How Do You Set Up A Double Pulley System?
Reeving blocks to set up a double pulley system requires a little thought. A double pulley system, also known as a “block and tackle,” consists of the pulleys, or blocks, and the tackle, the ropes riven through the blocks. You must decide if you will use a double pulley system with one sheave–the roller in a pulley–in each block, which will give you a mechanical advantage of 3 to 1, or a double pulley system with two sheaves in each block, which will give you a mechanical advantage of 5 to 1. Lay the blocks on the deck, 2 to 3 feet apart, with one block on its side and the other on its face. The hooks should point away from each other. The block lying on its side will be the upper block of the tackle; the bottom block will attach to the load. Reeve the line from the left, through the sheave of the block lying on its side. Reeve the rope through the sheave of the block lying on its face. Bring the rope up to the becket of the block lying on its side and secure it to the becket with a
