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  • Container strength questions

    Discussion in 'The main mechanical design forum' started by cratetech, Feb 3, 2011.

    1. cratetech

      cratetech Member

      Feb 2011
      Likes Received:
      I am currently designing a 40 ft container that will need to be cut in 2 pieces on the width. this will leave 2- 20 ft x 10 ft pieces. I would like some advice on how to connect the 2 halves in the middle. here are some rough specs on the base design. we are more concerned on the base as it will be folding at the top.

      base is 2 x 8 3/8 wall structural steel
      2x4 cross bracing. spaced every 20"
      4x6x3/8 structural steel fork tubes going through both 2x8's. centered vertically on the 2x8's and centered horizontally on the 40' length. fork tube spacing is 42" on center.

      Aside from that we really are stuck on the design ideas for the connecting the 2 halves together.

      Thanks in advance to all the ideas I hope we get.

    3. AndrewNew

      AndrewNew Well-Known Member

      Jul 2010
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      You could use a flange joint, a spigot and sleeve or any number of possible "tube and socket" joints. Do you have any other constraints? How easy will it be to bring the two halves into accurate position? What loads will the container be carrying? Do you have a sketch?


    4. hmck57

      hmck57 Member

      Feb 2010
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      Does the split have to be separable in service, or is it attached back together permanently? When you say "it will be folding at the top", do you mean it is hinged there? Do you have some sketches or models you could share? Ultimately the loads will dictate what the joint looks like.

      If it needs to be separable during use, then a flange idea might work. You could use large plates (flanges) on the sides that butt up when the two halves are brought together, and a splice plate for the floor.

      If it is only separable during assembly, then this would be like the joint in aircraft fuselage sections, which are joined at a bulkhead (think big frame). The wall panels should be attached to this frame all along their width. The major frame members running the length of the container should have some kind of splice across the joint.

      Hope this helps...

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