The rear part of the tower crane is called the balance boom (counter boom) because it balances the boom carrying the loads. There are tail, lift drum, cabin, cabin platform and swing gear group on the balance boom.

There are tail balance weights in the tail section that keep the crane in balance. These weights are used to balance the front boom and the rear. The weight lifted also affects the number of counterweights on the counter boom.

With the lifting drum, the up and down movement of the suspended load in the trolley system is provided. Tower cranes are used by trained and certified crane operators. Crane operators' space is usually in the cabin, where the fuselage meets the boom. The cabin has been specially designed and has been designed in such a way that the tower crane operator can be comfortable and have a view of the entire area below.