Hoists are mechanical or electro-mechanical lifting devices that rely on mechanical advantage to move objects vertically and support hanging loads. Mechanical hoist equipment distributes weight by using pulleys or gears to transfer low force over long distances into larger forces applied over shorter distances.

How do construction hoists work?

The construction hoist is made up of either one or two cars (cages) which travel vertically along stacked mast tower sections. ... For precisely controlled travel along the mast sections, modern construction hoists use a motorized rack-and-pinion system that climbs the mast sections at various speeds.

How does an electrical hoist work?

How Does An Electric Chain Hoist Work? Electric chain hoists have an induction motor and a brake to ensure the load is held when lifting (enabling heavy objects/loads to be lifted safely). The motor converts electrical energy into mechanical energy which can then lift the load/weight.