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Thread: Hoist
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8th September 2013, 11:47 PM #16Distracted Member
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I was kind of hoping this thread would wander in this direction, that is 'How much can I safely lift on this structure?', because I would like to figure that out about my shed roof. Now the OP - Christian - says he intends to build a gantry, which has a lot going for it, but using existing structures may still be relevant for many of us. But maybe we should split off a new thread?
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9th September 2013, 02:12 AM #17Chief Swarf Maker
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There is no crossbar as such, or gantry. The roller doovy clamps over any of the 4 roof trusses, anywhere along. Pictured it is on the 2nd truss, in the middle, approx 100mm from the vertical support which goes to the pitch of the roof.
The trusses are 28mm heavy wall pipe.
The black vertical supports are moveable, 2" tube, heavy gauge angle approx 8" long to spread the load up top and 100x100 feet on 1" threads to adjust the height. They lock in without the need for bolts by adjusting the height a bit bigger and wedging them in. This means i can lift almost anywhere in the shed and doing engines there is only 900mm 'unsupported' to each big vertical beam. (Dont forget the support that goes upwards as well)
There is also supports going back to the previous truss to stop them pulling backwards (and hold shelving!)
7m-ge fully dressed weighs 220kg, i have lifted this well over 20 times using the rig with no issues. The only time i ever bent a roof beam was trying to lift my old Pitts lathe out of the trailer, which was closer to 1000kg
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9th September 2013, 11:14 AM #18Senior Member
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- Newport, Victoria
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The ceiling height is around 2.4 - 2.7 so I don't have much to play with, particularly if I have to lift the mill. I want to make my gantry height adjustable so I can lower it to get it through the garage door and make it higher if I need to get something off the trailer. So the come-along-type type with the shorter chain is probably all I need. I might but a bid on the one you mentioned.
Christian
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9th September 2013, 11:46 AM #19SENIOR MEMBER
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G'day Christian.
Did you see the gantry at the local pilots place? I believe that's for sale, and its getting closer to going, going, gone time*. That must be some where around the 2.7m height, and has the two hydraulic rams, for height adjustment. It would certainly be a good start, even if it needed modifications. It has castors all ready.
Don't forget with the come-a-long type. Use it up side down, the hook of the chain end onto the top beam, then the handle is just over what ever you are lifting.
Regards Phil.
* I think I sold his lawn mower yesterday, He just doesn't know it yet.
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9th September 2013, 12:22 PM #20Senior Member
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G'Day Phil,
Ah yes, I think the pilot described it as the "russian tank of gantries". I was thinking of something less big boned... but i'll chase him up.
Christian
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9th September 2013, 09:16 PM #21
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11th September 2013, 02:09 AM #22Senior Member
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- May 2012
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- Kimberley, West Australia
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Winches as hoists.
Have never been sure that electric winches were safe to use for hoisting. Most come with a warning that they are not suitable for this purpose. The brake is only there to hold a load when winching, and is not rated for prolonged lowering. The little fibre brake disc in them has been known to overheat and/or disintegrate when lowering heavy loads, and it is a scary moment when you find a load descending in angel gear!
A real hoist has a brake unit on its motor, and not just a small worm activated disc on the gear train. If something goes amiss with this your insurance company will disown you vey quickly. Just my opinion, Combustor.Old iron in the Outback, Kimberley WA.
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11th September 2013, 07:04 AM #23It's all part of the service here at The House of Pain™
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