do you have something like this in mind?
it is minimalistic. just sticks and nails.
here is the building protocol:
http://www.largescalecentral.com/forums/topic/21015/a-trestle-bridge/view/page/1
Steve Featherkile said:
OK, do you have frost heave problems, jb?
Nope. Everything is floating. Even the bridges and trestles are floating. I do have track movement in the winter, tho.
John Bouck said:
Steve Featherkile said:
OK, do you have frost heave problems, jb?
Nope. Everything is floating. Even the bridges and trestles are floating. I do have track movement in the winter, tho.
That’s what I thought. I’ve dug a few holes in Post Falls in my youth, and there was nothing to give concern about frost heave.
FYI: Trestles 001;
Square timbers are set on a sill.
Round pilings are driven into the ground fat end first.
John
John Bouck said:
" The Rathdrum Prairie is almost all sandy loam."
Apparently you’ve never dug a hole in the Rathdrum prairie, Steve.
Or the Spokane Valley. All the rocks left by the Great Ice Age Flood are deposited there.
I wish it was sandy loam. Then I wouldn’t have had to haul in 12 yards of topsoil for my new front yard.
Just sayin’…
I Have about 8-10 inches of to soil before 300 feet of rock gravel and sand
So thanks for all help.
I have decided on a five pile open frame design like this one
Using this for dimensions (only narrowed for narrow guage)
I will be using round piles. I started out thinking 3 feet of length and 12 1/2 rail to rail hieght. So I started cutting out the wood and laying it out and 3 feet was whimpy it is now 5’ 5" and in order to get the height and look I wanted I went to 14 1/2 rail to rail height. It increased my overall grade to 1.6% instead of 1.5% I think I can live with it.
Devon just in case you need some more info, I found this a great resource as well. http://4largescale.com/trains/trestle.htm
And thanks to Bob Hyman for putting this together. One of our very own here at LSC.
Devon, my railroad is 2.58%, and I can still run decent trains with most of my locomotives. I have a Bachmann 2-4-2 that can’t haul enough to earn its keep, but she is the exception, not the rule.
David Maynard said:
Devon, my railroad is 2.58%, and I can still run decent trains with most of my locomotives. I have a Bachmann 2-4-2 that can’t haul enough to earn its keep, but she is the exception, not the rule.
Yeah I wasn’t worried I really felt I could go to at least 2% but with what I had going there would be no need. 1.5% I considered very safe and would give me plenty of room to fudge like I did.
Heck in my first n scale layout I went 4.5%.
Randy McDonald said:
Devon just in case you need some more info, I found this a great resource as well. http://4largescale.com/trains/trestle.htm
And thanks to Bob Hyman for putting this together. One of our very own here at LSC.
Most excellent resource. I will have to review it but I think I have it down. Those Great Northern plans are a dream. Made it very easy.