distance from the load to the hoist or winch.
In applications utilizing multiple parts of line, the drum capacity must be increased to accommodate the extra line used for this type of rigging.
Allied Power Products, Inc. has specialized in providing winches, hoists, capstans and cranes to meet our customers’ specific application requirements for more than 30 years. Contact us today for a solution to your application needs.