Welding a 190'-0' Box Girder (No Camber)

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Hi Guys-Need some advice on a welding sequence for a STRAIGHT 190'-0" box girder.-  30" x .5" top and bottom flange -  44" x .25" webs (left and right)-  .25" interior stiffeners (baffles) spaced at 10'-0",  fillet welded to the bottom flange and both              webs-   Single bevel corner joints with .375" x .375" backer bars at all four corners.-   Web and Flange splices every 20'-0' staggered @  2'-0" to avoid a stress riser.-   Design and Welding in accordance with AWS D14.1 Crane Welding CodeTrying to minimize heat distortion. Any help would be appreciated.Thanks-Launce
Reply:Paying a welding engineer is worth every penny on something that major. If it is too expensive, the bid was too low. Just my 2 cents. Sent from my BlackBerry 9650 using TapatalkCERTIFICATIONS:7018M- H.V.O10718M- H.V.O11018M- H.V.O9N10- H.V.O71T-1-HYM- H.O.V100S1 PULSE ARC 0,035- H.O.V100S1 PULSE ARC 0.045- H.O.VER70S-3 PULSE ARC 0.035 H.O.VER70S-3 PULSE ARC 0.045 H.O.VER5554- H.O.V
Reply:Originally Posted by NHMattPaying a welding engineer is worth every penny on something that major. If it is too expensive, the bid was too low. Just my 2 cents. Sent from my BlackBerry 9650 using Tapatalk
Reply:Hey Mad bat....I think you know the answer and you are just toying with us.Classic 1D 200SAE 30086 SA 200Hyperthem 45Jancy Mag Force O/A Victor-GossCable's remote2-12" Mathey Dearman bevelersLN 25Miller Auto Set 211Wendy's Pancake/Jackson PipelinerNew Holland LS 180Great story man....tell it again!
Reply:Use a harbor frieght 110 unit it will minimize heat and distortion.  Just kidding you need to have a architecte look over that and sign off just for the liability behind something of that magitutde.Vantage 300 kubota ,miller 304 xmt ,lincoln ln 25 pro , ranger 305 G, plenty of other tools of the trade to make the sparks fly.
Reply:We have approved drawings and a plan. I just wanted to see if anyone had some tips we didn't think of.
Reply:well post them and you might get proper feed backMiller Xmt 350Lincoln Ln-25Ahp 200xSmith Gas Mixer AR/HTig is my Kung FuThrowing down dimes and weaving aboutInstagram http://instagram.com/[email protected]
Reply:Sounds like a typical box section.  The longest I set up was about 60 feet long.  We tacked it up then set in on horses level.  One welder on each side went down the length back stitching in five to ten foot jumps.  It was then turned over and the opposite two fillets were done.  For something like 190 feet there should be some documentation.  An automatic process might be best for this .....  Two tractors travelling down opposite sides.  Even with automatic I would still back step.
Reply:Launce has many years inspecting box girders, but nothing this thin. Take some pictures for us!Classic 1D 200SAE 30086 SA 200Hyperthem 45Jancy Mag Force O/A Victor-GossCable's remote2-12" Mathey Dearman bevelersLN 25Miller Auto Set 211Wendy's Pancake/Jackson PipelinerNew Holland LS 180Great story man....tell it again!
Reply:Originally Posted by lotechmanSounds like a typical box section.  The longest I set up was about 60 feet long.  We tacked it up then set in on horses level.  One welder on each side went down the length back stitching in five to ten foot jumps.  It was then turned over and the opposite two fillets were done.  For something like 190 feet there should be some documentation.  An automatic process might be best for this .....  Two tractors travelling down opposite sides.  Even with automatic I would still back step.
Reply:I would use SAW if at all possible with 3/32 wire.  If pressed for an alternative, I would recommend 0.052" or 1/16" flux core.  I like the idea of the 10 ft back steps, but I would also consider staggering the back steps so that both welders are not working on the same section at the same time, but rather are 10 ft offset.Are you running this 3 shifts?  What is the material A572-50?
Reply:Interesting that you asked about 572-50... last week a small job with that material slipped to the floor without my review and the eng didn't know to specify preheat. Cracks all over. The customer on this project is cutting cost by using a36 and forgoing ndt on the cpj welds. Im going to talk them into MT at a min.
Reply:Well.. the.job is done and shipped. I posted a link to the pics on the "projects" forum. Check it out
Reply:Originally Posted by lotechmanSounds like a typical box section.  The longest I set up was about 60 feet long.  We tacked it up then set in on horses level.  One welder on each side went down the length back stitching in five to ten foot jumps.  It was then turned over and the opposite two fillets were done.  For something like 190 feet there should be some documentation.  An automatic process might be best for this .....  Two tractors travelling down opposite sides.  Even with automatic I would still back step.