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  1. #1
    Join Date
    Feb 2007
    Posts
    26

    Default Want To Build a Dump Bed Trailer

    Fellow welders

    I recently bought a dump bed that came off a 1 ton pickup. It is 6 feet wide and 8 feet long, inside dimensions, with a 42 inch high headache rack on the front. Full control tailgate. My plan is to build a trailer frame under it.

    Iím from Dayton Ohio, which has a number of General Motors plants, and their local scrap yards are flourishing.

    One yard in particular gets loads of truck frame rail ďrejectsĒ on a regular basis from the truck plant. These rails are 5/16 and 3/8 thick formed into U-Channels 8 or 10 inches wide and 3 inches deep, about 30 feet long. They have right and left sides. Both sides have a 3 inch dog-leg offset (call it a zig-zag. Uhhh, Not the ZZ that you smoke with) that runs about 4 feet, then 8 feet to the end. There are the usual holes for rivets all over them.

    Anyway, I plan to get some of it and make/mount a frame on a couple of 7000 pound axles to carry the dump bed. Iíll be using a 12 volt hydraulic pump to run the cylinders to raise the bed. The scissors lift under the bed already has 2 2-inch single acting cylinders on it, simplifies what I have to build. The lift ďslidesĒ the bed up. It is not pinned to the bed and I think I will leave it that way. Iíve looked around the net and have a general idea what Iím going to build but Iím open to some ideas for my build. Iíd like either some pics or drawings, hopefully with some dimensions for my project. I also plan to go to a rental place like NationsRent and look over their trailers.

    Iíve been looking at SurplusCenter.com for pumps. Found a couple that look like what I need without extra valves or hoses and fittings.

    I plan to have enough frame in front of the bed so I can mount a full size cross-bed tool box on it (also available from these scrap yards. Some real good alum diamond plate boxes show up for under $50). I might put the battery and pump in the box to protect from weather and pilferage.

    I have looked at Gary Davisí welding trailer posted either here or on the Hobart board a couple years ago and got some good ideas from it.

    RoGrrr
    Glenford Ohio

  2. #2
    Join Date
    Jan 2008
    Location
    East Central Wisconsin
    Posts
    12

    Default

    Good luck with that project, sounds like it will be a fun challenge. I would look online at diffrent trailer manufacures and see if they list what they have for frame material , box tubing or c channel.

    Good luck
    Beefie

  3. #3
    Join Date
    Mar 2006
    Location
    Ocean City, Maryland
    Posts
    951

    Default

    Repaired lots of dump trailers and 6"x 5/16" channel seems to be real common for frame rails. I guess you got a good deal on your material because most times its cheaper to buy one built already. I just bought a equipment trailer after pricing it out, labor and material. It was cheaper to buy one and so far its been great. I also built a dump trailer about 10 yrs ago and after 2-3 modifications it works fine. But not sure i'd do it again.
    Scott
    HMW [Heavy Metal welding]

  4. #4
    Join Date
    Feb 2007
    Posts
    26

    Default

    Hi HMW

    Well, I figured that for about a grand I will have my materials to build it. However, if my time were worth 25 cents an hour, I would make out all right on it.

    However, they call this stuff hobby, so I will have fun with it and end up calculating my time out to be around ten cents an hour.

    Lessee, The truck rails will cost under $150 each (I might be able to get by with one but I'll prolly have to buy two) and I already have the axles and tires. The bed cost me $400 and I need the pump - another $400.

    Well, I guess I'll need a receiver and a jack and some lights.

    Hmmmm

    Well, by the time I get done, maybe I'll have well over TWO THOUSAND wrapped up in it.

    Go back and re read my words - hobby Hobby HOBBY

    Uhhh, good thing I'm not married. That being said, looks like I'll have to go down and draw me another draft beer. Shame the woman caint do that fuh me.

    RoGrrr

    Y'All have a good weekend

    Pizza and beer for me RIGHT NOW !


    Quote Originally Posted by HMW View Post
    Repaired lots of dump trailers and 6"x 5/16" channel seems to be real common for frame rails. I guess you got a good deal on your material because most times its cheaper to buy one built already. I just bought a equipment trailer after pricing it out, labor and material. It was cheaper to buy one and so far its been great. I also built a dump trailer about 10 yrs ago and after 2-3 modifications it works fine. But not sure i'd do it again.

  5. #5
    Join Date
    Aug 2006
    Location
    near rochester NY
    Posts
    9,881

    Default

    sounds like fun, be shore to post lots of pic's.
    thanks for the help
    ......or..........
    hope i helped

    feel free to shoot me an e-mail direct i have time to chat. james@newyorkmetalart.com
    summer is here, plant a tree. if you don't have space or time to plant one sponsor some one else to plant one for you. a tree is an investment in our planet, help it out.
    JAMES

  6. #6
    Join Date
    Nov 2007
    Location
    Saskatoon, Sask, Canada
    Posts
    1,270

    Default

    Quote Originally Posted by RoGrrr View Post
    I plan to have enough frame in front of the bed so I can mount a full size cross-bed tool box on it (also available from these scrap yards. Some real good alum diamond plate boxes show up for under $50). I might put the battery and pump in the box to protect from weather and pilferage.
    Excellent idea, I built a battery box for a buddies trailer out of 1/8" Alum. checkerplate and also surprised him with a matching winch cover! Now I get to use the trailer when needed as long as it's available and the battery is always there!!!
    Note: be sure to put a vent in the box if you do mount the battery in it, I just cut a hole and installed a pre-made round Alum. vent.
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  7. #7
    Join Date
    Feb 2007
    Posts
    26

    Default

    Mr Wagner

    Thanks for suggesting the vent. I will do that.

    The box will be a full size cross bed box so I can put tools and chains and the like in it. Maybe even a chainsaw. I guess I would have to vent the battery directly out of the box so the acid fumes don't rust everything in the box. Guess I could use a sealed marine-type battery box inside the tool box and vent that.


    What I'm looking for in the thread is some good data for building the frame. I have never built a trailer, let alone something as heavy as a dump trailer.

    So if anyone has any ideas for me, let me know

    Roger

    Quote Originally Posted by c wagner View Post
    Excellent idea, I built a battery box for a buddies trailer out of 1/8" Alum. checkerplate and also surprised him with a matching winch cover! Now I get to use the trailer when needed as long as it's available and the battery is always there!!!
    Note: be sure to put a vent in the box if you do mount the battery in it, I just cut a hole and installed a pre-made round Alum. vent.

  8. #8
    Join Date
    Jan 2008
    Location
    East Central Wisconsin
    Posts
    12

    Wink

    If you have never built a trailer at all you might want to go to www.trailerplans.com or northern tool.com they both have plans that you can buy online. trailerplans .com is the least expensive of the two sights. Or you can look online and see if different trailer mfg's have a list of what material they use for there frames. There is some books out there that help you design a trailer, I have purchased "Trailers how to design & build" volume's 1 & 2 , written buy M.M.Smith. The books have a ton of good info in them.

    Have you desided how much weight you plan to carry , or if you want a single or tandem axle. Those ? should be ansered first and then build a game plan from there.

    Good luck and have fun with it
    Beefie

  9. #9
    Join Date
    Feb 2007
    Posts
    6

    Default

    Beefie
    Thanks for the leads on the books.

    I checked out Smith's books from the library and found the veritable wealth of information you said.

    There are things in the books that I hadn't thought about so it was well worth the effort to check them out.

    I also checked out WELDING, FABRICATION and REPAIR by Frank Marlow. It's about 350 pages and I might just go out and buy it. Gives lots of tips that are great. I've been in the (hobby) shop and garage all my life and I still learned a lot from it.

    Roger


    Quote Originally Posted by Beefie View Post
    If you have never built a trailer at all you might want to go to www.trailerplans.com or northern tool.com they both have plans that you can buy online. trailerplans .com is the least expensive of the two sights. Or you can look online and see if different trailer mfg's have a list of what material they use for there frames. There is some books out there that help you design a trailer, I have purchased "Trailers how to design & build" volume's 1 & 2 , written buy M.M.Smith. The books have a ton of good info in them.

    <SNIP>
    Beefie

  10. #10
    Join Date
    Jul 2007
    Location
    Lancaster, Pa
    Posts
    431

    Default

    RoGrr, if you have a local truck body shop, check them out as well as looking at other trailers. Check with your local road department to see where they get their trucks. These truck body shops build the dump beds for a living along with designing the hydraulic system. If they are like some in Pa, they will help you out with a smile and give you literature on how much pump you need, pressure, etc. There are so many options.
    Ken

    What else is there besides welding and riding. Besides that

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