Concrete Arch Bridge... Help.

Discussion in 'FAQs' started by marty w., Aug 25, 2002.

  1. marty w.

    marty w. Member

    Hi all,
    I have been messing around with the design of a concrete arch bridge for about 5 weeks. Any books I have found about bridges have very lightly touch on the subject and with few pic's.
    Anyway , I took my idea's and built this bridge, see attached.
    It's not done, it still needs concrete form marks, painting and maybe a handrail.
    Well tell me the truth, don't hold back, want do you think?
    Does it look right?
    Anything missing?
    Thanks for you help.

    Attached Files:

  2. marty w.

    marty w. Member

    OH.... It will span a river and that's a 40' boxcar for size ref.
  3. Edavillenut

    Edavillenut Member

    looks good to me. just gave me an idea for my layout. the big Pink foam river bridge has been in place of where i want to put a bridge, but cant find one i like.
  4. Tyson Rayles

    Tyson Rayles Active Member

    Other than the river is missing it looks great to me! :D :cool: :D
  5. Drew1125

    Drew1125 Active Member

    That's a classic design, & a very nice piece of workmanship, Marty! :cool:
    How did you make it?
    Wood? Plaster? Is it a trimmed down tunnel portal?
    Now all you need is some water, & scenery, & that will be an oustanding scene!
  6. alkcnw

    alkcnw Member

    The only thing I see missing are a few cracks!:eek:
  7. Vic

    Vic Active Member

    Looks like a winner to me:) :) Simple and classic.
  8. marty w.

    marty w. Member

    Thanks for the remarks. I'll finish it without changing the design. Yeah, I'll add some cracks.

    Charlie- I made it out of styrene, .060" and .080" sheet. I thought it would be faster than building a mold for plaster. I used a ellipse shaped dish for a pattern for the arch.

    Thanks guy's.
  9. t. alexander

    t. alexander Member

    Marty, the bridge looks great.
    I know your frustration in finding good "how'd they build that" info. I myself am suprised at the lack of information on the internet.
    I have a book called The American Railway, in it is a chapter dedicated to bridges and another to engineering feats. It was first printed in 1889 I believe and has good illustrations of bridges under construction.

  10. t. alexander

    t. alexander Member

    Marty, looking at the bridge again, I wonder if adding another piece of styrene to the face of the arch area where the keystone blocks would be on a stone arch might help give it "definition" if that makes sense.

  11. Gary Pfeil

    Gary Pfeil Active Member

    That's a fine looking bridge Marty. An Erie berk will look nice going over it. Good job.

  12. Matt Probst

    Matt Probst Member

    Excellent job Marty. Can't wait to see the finished, detailed end result!!

    Matt--Hershey, Pa.
  13. shamus

    shamus Registered Member

    Marty, thats a hell of a nice bridge, I can just picture the river wandering through it, make a nice photo for photo contests later on.

  14. marty w.

    marty w. Member

    t. alexander,
    I know what you mean about the "keystone" arch area.
    I have been considering adding that. It would add character to the bridge.
    That's why I posted this, to get idea's.
    Shamus - You are right, hope to have this area done by contest time.
    Thanks again to all,
  15. rockislandmike

    rockislandmike Active Member

    I even checked my Model Railroading "Bridges & Trestles" book, and yep, you're right, only passing thoughts on the arched bridges. I was at one point gonna construct a viaduct, and same - I had to search around the inet for photos of same before I started coming up with plans.
  16. marty w.

    marty w. Member

    Checkout the "Bridge and Trestle Handbook" by Paul Mallery.
    This book has more details on viaducts and arch bridges.
    Not many pic's. but helpful info on design.
  17. spitfire

    spitfire Active Member

    Real nice job. Only thing I'd add would be some kind of railing.

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