Welding lifting lugs

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Is there a procedure or rule of thumb for welding lifting lugs.I see a lot of lugs not welded sufficient in my mind.For the most part I usually make sure the leg of my weld is as thick as the thinner of the material if there is a difference in size.I see a lot of single pass mig welds also.I try to use stick when welding on lugs also.
Reply:Depends on what it needs to lift.Airco Ac/Dc 300 HeliwelderMillerMatic 200 (stolen)Miller Maxstar 150STLMiller AEAD200LE (welding and generating power) Hobart MIG
Reply:I'm in the mining industry so usually everything is heavy and the steel the lugs are made from and been welded to is 1" and thicker.
Reply:Where personnel (anything other than your own personal use that is) are involved the procedure is:1) Contact P.E.2) P.E. reviews lifting lug application3) P.E. develops lifting lug design and welding procedure requirements4) Fab shop makes part(s) per P.E.s design5) Welder assembles/welds it up per P.E.s welding procedure requirementsThat is unless one wants to take on all liability for injuries/deaths should there be a failure then just wing it based on experience.MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110Save Second Base!
Reply:In general I agree with Duane. Personal experience tells me a weld with legs equal to the thickness of the thinner piece being welded to would be sufficient. All the lugs I weld at work are spec'd by an engineer and I am sometimes surprised at what they deem sufficient. How would you know whether or not your lug will need a reinforcing pad welded on first? Why prefer stick weld over mig? A quality mig welded lug will have strength comparable to a stick welded lug. Are there engineers on site that you can consult when you need advice? So many questions..IAMAW Local 330Airco 300 AC/DC HeliwelderAirco Dip-Pak 200 with Profax spool gunPowr-Kraft AC225Everlast PowerArc 200stBuffalo Forge No.21 drill pressSpeedglas 9100xxAirco, Oxweld, Purox, Victor torchesLincoln Ranger 8
Reply:I won't go into the details but I said what I said due to an incident involving lifting lugs on a large (10+tons) piece of equipment built by the company I used to work for.Only acceptable resolution was a new arrangement/procedure designed/developed and certified by a P.E..  Just sayin'.MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110Save Second Base!
Reply:900cfiThis may be 'a little ahead of your question', - but, the sooner you understand lifting - the easier an answer. http://www.thecrosbygroup.com/Deep/deepest - in Crosby literature there are tech/specs for welding - 'Proof-Tested' lugs.This may exceeds your requirements - but, you will be better served if you look; from the top-down - then from the bottom-up.   Opus.Last edited by OPUS FERRO; 03-12-2015 at 12:33 AM.Reason: [may]
Reply:Originally Posted by OPUS FERRODeep/deepest - in Crosby literature there are tech/specs for welding - 'Proof-Tested' lugs.
Reply:Hey Duane, no see in a while.Per your pdf...........lot of people don't seem to realize just how much a weld will hold.  D-rings have relatively small welds for the work they do.  Properly used, the D-ring is in tension, and it's the strongest attribute of the weld (tensile strength)"Any day above ground is a good day"http://www.farmersamm.com/
Reply:On a lug, I'd want fillets on each side with a total cross sectional mass equal to the thickness of the lug.  On thinner base material, I'd still want large fillets on both sides to resist tearout by spreading the load.  Ideally, I'd really want a good sized pad under the lug if on thin material, but not so wide that you'd buckle the middle of it because there's no welds inside the perimeter."Any day above ground is a good day"http://www.farmersamm.com/
Reply:Hopefully this thread has nothing to do with my posts OP
Reply:Originally Posted by duaneb55I won't go into the details but I said what I said due to an incident involving lifting lugs on a large (10+tons) piece of equipment built by the company I used to work for.Only acceptable resolution was a new arrangement/procedure designed/developed and certified by a P.E..  Just sayin'.
Reply:My 2 cents... FOLLOW the procedure.. if i had the choice to weld pad eyes either stick or dual shield wire? I choose wire... why? No starts and stops when the rod runs out... Do I weld them with stick? You bet!! All things considered.. FOLLOW THE PROCEDURE!!
Reply:Originally Posted by duaneb55These are very popular with heavy equipment transport trailers and heavy towing/recovery equipment.http://www.thecrosbygroup.com/wp-con...04/204_205.pdf
Reply:In my opinion, the best lifting lugs / pad eyes have the most weld volume. This picking frame was designed by a PE. The flanges, and web of the 36” beams were cut out. The lifting lugs inserted, and welded all the way around. These 4-lifting lugs are only picking up 325-tons. Attached ImagesDon’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Nowadays everything critical gets engineered and qc'd.  Found this a while back, hope it's readable.  Note that the recommended fillet size seems small compared to lug thickness. Attached Images
Reply:Look at a lifting hook for an SA 200. I wouldnt want to be under it and thats for sure.
Reply:Originally Posted by CEPIn my opinion, the best lifting lugs / pad eyes have the most weld volume. This picking frame was designed by a PE. The flanges, and web of the 36” beams were cut out. The lifting lugs inserted, and welded all the way around. These 4-lifting lugs are only picking up 325-tons.
Reply:my rule of thumb when welding lifting eye's is that more is better and wrap the corners. i think it's better to err on the side of safety. on the javits center 60' beams from lehigh fabricators came one to a trailer and had 2 three inch thick lifting eye's welded to the top flange.i.u.o.e. # 15queens, ny and sunny fla
Reply:those weld on D rings are not for overhead lifting only for cargo securement.     for lifting and rigging purposeses this is my go to  http://www.thecrosbygroup.com/html/d...htm#/en-US/174Vantage 500's LN-25's, VI-400's, cobramatics, Miller migs, synch 350 LX, Powcon inverters, XMT's, 250 Ton Acurrpress 12' brake, 1/4" 10' Atlantic shear,Koikie plasma table W/ esab plasmas. marvel & hyd-mech saws, pirrana & metal muncher punches.
Reply:Rule of thumb for this kind of stuff can get one into a lot of trouble quickly.  So the short answer is there is no rule of thumb, or no rule of thumb other than the basic engineering equations/considerations that must be used if it is to be done correctly without "taking a chance".  These equations take into account what is to be lifted, the loading (dead weight, wind, waves, added mass, dynamic loads, shock loads, bending, shear, tension, some combination of all or whatever), the criticality of the lift, how many times the item has to be able to do it, the base material characteristics, the filler metal characteristics, and the environment the item is to be used in.