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Rosenfeld, Y. and Shapira, A.
Automation of existing tower cranes: economic and technological feasibility
Automation in Construction 7 (4) (1998) pp. 285-298
Tower cranes enjoy a long useful working life. Therefore, a vast population of cranes are still in use today that do not feature the advanced automation and sensor technologies such as those with which some of the new models are equipped. This paper examines the technological and economic feasibility of retrofitting existing tower cranes with semi-automatic devices for motion control. The proposed improvements are intended to enhance the cranes' efficiency and their capacity to meet the challenges of today's tightly scheduled construction projects. Based on work studies and analyses of craning cycles, the concept offered by the proposed improvements distinguishes between the long-distance navigation of the crane's hook and the fine maneuvering in the loading and unloading zones. The expected economic benefits resulting from the enhancement of the crane's performance, with regard to both types of motion, far exceed the cost of installing the various devices.