bridges

My c. 1947-55 layout (the GN in Montana) has a 40-foot long dry creek bed and a through girder bridge in need of a supporting structure. In the prototype, would a girder bridge ever be supported across its entire length by a trestle only or, as I've seen in a few photos, by stone or concrete...

Hi everyone, new to the forum here so I was hoping someone can help with some tips. Are there any rolling lift bridges available from any N Scale retailer, (Kato, Atlas, Faller, etc)??? If not, does anybody have advice on how to make a manually operated (not motorized) two track rolling...

For anyone building, thinking of building .. maybe .. once thought .. here is a website with literally .. thousands of bridges of all kinds. Now .. I would LOVE to see someone model the ACL Hillsborough River Railroad Bridge, Hillsborough County, Florida. All I can say is .. wow...

An east bound freight crosses over a string of bridges into Janesville's S curve and on to the upper deck.

CB&CNS 2003 ( John Galt) with a load of logs for the sawmill