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Bad Engineering? Ut oh!!!!

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  • Bad Engineering? Ut oh!!!!

    Well I am making a trailer for a 250 gallon smoker. The smoker weighs 500 empty. The fire box will probably weigh 300. The shelves....ect....Im thinking 1000#'s total max. The trailer is going to be 4'x10'. I cut some 2x2x1/8 steel square tubing for the bottom frame today. Im afraid that it might not be stong enough. I cant waste the material, its paid for and cut to size allready. I need help in assuring its strong enough. Sure Ill be running 2x2x1/8" cross brasses, and maybe some gussets tying the frame to them, and gusseting each inside corner of the frame, but what else can I do. Please help!!!!!!! Am I worrying for nothing? suggestions needed, and not telling me to buy more material please.........thank you!
    Last edited by westpoint; 01-14-2013, 08:00 PM.

  • #2
    Number one, I think you are overestimating the weight of the smoker, your numbers sound pretty high to me, so do an actual weight calc. If you need help figuring it post that up as well. Number two, post up a pic of the smoker, as well as how it mounts to a trailer. If the smoker is 10' long and 3' high its needs are going to be a lot different than if it is 3' wide and 10' high. I don't know what you have made, so you'll need to make it more clear before I could give you my opinion.

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    • #3
      Thank you!

      Originally posted by walker View Post
      Number one, I think you are overestimating the weight of the smoker, your numbers sound pretty high to me, so do an actual weight calc. If you need help figuring it post that up as well. Number two, post up a pic of the smoker, as well as how it mounts to a trailer. If the smoker is 10' long and 3' high its needs are going to be a lot different than if it is 3' wide and 10' high. I don't know what you have made, so you'll need to make it more clear before I could give you my opinion.

      thats just it, I havnt built it yet. I am going for something like this...http://www.smokymtbarbecue.com/store...l#.UPTRSRwgDD8

      The tank is 3" wide and high, and about 84" long. Trailers ganna be 4' x 10" without toungue. Right now the tanks 480#'s empty, i need to build fire box and warmer, plus all the shelving and smoke stack. The reason I havnt buit it yet is i need the trailer to move it around while im building it.

      I figure besides running cross members, and gusseting every corner with plate, when I make the toungue I can use some 3x2 tubing and have it come back to the trailer and travel under the sides to about the axle. That should help some. Im just worried.

      I did find a good thread on reinforcing a 2x2x1/8" trailer about my size......should be ok right?
      http://www.pirate4x4.com/forum/tow-r...y-trailer.html
      Last edited by westpoint; 01-14-2013, 09:06 PM.

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      • #4
        55 views one response? anyone have a opinion, or advice?

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        • #5
          tonque and axle....

          Weight u will be at, i would not work much. I would be sure to put the correct axle, more important dont ovrer spring it. Most small trailers fail because the springs are way to stiff or people crank the spring bolts so tight that the spring cant bend. Trailer then beats itself apart. Also dont skimp on running the tonque the length of the trailer.
          Kevin

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          • #6
            sorry meant to say worry not work...

            Sorry meant to worry not work

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            • #7
              Bad Engineering? Ut oh!!!!

              You could use the tank as part of the structural integrity of the trailer similar to a unibody car.

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              • #8
                the axles a torsion 3500#. well since noone said its ganna fall apary i guess its ok.

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                • #9
                  You need to post the design for people to comment on the design. Pencil and paper sketch would be just fine

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                  • #10
                    Check out this site. It may or may not provide some peace of mind.


                    http://webstructural.com/how-to/steel-beam/

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                    • #11
                      How much welding experience do you have? Have you ever built a trailer for over the road? What type of welding machine are you going to use? Are you capable of making code quality welds or is this a learning experience for you?
                      Sorry for the third degree with all the questions, but someone needs to ask since you are new here. This might help get some of your questions answered.

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                      • #12
                        Originally posted by Bistineau View Post
                        How much welding experience do you have? Have you ever built a trailer for over the road? What type of welding machine are you going to use? Are you capable of making code quality welds or is this a learning experience for you?
                        Sorry for the third degree with all the questions, but someone needs to ask since you are new here. This might help get some of your questions answered.

                        I have been welding for 15 years. structural mig tig stick......all metals. the welding the easy part. I am feeling more confident since I will be running the tounge down the sides of most of the trailer.

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                        • #13
                          Those materials most likely will work. I would go with the 2x3 on the tongue for sure. One possible issue is the thin wall tube. It's probably going to rust from inside and there isn't much there. That will lead to failure at the joints eventually. It's better to get C-channel for the frame with a thicker web. That makes it easier to prevent rust and less likely to have a "tear".

                          If you are planning cross country trips I would get some stronger materials and save the tube for another project.

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