A needed bridge

Discussion in 'Robin At His Best' started by Matthyro, Jun 18, 2004.

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  1. Matthyro

    Matthyro Will always be re-membered

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    There is a 32 inch gap in the canyon section of my layout. Been thinking about how I will build it.
    First is a photo of the gap

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  2. Matthyro

    Matthyro Will always be re-membered

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    Next I drew this sketch to see how it may look. A draftsman I am not.

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  3. Matthyro

    Matthyro Will always be re-membered

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    Thanks for all the responses and ideas folks. I do have the book and get ideas from the Diablo Canyon Bridge. As Bill says, this is N scale and it will be built out of a combination of corrugated cardboard and cereal board. You are right Errol in that only the abutments will be fixed in place before the scenery is done. The bridge itself will then be installed.
    The main beams are made of corrugated cardboard with a combination of with grain and cross grain. Here is the first step of cut pieces.

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  4. Matthyro

    Matthyro Will always be re-membered

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    Next comes laminating the pieces.

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  5. Matthyro

    Matthyro Will always be re-membered

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    Cross sections added

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  6. Matthyro

    Matthyro Will always be re-membered

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    The two main beams joined

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  7. Matthyro

    Matthyro Will always be re-membered

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    Clark, the first thing is to have a very sharp cutting knife. I use one that has the break off sections of the blade. Make the first cut lightley, and take about 4 or 5 cuts a little harder each time then the corrugations don't crush or twist
  8. Matthyro

    Matthyro Will always be re-membered

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    Next I cut 3/16th inch strips of cerealboard and 1/8th inch cross grain corrugated cardboard. This is to make up some steel girders.

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  9. Matthyro

    Matthyro Will always be re-membered

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    I glued two of the crealboard strips to a corrugated strip to make up a girder.
    Here are a bunch ready to be used on the bridge.

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  10. Matthyro

    Matthyro Will always be re-membered

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    Does your steel ruler have a cork back to it Dick? Mine does and doesn't slip
  11. Matthyro

    Matthyro Will always be re-membered

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    The LPBs have been busy welding girders to the bridge frame.
    Next will come cross connecters and such.
    One huge benefit to us model railroaders is that we can build a bridge like this, up-side down.

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  12. Matthyro

    Matthyro Will always be re-membered

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    Clark, I used some white glue that has been around a while and it is a bit thick. Only had to hold the girders in place a few seconds then they stayed where I put them.
  13. Matthyro

    Matthyro Will always be re-membered

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    Here I have started adding some cross beams and bracing.

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  14. Matthyro

    Matthyro Will always be re-membered

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    I don't know if I will add rivets Arl. Do you know a way of doing them?
  15. Matthyro

    Matthyro Will always be re-membered

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    Thanks Arl . I will try it
  16. Matthyro

    Matthyro Will always be re-membered

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    Thanks very much for you kind words folks.
    One of the benefits of N scale is that details are so small that they are almost invisible so it is quite OK to leave them out and as Shaygets says, one doesn't miss them.
    Here is the structure complete ready for painting.

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  17. Matthyro

    Matthyro Will always be re-membered

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    OK you two Ron's I gave it a spray coat of grey primer and it has been turned over finally.

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  18. Matthyro

    Matthyro Will always be re-membered

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    No warping at all so next coat was red oxide primer.

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  19. Matthyro

    Matthyro Will always be re-membered

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    Last I sprayed it with flat black. Just a light coat so some of the red still shows through.
    Here it is jerry rigged in place. Bridge abutments and scenery to be added before it is fixed in place.

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  20. Matthyro

    Matthyro Will always be re-membered

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    Thanks very much folks. These projects are a lot of fun to build.
    shaygetz it is a single track bridge
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