Mechanical advantage assembly of a rope and pulleys that is used to lift loads. A number of pulleys are assembled together to form the blocks, one that is fixed and one that moves with the load. The rope is threaded through the pulleys to provide mechanical advantage that amplifies that force applied to the rope. In order to determine the mechanical advantage of a block and tackle system consider the simple case of a gun tackle, which has a single mounted, or fixed, pulley and a single movable pulley. The rope is threaded around the fixed block and falls down to the
Rigging (material handling) Rigging (material handling) Rigging is both a noun, which is the equipment and a verb, which is the action of designing and installing the equipment, in the preparation to lift, lower, hoist or move objects. A team of "riggers" design and install the lifting or rolling equipment needed to raise, roll, slide or lift objects such as with a crane or block and tackle. "Rigging" comes from "rig", to set up or prepare. Rigging is the equipment such as wire rope, turnbuckles, clevis, jacks and slings used with cranes and other lifting equipment in material handling and structure relocation. Rigging