- Joined
- May 27, 2016
- Messages
- 3,469
This is exploring the beginnings of what it takes to conveniently lift stuff around a workshop. I can still (just about) manage a 25kg cement bag under each arm, but I strain a few valves on the way. I get it that one can have a hydraulic arm thingy usually used for car engines, but its a tad inconvenient in that it needs to put it's legs and wheels somewhat under benches, and needs a lot of space around it.
My notion was to provide each side of a 6m long little shop (that's about 20ft), with RSJ steels up at the ceiling level, hooked to every joist, and figure out a gantry beam with rollers each end, and a winch. To be able to grab onto a winch hook, and move heavy stuff just anywhere seems attractive, even if it's just a heavy chuck I don't want to drop on the ways.
So the question is .. what is a reasonable size beam to span the 3.65m width, (about 12ft), and expect to lift (say) a mill drill or other stuff up to about 220kg (that's about 480lb)? I suppose one might throw in a bit for unknown future heavy stuff, and some for a factor of safety.
Another related question is, what is a reasonable deflection it can have when fully loaded? One does not want the thing to very visibly sag, but it would be nice to know a reasonable number. My instinct says 1 or 2 mm, but what is the norm with this stuff?
My notion was to provide each side of a 6m long little shop (that's about 20ft), with RSJ steels up at the ceiling level, hooked to every joist, and figure out a gantry beam with rollers each end, and a winch. To be able to grab onto a winch hook, and move heavy stuff just anywhere seems attractive, even if it's just a heavy chuck I don't want to drop on the ways.
So the question is .. what is a reasonable size beam to span the 3.65m width, (about 12ft), and expect to lift (say) a mill drill or other stuff up to about 220kg (that's about 480lb)? I suppose one might throw in a bit for unknown future heavy stuff, and some for a factor of safety.
Another related question is, what is a reasonable deflection it can have when fully loaded? One does not want the thing to very visibly sag, but it would be nice to know a reasonable number. My instinct says 1 or 2 mm, but what is the norm with this stuff?