Field applicability and feasibility of the automated non-powered multi-beam lifting system

This study aims to develop a non-powered multi-beam lifting system (MLS). A MLS is a tower crane accessory that mechanically and subsequently secures and subsequently releases two to three beams in order to shorten the lifting cycle time and improve productivity. Previously proposed MLSs have been motorized systems that would require electricity and lack sufficient safety mechanisms. A non-powered MLS (NPMLS) was developed in this study and the field applicability and economic feasibility of the technology were analyzed through field tests. The analysis results showed that the elimination of lugs and the reduction of labor costs can yield considerable economic benefits. Above all, the major benefits of the NPMLS are improvements in workability and safety during steel construction. Field observations showed the NPMLS to be much safer and to afford much easier control of steel members than the traditional method. In addition, the learning curve of NPMLS was found to be very short.

► This study introduces a non-powered multi-beam lifting system (NPMLS). ► The field applicability and economic feasibility were analyzed. ► The major benefits are improvements in workability and safety. ► The reduction of labor and fabrication costs can yield economic benefits. ► Field observations showed the NPMLS to afford easy control of steel members.