Masonry contractors in Germany, Italy, France, and other western European countries generally use self-erecting tower cranes to place scaffold components, set cubes of block and brick at work stations, and keep masons supplied with mortar. Though not marketed here, these cranes are well-suited to crowded urban construction sites. The European machines have two main components--a tower element and a jib that extends horizontally from the top of the tower. Depending on the make and model, the cranes' vertical towers range from about 62 to 150 feet (19 to 46 m) tall when erected, with jibs extending horizontally from 82 to 164 feet (25 to 50 m). Maximum lift capacities generally range from about 3,500 to 13,200 pounds (1,600 to 6000 kg), when the lift hook is positioned nearest the tower. The main crane components are jointed, so they fold up for transport, usually on a trailer. A second truck with a separate crane is used to transport the tower crane's counterweight. The truck crane is then used to lift the tower crane from the trailer, set it on a level base, and place the counterweight.