Jib crane is used to raise heavy loads. A load W is lifted up by pulling chain through pulley D as shown in adjacent figure. Member CD is known as tie, and member AD is known as jib. Tie is in tension and jib is in compression. AC is vertical post. Forces in the tie and jib can be calculated. Very often chain BD and Tie CD are horizontal. Determination of forces for a given configuration and load is illustrated through numerical examples
