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This is how I solved the problem with an even lower ceiling than OP has and with much higher weight capacity requirements:
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Like unistrut but more better is spanco track. You can build a very low profile bridge crane for 1/2 ton +- and also have your wire feed on the same bridge.
disclosure: We do some processing for Spanco
Personally, what I'd do is put a roller track in the ceiling have the wire feeder hanging at a convenient height, then have the power cable hung from a roller every few feet or whatever. Like a power cable going to an electric hoist on a jib crane. Well... I guess any crane with a traveling electric hoist.
Sent from that other place, no not that one, the OTHER other place using Tapatalk.
Were it me, I'd build a ceiling hugging bridge crane and suck the wire feeder as tight to the ceiling as possible. Build two runners, one fore and one aft, with the wire feeder in between rather than hanging below a single runner.
AKA "Festooning".....
cable festooning at DuckDuckGo
Just another thing to think about - I've seen push-pull guns with 50 foot leads. They aren't cheap, but neither is building a bridge crane. I think MK Products or something like that is the name of the company I'm thinking of. Not sure of the exact cost, but I know that when you order them you specify what wire feeder you're using and they make it to fit. I dunno if they're worth it - I prefer stick welding... I still have the same spool of wire on my MIG that I put on there a year or two ago.
That'll work. Pick up some Irwin "Speedbor" bits. They work pretty well. You may want to drill to final size from the bottom of the OSB. You're liable to get a lot of "blow out" on the back side of the hole. Maybe pilot with an 1/8" bit from the attic and finish the hole from the bottom side with a Speedbor and a ladder.Some guy put 8" of polyiso insulation with osb on it, I think I will send Wonder Woman up there in the attic with a cordless drill and have her drill holes next to the rafters then drop me down the threaded end of some "J" bolts. I will have to make her some kind of simple fixture to get them straight but that's easy
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