Tower cranes provide an excellent combination of height and lifting capacity and are designed for erection of tower-type structures. High operating speed is one of the main advantages of the crane. For stationary installation, a tower crane can be anchored or placed on cross frames. In the first case, large anchor bolts embedded deep into a concrete pad support the base of the crane. In the second case, metal cross frame elements are constructed on a fixed base. Tower cranes are transported and assembled car crane support. Tower cranes are transported in trailer trains and then must be assembled using a mobile crane.