Dump truck dump floor ???

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I was approached to weld in a new floor on a one ton dump truck. I was planning on going right over the existing floor. Should this be welded solid  or one inch welds say every six inches? Also how thick should the metal be?
Reply:You will want a full weld to keep dirt or whatever from getting in between the seam.Your best bet would be to cut out the old floor, because getting it to lay flat will be very difficult. Also you will want to attach it to the cross members. As for thickness ,what is in it now? When cutting out the floor you could leave a small lip for the new floor to sit on.
Reply:I agree with M J D that the ideal way is to remove the old floor, then go back with new.  Depending on intended use and the customer's finances this is not always possible.  If your customer wants you to plate the old floor, you're going to want to mark the crossmember locations on the top side of the new floor once it's tacked in, then gouge through the new floor AND old floor, down to the crossmember and plug weld directly to it.  I usually use a 4.5" grinding wheel for this as it leaves a perfect-sized area for a good plug weld.  You're going to want a decent number of plug welds, although not all of them need to go right to the crossmembers unless the original floor is paper-thin or its welds are broken loose on the underside.Agree with full-welding the floor.  You don't say the reason for floor replacement, whether because of rust/wear holes or because it's been wallowed out by too many heavy rocks being dumped into it.  If you're leaving the original floor and not 100 percent full-welding it for whatever reason, punch decent-sized drain holes in the original floor in every low spot so you don't get water buildup in there.On a 1-ton truck weight is a real enemy, made even worse if you're plating instead of replacing the floor.  Depending on what the truck was originally spec'd for, the original floor was probably something around 1/8" (10 or 11 gauge) thickness.  Possibly as heavy as 3/16", but that's unusual.  You can pretty closely guess the original floor's weight with some steel charts listing lbs/sq ft, subtract a certain amount for wear, then use the same charts to figure out what the new floor will weigh / add.  The needed thickness will depend on what your customer hauls and how much of a payload reduction he's willing to bear in exchange for floor strength.
Reply:If it'll be exposed to road salt the old floor will trap snot and rust out the new in no time. You'll want a number of spots in the middle welded too, that will be hard with two layers.An optimist is usually wrong, and when the unexpected happens is unprepared. A pessimist is usually right, when wrong, is delighted, and well prepared.
Reply:Never seen a dump truck of that size done with a liner because of weight factors as T Bone pointed out ...done a few scrapers that way ...3/16 AR400 if i remember correctlyBacked my CATMA over your CARMA oops clusmy me  What would SATAN do ?? Miller Trailblazer 302 AirPakMiller Digital Elite  Optrel Welding HatArcair K4000Suitcase 12RC / 12 VSHypertherm PM-45Rage 3 sawRusty old Truck
Reply:approx. 8x8 10ga floor gonna weigh 358lbs.  Probably what it was in the first place.3/16 will bump you up to 486lbs.Plating is a lousy way to go.  Removal is best.Small cutting tip, and a scarfing tip, are all you need to remove the old floor.  Nothing fancy needed."Any day above ground is a good day"http://www.farmersamm.com/
Reply:Originally Posted by farmersammapprox. 8x8 10ga floor gonna weigh 358lbs.  Probably what it was in the first place.3/16 will bump you up to 486lbs.Plating is a lousy way to go.  Removal is best.Small cutting tip, and a scarfing tip, are all you need to remove the old floor.  Nothing fancy needed.
Reply:Originally Posted by Willie BWhat's a scarfing tip?
Reply:Originally Posted by Willie BWhat's a scarfing tip?
Reply:Originally Posted by DSWDon't wrap the scarf too tight around your neck or it will cut off  your air or the blood supply to your brain.
Reply:Ive done this job a few times. Usually prop the bed up and cut the old welds out with either oa or plasma. Shouldnt take more than couple hours --Gol'
Reply:Plating is easiest.  Using 1/8 will not last long if they are doing any concrete work.  Our general rule of thumb is 3/16 minimum for concrete, prefer AR400.  And yes, welding needs to be complete.  We do two halves, bent to match original bed, then overlap them down the center so you really only have three full length welds.
Reply:Like this...............only smaller Attached Images6 Miller Big Blue 600 Air Paks2 Miller 400D6 Lincoln LN-25's4 Miller Xtreme 12VS2 Miller Dimension 812 4 Climax BW-3000Z bore welders Hypertherm 65 and 85Bug-O Track BugPair of Welpers
Reply:Expat,Hey, I've seen those clad tail board sections before.   Last edited by HT2-4956; 05-01-2015 at 07:06 AM.
Reply:Where's that pic taken..............looks awful familiar.........Northern Nevada?6 Miller Big Blue 600 Air Paks2 Miller 400D6 Lincoln LN-25's4 Miller Xtreme 12VS2 Miller Dimension 812 4 Climax BW-3000Z bore welders Hypertherm 65 and 85Bug-O Track BugPair of Welpers
Reply:Originally Posted by ExpatWelderWhere's that pic taken..............looks awful familiar.........Northern Nevada?
Reply:Originally Posted by HT2-4956Right out side Ely at the Robinson Mine.
Reply:Originally Posted by Go1lumIve done this job a few times. Usually prop the bed up and cut the old welds out with either oa or plasma. Shouldnt take more than couple hours
Reply:3/16" would be fine for a 1 ton.
Reply:Originally Posted by ExpatWelderMy home town.............I was born in Elythat chrome looks awfully familiar as well...........SA1750CR??............owner of company is a good friend.................rahtreelimbs-no hijack intended.
Reply:Your pics are dated 2007...............are you still working there?6 Miller Big Blue 600 Air Paks2 Miller 400D6 Lincoln LN-25's4 Miller Xtreme 12VS2 Miller Dimension 812 4 Climax BW-3000Z bore welders Hypertherm 65 and 85Bug-O Track BugPair of Welpers
Reply:We've been doing about 1 785 package per month.............I only have 9 guys maintaining 20 trucks, 4 shovels, 6 drills, 5 D10's, 3 992's and 3 14 M's............so it takes a while to hang a liner package.  We're getting to about 20,000 hours on the first batch of trucks so the factory packages are getting pretty much ran out..........job security.6 Miller Big Blue 600 Air Paks2 Miller 400D6 Lincoln LN-25's4 Miller Xtreme 12VS2 Miller Dimension 812 4 Climax BW-3000Z bore welders Hypertherm 65 and 85Bug-O Track BugPair of Welpers