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Construction management in practice
Published in Fred Sherratt, Peter Farrell, Introduction to Construction Management, 2023
Craneage or lifting schedules are produced daily to effectively allocate the ‘hook time’ amongst those who need use of the crane. A full-time tower crane coordinator can be needed if there are many cranes on the site, and each crane will need a designated signaller to control the lifts. The signaller should also ensure any lifting equipment, such as chains, slings or stillages are regularly examined, checked and maintained as required under LOLER. Cranes should be managed to ensure they are working to maximum efficiency at all times – they are expensive and so should not be left standing for long periods with no work. If a full-time crane is not needed on a project, mobile cranes can be brought in for shorter durations to undertake lifting work, which may be more cost effective. On the other hand, if the crane workload has been underestimated, or the crane is positioned incorrectly so it can't reach where it needs to, work cannot progress as planned, and delays to production will quickly mount up. Moving the tower crane or bringing in extra cranes will be very expensive and could even end up being the reason the project no longer makes any profits for the contractor – putting the tower crane in the wrong place is not something you want to get wrong!
Construction of Steel Railway Bridges
Published in John F. Unsworth, Design and Construction of Modern Steel Railway Bridges, 2017
Regularly used mobile cranes include crawler, all-terrain, and truck-mounted cranes. Locomotives cranes may also be used for some railway superstructure erection projects. The appropriate mobile crane depends on the site (access and crane pads) and lifting (weight and radius) requirements of the superstructure erection procedures. Where site conditions allow mobile crane access and mobility, the sequential installation of multiple superstructures of similar weight and dimension using rail cars to transport new and existing spans to and from the site can be very effective from a cost and schedule perspective.
A graphical approach for the determination of outrigger loads in mobile cranes
Published in Mechanics Based Design of Structures and Machines, 2022
Cranes today are an indispensable tool in constructions of any kind. Although the selection of tower cranes or mobile cranes is even a question of culture (tower cranes are mostly used in Europe and Mobile cranes in USA) (Shapira and Glascock 1996), it is undeniable that, due to their mobility and the better lifting-capacity, choosing of mobile cranes is often the best way to solve lifting issues. This capability to move and accomplish several tasks in different sites, increases risks over those faced by stationary cranes.
Causes and prevention of mobile crane-related accidents in South Korea
Published in International Journal of Occupational Safety and Ergonomics, 2022
Jinwoo Lee, Ian Phillips, Zena Lynch
Therefore, efforts should be made to secure the inspection quality of the organizations performing the crane safety inspections. Likewise, it is necessary to ensure safety by strictly inspecting workplaces that had not carried out pre-operation inspection properly. Rules for Occupational Safety and Health Standards 2019 require critical devices such as brakes, clutches, controlling devices and alarm devices on mobile cranes to be checked before working with mobile cranes.