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OWMac
USA
449 Posts |
 Posted - 11/18/2009 : 16:34:59
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I saw a post on the Wednesday Pic's from Dan concerning Trestle Bents. I have engineering diagrams of the O&W trestles at Orrs Mill and Lyons Bridge. Orrs Mill is a double track trestle and Lyons bridge is single track. They are representative of Northeastern/Eastern Roads and were built in the WWI era. The double track bents and construction was significantly more robust that the single track. If you've seen the Micro engineering single track HO kits that is pretty much standard. The legs/colums/posts were latticed. The transgirder was not very substantial. On a double track bridge the legs are three sided box columns nearly 2 feet wide. The trans girder was in the 42" range and had stiffeners where the right of way bridge sat on it. Let me know which type you are interested in. The Orrs Mill Trestle construction starts on the home layout in January. 20 bents and approx 650 scale feet long. It's going to take months.I can post dimensions and info on either type. The plans are too large to scan, but I can scan portions of them. I also have The plans for Idlewild trestle a two bent double track bridge, and a standard bridge for wagon and foot traffic over the double track ROW. It was used at creamery locations to prevent farmers from clogging the mail line.
Here's Orrs Mill laid out... just recently.
These were taken after the O&W was abandoned. It was single tracked in 1946.
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MAC |
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bxcxdan
USA
405 Posts |
Posted - 11/18/2009 : 19:13:39
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MAC!
Good beans! I mean, "Cool Bents!" OK, enough of the play on words.
Here is the link of the trestle I am to represent on the layout here. It was on the former Mass Central RR located in Bondsville, MA. I do have the actual drawings of trestle a good friend of mine got from the Boston & Maine Historical Society.
It is not there now. Most likely like the ones on the O&W.
http://dlib.cwmars.org/cdm4/item_viewer.php?CISOROOT=/palmer&CISOPTR=16&REC=5
With that, I need the bents, which are latticed as you state yours are and look like the Micro Engineering trestles. As we know, the Micro Engineering bents are too small.
What exactly are you offering?
Thanks very much for the post and the offering.
Dan
here is my email address.
dan.bigda@boxcarservices.com |
Daniel M. Bigda
Boxcar Services L.L.C. |
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OWMac
USA
449 Posts |
Posted - 11/18/2009 : 19:39:41
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| You want the single track Lyons Brook Trestle. I only have 1 or two sheets of that trestle because they were sent to me in error when I had requested prints of a different bridge.Let me find them and see if I can digitize them by taking digital photo's. If the quality is really poor I'll make a series of copies and can send those to you. The sheets are 4'x3' and larger. This has a lot of the detail for attaching the ties to the bridges, the piers and cross bracing. |
MAC |
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bxcxdan
USA
405 Posts |
Posted - 11/18/2009 : 20:40:56
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MAC,
So you are going to offer those drawings? I do have all the drawings of the Bondsville Trestle. But more information is better than not enough!
What the real need is the actual bents and the lattice work. I think by taking apart a couple of Atlas Truss bridges, I will get what I need.
Do you have thoughts on how you are going to go about
making those parts?
Thanks,
Dan |
Daniel M. Bigda
Boxcar Services L.L.C. |
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OWMac
USA
449 Posts |
Posted - 11/18/2009 : 23:28:05
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I see the construction in three parts
1) Piers and Abutments.. I use 2 Inch closed cell foam and plaster mix spiked with some mortar mix to give the surface texture.I'll carve a form that is slightly smaller than the finished product and then skim coat it with the plaster mortar mix. 2) Bridges..I've been collecting different parts for the spans and have multiple sizes. I am going to make two masters of each size using commercial parts and then start casting.
3. The bents will require columns which I will make out of the major beams of the ATlas Truss bridge, I will make as many columns as one bridge will provide and then will cast duplicates. I'll make 2 masters of the transgirder and then cast the rest. The supports between the columns and bents of each tower will be plastruct as I need too many to take from ATlas bridges and I can't cast them.I doubt that I will follow prototype accurately here but I'll do the best I can. I anticipate using lots of styrene and resin and two part rubber molds. If I could afford it I'd buy 10-12 more truss bridges but in addition to the cost the labor would be excessive. I'm hoping to finish one tower a month for 9 months and with a little luck I might have it in place next year. |
MAC |
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OWMac
USA
449 Posts |
Posted - 11/18/2009 : 23:30:33
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| One other thought. I purchase two kits that Atlas makes that converts one of their single track truss bridges to a double track bridge. Lots of good parts in there for bridge making. I bought two from Norm when he was closing them out for $25 each. Check it our you might find it useful. |
MAC |
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bxcxdan
USA
405 Posts |
Posted - 11/19/2009 : 09:08:34
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MAC,
I will also be using the 2" pink or blue foam. I have it in my garage already to go. Also, have the glues and whatever to put it all together.
When do you think you will start the bents? I am well versed in making rubber molds and castings. I am looking at the Atlas truss bridges and will some of those parts. I may even look at casting them my self or I may farm it out to a company like Sylvan. They also use a good casting material in their products and they are set up for such work.
That white casting material is much much better than that oil smelling yellow looking stuff. Works better also.
The girders I will either make or throw in my mill and cut down some versions I have or will even make them using plastruct or Evergreen products. But that lattice work beams are going to be the hardest part. With those, if you cast them, I think the clean up work on and in between the lattice work will be a lot of work. So with that, I am skeptical.
Anyhow, more research to do.
Dan |
Daniel M. Bigda
Boxcar Services L.L.C. |
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Ken the guy from AR
USA
80 Posts |
Posted - 11/19/2009 : 19:36:35
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| I have been thinking or casting up some lattice work beams. I think they would cast up nicely building the masters would be a bear. Lots of little parts to put together and they would have to be very precise or it would ruin the whole look of the thing. I would think that if you had some sections 6 to 9 inches long you could chain them together to what ever length you need. I may look at doing this project again. |
Ken the guy from AR
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bxcxdan
USA
405 Posts |
Posted - 11/19/2009 : 22:34:34
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Gents, MAC,
I contacted a prototype shop that I used when I was at Lionel in Michigan. I sent them a scan of the Micro Engineering model and I will send them a copy of the sprue I have. They said they can make the bents no problem. I will have them size it up to O-Scale dimensions.
With this, I will keep you posted on availability, pricing and so-forth. If you are interested, I will let all of you know the costing and if you want any, let me know.
Thanks,
Dan |
Daniel M. Bigda
Boxcar Services L.L.C. |
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CBQer
USA
1002 Posts |
Posted - 11/19/2009 : 23:45:23
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We have a large bridge like that here in Iowa near Boone. It's called the Kate Shelly Bridge. It's story, I don't remember but the span in one of the larger in the US. The UP just finished a new bridge but left the old one up for biking. There is also a good size span over in Ft. Dodge, IA.
Dick |
Charter Memer Golden Spike Club
"Welcome Home" |
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