Jib crane

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Here is the new jib crane that I built and installed over my lathe. I am getting to old to be changing them 150lb chucks by hand now days! also helps for loading them heavy chunks of iron. Next will be a small mono rail over the fab table.LarryMiller XMT 304 CC/CVSyncrowave 180 SDLincoln PowerMig 255XTTermalDynamics 52Lincoln 305GComlpete machine shop to back it up
Reply:Looks good! you should load test it @ 25% over the intended capacity then mark the beam with the swl (capacity)
Reply:The most it will ever be  loaded to is 500lb, I am a one man show so I don't have to worry about some knot head getting crazy with it. the post is 6"sch 40 and the beam is 8" , the base is 2'X2'X 5/8LarryMiller XMT 304 CC/CVSyncrowave 180 SDLincoln PowerMig 255XTTermalDynamics 52Lincoln 305GComlpete machine shop to back it up
Reply:That looks great!  Wish I had one in my shop.If you intend on lifting 500lbs with it, might be good to see what happens out near the limit of travel.  At 4' from the post you might have close to 2000lb load on that beam and the 2 bolts on the far side of the beam in the floor.  If you do a quick test while you are safe and ready for a failure it will give you the peace of mind to use it the way you want to.My engineering specialty has nothing to do with materials, however I suspect that you might want to add a gusset to a collar that can rotate with the beam and still provide support.  Might also be good to consider those bolts and make sure you are comfy with them.  Consider where the lifting force is focused if the beam is at 45deg angle off the plate - a significant portion of that leverage is applied to the bolt on the far corner.Hobart LX235Victor 250 Oxy-Acetylene Rig (welding and cutting)Bobcat 773F-350, 1999, 4x4, 16' 10K# trailerOutdoor Wood Burner - 10 cords/year
Reply:Originally Posted by gwileyhowever I suspect that you might want to add a gusset to a collar that can rotate with the beam and still provide support.
Reply:I didn't see a stop at the end of your beam.. It may be a good idea to install removable one..Equipment:06 F-450Classic IIInvertec V205-T AC/DCLN-25 PROPro-Cut 80Milwaukee Power Tools
Reply:Originally Posted by JONESeeI didn't see a stop at the end of your beam.. It may be a good idea to install removable one..
Reply:2nd all the above.....looks like a great addition to the shop though!
Reply:The boom has a stop on the end you just cant see it on the pics, I have put 350lbs on the end of the boom so far with no problems. I might take the advice and add a gusset just to be more safe. the base plate has three 5/8 bolts 4" deep in the floor on the far side where most of the load will be pulling from. The structure of the crane I am confident in, the bolts in the floor is what I was unsure of. Thanks for all of the input, it's always welcome and helpfull.LarryMiller XMT 304 CC/CVSyncrowave 180 SDLincoln PowerMig 255XTTermalDynamics 52Lincoln 305GComlpete machine shop to back it up
Reply:I would some addtional 3/4" anchors to hold it in place on the backside.Lincoln 300 Vantage 2008300 Commander 1999SA250 1999SA200 1968Miller Syncrowave 200XMT350MPA/S-52E/xr-15Xtreme 12vs Millermatic 251 w/30A  Millermatic 251 Dialarc 250 Hypertherm 1250 GEKA & Bantom Ironwokers
Reply:Second the anchor suggestion since catching the load AND the crane wouldn't be much fun.
Reply:Not that I'm an expert but I'm thinkin 2 things  (plus the stop) but never mind that first is gussets post to plate and I would like to see the post extend above the beam and a brace from a pivot to the beam. Just my 2 cents and considering I'm not selling it, prob not worth much..  Nice project.Miller thunderbolt 250Decastar 135ERecovering tool-o-holic ESAB OAI have been interested or involved in Electrical, Fire Alarm, Auto, Marine, Welding, Electronics ETC to name a just a few. So YES you can own too many tools.
Reply:Larry, I have 4 jibs I fabbed for myself. Did not trust lags so I busted hole through slab and cemented larger pipe in ground as deep as my post hole digger went. Smaller jib tube swivels in cemented one. Picks up a 6.5 turbo- I guess about 700 lbs and swings well. I see you are a one man show also, fun aint it? Where is your place?PeterEquipment:2  old paws2  eyes (that don't look so good)1  bad back
Reply:that's a nice addition to the shop.  that will work nicely with to chuck tree.Sound like a lot of guys don't have faith in  anchors !    The hilti drop in anchors are amazeing what they can hold.   The bolt /studs ones on the other hand.......DayePound to fit, paint to match
Reply:Back when I was a framer I saw a test of the hilti epoxy. A 2 x 2' cube of cement , in the ground, had a hole , about 1 1/2" diameter and 6 or 8" deep, drilled then an eye bolt was glued in. Next day a small crane grabbed the eye bolt and pulled the whole block up out of the ground. Damned impressive. Eye bolt was not a sleeve anchor. The epoxy held. Imagine a drilled hole , epoxy applied, and then inserting a sleeve anchor and torquing it and then letting it cure a day. I'll bet that could hold a serious load. Just a thought. I suppose to remove whatever you bolted you could cut flush and grind. Mike
Reply:Originally Posted by castweldLarry, I have 4 jibs I fabbed for myself. Did not trust lags so I busted hole through slab and cemented larger pipe in ground as deep as my post hole digger went. Smaller jib tube swivels in cemented one. Picks up a 6.5 turbo- I guess about 700 lbs and swings well. I see you are a one man show also, fun aint it? Where is your place?Peter
Reply:very nice..
Reply:The Red Head wedge bolts are NOT designed for nearly as much pullout resistance as the glue in ones.There are MANY types of glue in concrete bolts.  Some are not as good as others.  Just research the accident at the "big dig".
Reply:Larry, you sound like a man that knows his and his equipments limits and that is the best safely you can get. So if you know when to say when, you're all good. That said, regarding the bolts used. They are only part of the equation when mounting to a slab. The finest quality, NASA epoxied in anchor is only as good as the concrete it's in. Bad pour, thin spot, aggregate void can ruin your day in a heartbeat.200amp Air Liquide MIG, Hypertherm Plasma, Harris torches, Optrel helmet, Makita angle grinders, Pre-China Delta chop saw and belt sander, Miller leathers, shop made jigs etc, North- welders backpack.
Reply:If you are worried about it just strongback to the purlin. It's not intended to hold a bunch of pull but it's more than nothing.Did you use a lift truck to get everything up or pull from above? I know about the one man shop thing myself.  Matt
Reply:Originally Posted by Matt_MaguireIf you are worried about it just strongback to the purlin. It's not intended to hold a bunch of pull but it's more than nothing.Did you use a lift truck to get everything up or pull from above? I know about the one man shop thing myself.  Matt
Reply:question about the above statements of the rear anchor bolts holding "all of the load". Like in standing a column at work with 4 anchor bolts. 2 bolts will be in compression, and 2 will be under tension. Saying that the back bolts on the above project "have all the load", that means the front bolts have zero compression load? The pull out strength of the wedge anchors are quite high; you can find the numbers online, or in one of the HIlti books.Weldanpower 225 G7Ironworkers Local #24
Reply:Yes, the pullout strength of the wedge anchors is quite high, if inserted correctly (proper depth).The longer anchors (set deeper) aren't necessarily stronger, as after about 4" of depth, either the shank of a 1/2" anchor will fail in tension, or the concrete fails.  Yeah, they hold pretty well.The adhesive anchors are something like 50% better in tension, IF put into a clean hole (you need to blow or brush all dust out of there before applying the adhesive.On that note, when I put these wedge bolts into a concrete slab, I always drill all the way through.  That way, one day when I don't want the bolts around any more, I just hammer them through, and fill the hole.Don't even think about pulling them out.Now, as for the front anchors in compression.  IF the nut is only on top, and the part is resting on the concrete, where exactly is the front anchor in compression.  It is still in tension, because of the nut, but it isn't doing any useful work.  The concrete is in compression.  Anyway, if the wedge were in compression, it would just slide down.
Reply:Hey guys I realize this is an old thread.....but why not put a guy wire at the top of the post and attach it to the nice steel beam right behind it. My 2 cents.
Reply:Hey guys I realize this is an old thread.....but why not put a guy wire at the top of the post and attach it to the nice steel beam right behind it. My 2 cents.