Stiff boom cranes are truck-mounted loader cranes that lift, move, and load or unload cargo using a rigid, straight telescopic boom. The boom sections slide in and out to adjust the reach while remaining aligned, rather than fold at articulated joints as they do on knuckle boom cranes. ZOOMLION stiff boom cranes handle loads such as construction materials and equipment, both during loading and unloading and when placing them at the worksite. Since they are mounted on cargo trucks, the same vehicle can transport the cargo and unload it at the site.