How to Build a Four to One for Hoisting

A hoist is a device traditionally used to lift or lower heavy loads. Four-to-ones are a specific type of hoist that can move four times the amount of resistance applied to them. Without hoists, raising heavy loads would be quite difficult, if not all-out impossible. Though four-to-one hoists can be purchased at home improvement or hardware stores, making them at home is an effective way to save some hard-earned money.

Double pulley block
Single pulley block
Rope
Tape measure

Instructions

- 1
  Become familiar with the double and single pulley blocks. In general terms, a pulley block is a device consisting of a grooved wheel, through which a rope can run. Double pulley blocks traditionally contain two grooves through which the rope can move. Pulley blocks typically have two eye hooks, found at the top and bottom of the machine. In most cases, the top eye hook is substantially larger than the one found on the bottom of the pulley block.
- 2
  Position the double and single pulley blocks. To build a four-to-one for hoisting, the blocks should be arranged so that the larger eye hooks are facing away from each other, and the smaller ones towards each other.
- 3
  Prepare the rope. For the greatest hoisting power when building a four-to-one, a significant amount of rope is required. Traditionally, a rope that is at least four times as long as the distance from the ground to the final resting spot of the load is required. For example, an item that is to be lifted 5 feet from the ground requires a rope that is at least 20 feet long.
- 4
  Attach the two pulley blocks. Thread the end of the rope through one of the grooves on the double pulley block. Draw the rope through the pulley, and thread it through the groove on the single pulley block. Finish attaching the two pulley blocks by running the rope back through the remaining groove on the double pulley block.
- 5
  Secure the rope to the single pulley block. Tie one of the ends of rope to the smaller eye hook on the single pulley block. Make sure this knot is as secure as possible for best results when it comes to hoisting heavy loads.
- 6
  Secure the double pulley block to an overhead support with a short piece of rope. Sturdy beams, tree branches and rafters can all be used for support.
- 7
  Attach the load to the four-to-one. Pull the single pulley block to the ground or floor. Use a short piece of rope to tie the load being moved to the larger eye hook on the single pulley block. Pull as hard as possible on the free end of the rope to move the load in question.

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