On Jun 23, 2:24*pm, "Pete C." wrote:
...
I'm trying to design a lift system that can lift a loaded (up to 60k#)
ISO intermodal cargo container 4'+ vertically so that a container
chassis or regular flatbed trailer can be backed under it for
loading/unloading similar to the way "slide in" truck campers are loaded
and unloaded. A further complication is that the lift unit should be
able to break down into components that are not more than about 150#
each, and be able to be assembled and disassembled by one person in a
reasonable amount of time, say 1hr. ...

* * * * Pete C.

That is an incredibly tall specification order you are trying to fill
there. You want 150 lb. components that one person can put together in
an hour? And that can hoist 30 tons?

Generally, those Conex boxes are handled by really HUGE overhead
trolley cranes at the dock side.

I'd say you could build a permanent in place rig to handle a load like
that, but I seriously doubt you can build one that tears up and down
in an hour that can handle that load. And I wouldn't trust it period.
One broken bolt, pin, etc., and kaboom.

That said, you may want some type of scissors jack apparatus that
lifts the box by attaching to its top and that has hydraulic cylinders
manipulating the scissors.

How that will break down into 150 lb parts is unknown.

Or a block and tackle type device that attaches to the box top.

Once again, how that will break down into 150 lb parts is unknown.
Dave