Jib crane Mechanism:

Sol.: Jib crane is taken in use to raise heavy loads. A load W is lifted up by pulling the chain through pulley D as shown in the adjacent figure. Member CD is known as tie and member AD is called as Tie is in tension and jib is in compression. AC is the vertical post. Forces in tie and jib can be calculated. Chain BD and Tie CD are not often horizontal. Determination of forces for AC given configuration and load is explained through numerical examples.