טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentElbaz Avihu
SubjectInvestigation of Tower Crane Cycle Times: Cab-Control Versus
Remote-Control Operation
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Professor Aviad Shapira
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

Tower cranes commonly constitute the bottleneck of production on today's typical building construction projects, and so shortening of crane cycle durations is often the key to increased site productivity. This case study examined one potential determinant of cycle duration that has been largely overlooked in the wide body of cycle time research?the operation mode of top-slewing tower cranes: from the cab or by remote control. This knowledge gap was addressed by providing quantitative substantiation to qualitative evaluations regarding the advantages and disadvantages of both operation modes. The results revealed that there prevail certain conditions under which the two operation modes may yield identical cycle times or even give remote operation an advantage. The study also identified that it is the balance between the fast-travel part of the cycle and the fine-maneuvering part that determines which of the two operation modes will generate shorter cycle times. These findings will be useful for construction professionals who are charged with the task of selecting the operation mode best suited for their project when both operation modes are optional, or when assessing the cost of using a dictated operation mode. Equally important is the contribution for scholars of crane work as offered by the research method used in this study.