Welding Anchor Bolts

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HI...We have a problem in our company. The constructor made a mistake with the projection length over the concreteof the anchor bolts in a big foundation. The length of the bolts are short of necessary, and now they want toweld a piece of bolt in order to get the right length. The Anchor bolts have a diameter of 2" and the materialis SAE 1020.Any of you have experience with this problem?. I will like to hear your experiences or ideas.Any advice will be welcome.ipad cases
Reply:I think my only question would be what does the building inspector say. Could be they may not even allow this you would need to contact your inspection service and find out.Harold MulderMiller 211 AutosetHTP 201 Invertig with water coolerHardinge Cataract Quick Change Lathe
Reply:I've worked on a couple of jobs where we had to come in and deal with these sorts of issues, but on a much smaller scale. We had to work with 5/8"-3/4"  bolts not 2". On one job the engineer had us get a heavy steel plate fabed with tapered holes, and then it was laid over the bolts and the bolts welded to the plate and ground flush. The column was then welded to the base plate that was installed. I can't remember any more info than that from 10+ years back.The other job they never set the bolts at all. We talked with the engineer and Hilti and used an epoxy Hilti makes to set the bolts in holes we had to drill and clean.I doubt this helps much, but it might give you a few other ideas you may not have thought of. Good luck..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:1020 is a readily weldable grade.  However, depending on stud engagement, they may very well be unable to use the necessary threaded area.  If they're a good bit short, then a mechanical coupler may be a possibility.  On all of the jobs I've been on, they'd all be getting pulled out and the correct ones epoxied in...
Reply:I would think that welding on them would change the composition and make them brittle so that they would be prone to breaking. I think supe has the right idea, epoxy is a suitable solution.UA Local 598
Reply:Hmmm, a 2 inch diameter bolt is a pretty big chunk of bolt.  That means that this construction project is a pretty big one.Which means that there is probably an engineer around on the project somewhere.  Have him/her figure it out.    Including all the applicable construction and fabrication and material and building codes.Yes, 1020 plain steel is weldable.  But an anchor bolt made of 1020 that is embedded in concrete may not be weldable because the interaction of the heat of preheat, postheat, and welding on the steel AND the concrete may make the 'system' unweldable even though one steel component might have been weldable by itself.I'm thinking it's going to be remove-n-replace though.  The best laid schemes ... Gang oft agley ...
Reply:I agree with Moonrise. 2' bolts!! This is no small construction job sounds more like a high rise building. I would never dream of welding an extension onto those bolts without first contacting the building inspector to see what you options are.Co-Own CNC shop:Miller :1251 plasma cutter, MaxStar 700 TIG/Stick, & XMT 456 Multiprocess Welder.&  2 Hypertherm HPR260's Plasma CutterSorry I had a bad stroke but now I am back.
Reply:Not to mention the fact that you can have those excavated and replaced in considerably less time than you can have a WPS/PQR run...