Skip to main content

13 replies

Pratt bridges?

P PJBOGR Forum Member
We have a folded dogbone with an over/under configuration. The double mains elevate and then curve to the left into where we will have the cityscape. Outer is 090 then 081. Inner in 090 then 072. At that point, I was thinking a waterway under the elevated section would be a great separator between the city and adjacent outlying area. I'd like a simple bridge that would be sort of typical for a water-crossing from upstate into the Bronx, but nothing elaborate. I'd need it wide enough to accommodate the double mains and be something I can custom curve. And if need to be able to custom it for length. Was thinking a simple Pratt bridge might do it? 

For what it's worth, the area for the bridge would be the double mains area between the NYC passenger car (sitting on the mains in the elevated area) and the yellow right angle thingy.

Any recs for my needs would be MOST appreciated.  Didn't see anything at Woodland Scenics, Scenic Express or Bridgeboss.

Thanks.

Peterimage

Attachments

Hide
Images (1)
  • image
Last edited by PJB
Original Post

Replies sorted oldest to newest

P PJBOGR Forum Member
I did, and it's not out of the picture. But the rationale for going with a simple Pratt was because the width of that area is only approx. 18" and the Pratt bridge, because of its small proportions, would allow that opening to seem bigger and more "open" creating an illusion of a wider and bigger waterway gap.  But I am using a lot of stone for that area given that area in New York has a lot of stone and bedrock jutting out. Do you know of a stone bridge that won't break the bank and would meet my needs?  Thanks. Peter
Last edited by PJB
PingmanPingmanOGR Forum Member

Check out Scenic Express website; they offer a plate girder in plastic that is bendable to 24" diameter to serve as the sides of a faux plate girder bridge; i.e., make the curve you want with a plywood base then add details, including the Scenic Express sides.  I don't know if that would work for you.

 

If you want to consider a straight Truss bridge, Plastruct offers a 30" kit for $49.95 msrp in O scale; part no. 3002.

 

Good luck with your project. 

Last edited by Pingman
P PJBOGR Forum Member

Tim W - updated my profile with my email address. 

 

Pingman - thanks. Sounds like what I was hoping to find somewhere. I didn't see what you are referencing when I looked at the WS site over the weekend. And when I went through the catalogue they sent me in December. I'll take another look. 

Last edited by PJB
P PJBOGR Forum Member

Hey, I checked out Scenic Express and that girder bridge looks like it might be a winner!  I will wait to see if Tim W emails some alternative approach (from his post above sounds like he has something in-mind) but otherwise, I might just be calling SE tomorrow!  

 

nb - I think I actually saw this one but stopped reading when I saw "hot riveted iron plate" thinking it was metal.  

 

Thanks all.  

 

Peter

Last edited by PJB
Richard ERichard EOGR Forum Member

Curved railroad bridges, with the exception of masonry viaducts, are non-existent. To build a steel or wood bridge on a curve they build short straight sections, angle them around the curve and lay the track on a curve.

 

Also, if clearance under the bridge isn't a problem, railroads will use a more economical deck bridge. That is one with the entire superstructure is below the tracks

Last edited by Richard E

Add Reply

Views: 683
Post

Membership Required

We're sorry. You must be signed in to continue. Sign In or Register
×
Are you sure you want to remove from your Block List?
×
Loading...
×
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .
×
Link copied to your clipboard.
×

Access to this requires an OGR Forum Supporting Membership

OGR Forum Supporting Membership

Help support this forum with an OGR Forum Supporting Membership.
You will be able to watch the videos in the INSTRUCTIONAL VIDEO FORUM!
A one-year OGR Forum Supporting Membership is only $12 per year, so sign up now!


    OR     


Access the ALL the OGR VIDEO FORUMS AND  over 300 back issues of OGR
with a DIGITAL SUBSCRIPTION!



$12.00 per 12 Months (plus tax if applicable)
×