2nd trolley systems in container cranes
Report 2006.TL.7075, Transport Engineering and Logistics.
The amount of containers that a quay crane can handle within an hour can be
raised by the application of a second trolley system. Ship can leave the
port earlier, or larger ship can be handled. Many second trolley systems
have a platform to store the container temporarily. The supply of containers
to the terminal become smoother by the use of a platform, as a result more
containers can be handled.
In this literature search several published concepts have been treated.
These concepts are second trolley systems with a fixed platform, with a
moveable platform, systems with an ongoing container transport and systems
without a platform.
It is impossible to designate one concept that fits in all situations. The
choice for a concept depends among other things on the available budget, the
desired crane productivity and if the concept is applied on a new or
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