The Crab Assembly is used to lifting heavy load from one place to another. The crane consists of one girder beam, with trolley and hoist running on the bottom flange of the single girder. The single girder crane has simple structure, low operating cost, quick installation and easy maintenance. EOT crane, also known as electric overhead travelling crane, is the most common type of overhead crane used in many factories, warehouses, material yards, etc. These cranes are electrically operated by a control pendant, remote control or from an operator cabin attached to the crane. It is one of the types of overhead cranes, which is also called as bridge cranes. The Crab Assembly is very effective.