Two spans - one is clearly abandoned; the other looks viable but may in fact no longer be in service.
Photo taken by Bruce Roberts in March 2022
License: Creative Commons Attribution-Share-Alike (CC BY-SA)
BH Photo #526654
Thanks for the info, Roger! I've corrected this entry.
Yes, that is correct, and true for most of those Ontario highway bridges. Assume the railroads wanted greater rigidity.
Interesting observation Nathan... and something I hadn't even thought about!
The only difference I can see between this bridge and your example, is that the sub-dividing vertical extents from the top to bottom chord on this one.
I don't have an elevation view of these trusses but it looks like each panel has an "X" in it. That would be a subdivided Double-Intersection Warren truss. The type can be found more commonly in Canada.
I'll throw my guess in here. This looks quite a bit like a Baltimore truss, with some extra parts thrown in. It satisfies the basic test for a Baltimore truss, in that it displays the letter M several times. But this unusual bridge also has the letters W and X. For the bridge John Marvig mentioned below, Mike Goff thought that one also looked a bit like a Baltimore truss. Could we just call this one and that similar bridge "modified Baltimore truss"?
BTW Bruce Roberts: Those are not narrow gauge rails in photo #5. They are called guard rails, and are there to keep a derailed car from going too far off the tracks and hitting the side of the bridge or tumbling off into the river. They keep a simple derailment from becoming a much more serious accident. You'll see these on most railroad bridges, trestles, and tunnels, and sometimes just on sharp curves. Lots of examples here. Description: https://en.wikipedia.org/wiki/Guard_rail_(rail) Don't be embarrassed - this is how we all learned. Keep taking good photos!
This about the closest I've seen:
I'm also curious about the builder. The plaque shape suggests American Bridge, but I have not seen that shape on a pre-1910 bridge.
This one is a bit of a head-scratcher. Appears to be some type of a Pratt variant.
John, have you seen another railroad bridge with this truss configuration?
And I made it Sidney with one y.
Good, Tony. Want to add the truss type?
I fixed it Geoff.
Bruce- can you make Photo #3 the thumbnail and the 1st photo?