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Thread: Scratch built Trestle question...

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    Default Scratch built Trestle question...

    In a nutshell, what size/dimension "Bass Wood" should be used or recommended to build a Trestle Bridge?
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    Hi Tony,

    A lot of the guys in our club use bamboo skewers for the pilings.

    1/32 x 3/32 for the 4"x12" wood bracing.

    If you haven't done so, consider building a jig to keep the parts in alignment during gluing.
    Happy Modeling

    Bruce

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    Thanks Bruce, using bamboo skewers is a good idea. I was thinking about square pylons but round could also work In the event I do go with square pylons, I am guessing that 3/32 Bass Wood would work.

    A fair while back I bought a Trestle Kit that came with a Jig for N Scale Trestles - I still have that around here somewhere. If not, having a jig is a necessity and will make one.
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    Long time ago I built a trestle and made my own jig for it, but it’s probably long gone. I will be building a trestle for my micro layout so look forward to your progress as well.
    ~ Charles

    :shay:

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    3/32 square should do fine for the upright parts too if you'd rather square. That's 15 inches in N.

    Easy rule of thumb for estimating stuff like that is to remember 1/16" is 10 inches in N scale.
    "Do Not Hump!?!?! Does that mean what I think it means?!?"--Michelle Blanchard

    "People saw wood and say nothing, but railroad men saw trains and say things that are better left unprinted."--Charles De Lano Hine

    Down with UP

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    Quote Originally Posted by ranulf View Post
    Easy rule of thumb for estimating stuff like that is to remember 1/16" is 10 inches in N scale.
    And to take it a bit further...
    1/16 = 1.5mm = 10 inches in N scale
    Cheers,

    Russ

    CEO of Devil's Gate Mining Co.



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    @wombat457, not sure what decade you are modelling or how high the trestle is. Per my Mallory's, a 25' 1908 NYNH&H single track timber bent has these members:
    Piles: 10"
    Lower horizontal and cross braces: 2-3"x10"
    Top horizontal under the stringers and on top of the piles: 12"x16"x14'

    For a taller 100' 1890 trestle he shows 12x12 (outer) and 10x12 batters (uprights), 6x12 longitudinals and 3x12 longitudinal cross bracing.

    Stringers depend on span from bent to bent and get tripled under each rail:
    11' - 3"x12"
    13' - 3"x14"
    17' - 3"x16"
    23' - 4"x16"

    Good book - "Bridge and Trestle Handbook" by Paul Mallery.
    Last edited by NtheBasement; 14th Nov 2019 at 09:46 PM. Reason: added 457

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    Hmm, well the Bass Wood I ordered arrived and it was the wrong size - 3/16th X 3/16th. I think 30" pylons might be a tad over kill. Not sure if I made the mistake or the wrong stuff was shipped, either way it doesn't matter, I'll find a use for it

    Any how, the correct size has been ordered 3/32nd X 3/32nd and should be here by the end of the week early next week along with the rest of the wood.
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    How do these measurements look to you guys:



    My intention is to have a walkway down one side of the track.
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    Do you have a scale ruler? I highly recommend one if you don’t. Beyond that I have no idea
    ~ Charles

    :shay:

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    Charles,

    No I don't and your right, that is something that should be gotten.
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    There is a Resource Page for Grandt Line here with Trestle Plans
    https://www.grandtline.com/tips-tech...ource-gallery/

    As well as CPR plans
    Attached Files Attached Files

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    One other thing - suggestions to simulate Bolts for the trestle? Are there any Nuts and Bolts in N Scale that might work?
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    Quote Originally Posted by wombat457 View Post
    One other thing - suggestions to simulate Bolts for the trestle? Are there any Nuts and Bolts in N Scale that might work?
    Not really - they are too small but you can simulate them as described at this website
    https://jamestrainparts.com/2015/08/...cale-trestles/

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    Thanks Scotian and yeah a quick search for micro nuts and bolts didn't turn anything up
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    Archer Transfers makes 3D decals that work well for small details like bolts and rivets. I've used their louvers on loco builds, they works great.

    https://www.archertransfers.com/Surf...ilsNscale.html

    Edit- I guess they don't make bolts... My memory misremembered again. :P
    Andrew

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    My recommendation - use styrene. I have built trestles out of scale lumber -- they are OK. Styrene is much stronger. -- and, in my opinion, easier to work with.

    As for nut & bolt detail -- I don't feel they are needed -- not in our scale.

    Here is what I did: It is about 2 feet long





    Here is a close up:


    Thanks,
    Wolf

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    @SP-Wolf what part number styrene did you use?
    ~ Charles

    :shay:

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    Wolf, I agree that styrene would be stronger and your bridge looks absolutely amazing; however, I find working with wood easier and it gives a natural looking wood finish when stained If I were building any other type of bridge though, styrene would be my first choice I think.

    As for the nuts and bolts idea - your right, in hindsight, our scale is a bit small to include that finer detail.
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    Quote Originally Posted by zosimas View Post
    @SP-Wolf what part number styrene did you use?

    Hi Charles,

    When I get home this evening -- I will try and figure that out for you. (It's been a couple of years).
    If I remember correctly -- I used 3 different sizes.

    Wolf

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