As I'm building my layout I'm plan a curved wood trestle for the corner of the L shape layout. I was wondering if anyone had or knew of where I could locate a design for the bents. It will be a double track trestle that will stand at least 24" tall and traverse a 90degree turn.
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Kalmbach has a bridge and tunnel book
Ken Patterson has a video on building a trestle bridge. This is a promo for it. I believe he shows how to make a jig for the bents.
Henry
COB Potomac & Northern
Shenandoah Valley
I have built two hugh wood Trestles. They are both the highlight of the layout. All of the dimentions for the bent and everything else came from Kalmback Bridges & Trastles. I think it must have been a first editon publication. The cover has a four engine train coming out of a tunnel across a trestle and a Santa fe moving under it. I would hope that the new additions would have it. In my looking for the original drawing I found the there was never a prototype ever built. I created a jig for the bents and increased the width to include the second track. I made single bents to span both tracks. There was a site that you can download the mag if you cannot find a plan. Track was hand laid.
We had a thread here in 2006 that indicated SP had a double-track wood trestle plan circa 1912-1913. There was a contemporary double-track trestle west of Sacramento that was progressively improved 'over the years' -- no one was sure if it was built to the published plans, but it was a ballasted-deck structure like them.
The same thread indicated that one of the BNSF transcons had a couple of examples of double-track wood structure, one including a skew highway crossing, but was unsure if the structure hadn't been replaced.
All the double-track trestles I see pictures of have the two tracks on separate sets of stringers or girders, and many of them show intermediate crossbracing of the bent structure to handle the offset load. It might be fun to see if any of the Haupt bridges were double-track construction... now that would be an interesting thing to scratchbuild...
My Buddy Gary Schrader built a double track wooden trestle.
See this link: https://oscalekings.org/WP/gary-shrader/Scroll to picture thirteen.
The kalmbach book is a good place to start. there are also SP standards book that have dimensions for trestles. I’m pretty sure there is a drawing of a double track trestle with callouts for dimensions etc. in one of those books.
have fun,
Guy
see stuff at: the Willoughby Line Site
That is a beautiful layout that trestle is exactly the type I'm going for just a lot bigger haha