Building a Block and Tackle Hoist
Building a block and tackle hoist involves the creation of a wood or a metal unit that contains one or more pulleys in combination with an assembly of ropes and blocks. The purpose of hoist is to permit the multiplication of force so that heavy objects can be moved or lifted with less power. This is an amazingly straight forward and simple device to use and it has been a prime tool for centuries, remaining extremely useful even today in the modern world.
Step #1: Obtain Standing and Traveling Blocks
The first step in this process is going to be to obtain a standing block as well as a traveling block, and each of these blocks should incorporate its own single pulley.
Step #2: Choose Blocks Containing Hooks
You are going to want to choose blocks that have hooks because you are going to want to attach them to supports as well as to the load at the same time. The standing block is going to be responsible for being attached to a support, and as a result it is going to need two separate hooks or two separate attachment points. The traveling block, on the other hand, is going to be attached only to the load meaning that only a single hook or single attachment point is going to be necessary.
Step #3: Identify Pulleys
Now what you are going to want to do is to identify whether or not your block pulleys are designed for use with rope cable or with wire cable. You are going to want to find a strong cable or a strong rope that is capable of working with the pulley. At an absolute minimum, the rope that you find should be at least three times the amount of distance that you are planning to hoist.
Step #4: Begin Operation
You are going to want to suspend the double hook block from your support, taking care to remember that the support needs to be capable of withstanding the load's weight as well as its movement. Then you should attach the traveling block hook to the object that you intend on lifting.
Next you are going to want to stand at an angle in relation to the double hook block so that you will be capable of freely moving the rope. Draw the rope up through the pulleys, taking up the slack in the process. You can steadily and slowly pull with the rope intended for lifting until the desired object has been lifted to the desired height, and then you can tie the end of the lifting rope off to keep the object at the right height.
Step #5: Assembly
The blocks should be laid out on a clean and try surface, and the pulleys should be free of moisture, debris and dirt. You should secure the lifting rope's end to the bottom of the block intended for standing. Threading your lifting rope around the traveling blocks' bottom and back up over the standing block's top is all that is left for you to do.