load limits / capacity on flatbed trailers?

Discussion in 'Flatbed Trucking Forum' started by alfio, Apr 2, 2024.

  1. alfio

    alfio Bobtail Member

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    Hello all,

    I'm wanting to use an older flatbed trailer to use as a bridge for crossing a small creek that goes through our place. The span is 22 ft or so max which means I can prob cut the trailer in half and have a nice wide crossing.

    I want to get the heaviest duty frame / deck combo I can afford. Ideally, once I place, I will be able to drive a loaded tandem dump over to the other side to spread gravel/continue building the driveway up (that is approx 45K lbs when loaded). Those of you familiar with flatbed loads, is this a reasonable expectation or crazy town to try something like this?

    There's not a lot in the budget for this so I want to be careful in what I'm buying. Any advice? Thanks all
     
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  3. xsetra

    xsetra Road Train Member

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    I've sold a couple flatbed for bridges.
    One, I transported a mobile home over.

    No problem with the main beams, not sure about the your deck carrying the weight.

    How close are the cross members? What kind of deck? Wood, aluminum, steel?
     
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  4. alfio

    alfio Bobtail Member

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    All good questions. I'm seeing that the steel trailers with wooden decking are the most affordable. I'm looking around and seeing different options, not sure what configuration would give me the best options as far as the decking.
     
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  5. REO6205

    REO6205 Road Train Member

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    Ever think about an old railroad flat-car? Longer, wider, built heavier. We use them for bridges in the woods. They'll last.
     
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  6. Willy Wonty

    Willy Wonty Light Load Member

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    That's a good idea!
     
    alfio Thanks this.
  7. W923

    W923 Road Train Member

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    Just for reference 2” thick oak decking with supports 2’ on center will hold around 12k pounds on a 12 inch wide tire at around 15-18k it gets a little sketchy. Not a scientific study but seems pretty reliable from what happens to the floor of my rgn.
    The main beam of the trailer will be fine especially considering you cut the span down considerably. Cross members idk just depends on what they are. Generally I wouldn’t expect a problem.
    I like the rail car idea but it would probably be much cheaper and easier to use the flatbed trailer
     
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  8. alfio

    alfio Bobtail Member

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    Thought about it but I don't have anything heavy duty enough to bring it here or move it around when it gets here. Also they are $! At least the ones I can see that are reasonably close. Good option though.

    A
     
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  9. alfio

    alfio Bobtail Member

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    That's super helpful. I'm thinking that if I go this route, I can split the trailer in half (length wise), cut off the supports on the two "middle" sections and will be able to set it up so that the two sections of main beams will be (roughly) at the track width of my dump truck so most of the weight will be over the strongest part of the trailer sections.

    A
     
  10. LTLTRUCKDRIVER

    LTLTRUCKDRIVER Light Load Member

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    A fence company here in South Texas uses old container chassis to make farm / ranch bridges don't know what they use for decking, the owner of company said they were cheaper than old flatbeds.
     
    W923 Thanks this.
  11. W923

    W923 Road Train Member

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    Just make sure there’s enough support from the ground at the ends so it doesn’t sluff off and dump your bridge in the creek
     
    Ruthless Thanks this.
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