This an interesting read, with photos.
http://www.tidewatersouthernrailway.org/index.php/bridges/stanislaus-river
Mike.
My You Tube
Yeah I was hoping that there would be some high trestle examples, I might do something like Stanislaus River Bridge that was in MR a while back.
Steve
If everything seems under control, you're not going fast enough!
An interesting round-over on the end of the girder. Since there's not one at the other end, I'm gonna assume it was done to keep low hanging loads from slamming the end of the girder. Which I've never seen before. But it also might explain the more common double-ended version of the round-over.
I would have thought they'd use a deck girder. Is there a road underneath that needs the clearance?
By the way:
In the above photo, there is one bridge but a least four spans (depending on how you classify the trestle)(two truss and two girder). Abutments are normally only at the ends of a bridge--besides vertical support, they hold the embankment back and provide longitudinal stability. Piers are used between abutments. And trestles, again, kind of cloud the issue.
Ed
Here's another example of a combination through girder, twin modified Pratt Trusses, another through girder, and what's left of a timber trestle. This is over the Gaspereau River in Nova Scotia, part of the abandoned Dominion Atlantic Rwy.
mbinsewi 7j43k I put this one in because I can see the tie in for a sway brace on the lower right. And the bent cross beam at the top. You'd think that would've done some damage to whatever hit it. Funny the other end isn't bent. Mike.
7j43k I put this one in because I can see the tie in for a sway brace on the lower right.
And the bent cross beam at the top. You'd think that would've done some damage to whatever hit it. Funny the other end isn't bent.
Wow! Yes.
Note, also, what is entirely missing at that same location at the other end.
Good time, good times!
7j43kI put this one in because I can see the tie in for a sway brace on the lower right.
Ya mean like this:
Took less than a minute to find that one. Do you young folks know about internet searching? It's, how do you guys say, COOL!.
That shot looks a lot like it's the trestle/bridge system paralleling US 80 just west of Sacramento. But that would be wrong: Tempe Lake Bridge on the SP.
Brazos River:
I put this one in because I can see the tie-in for a sway brace on the lower right.
These are all low trestles. I think it unlikely you'll find a steel truss span used in a high trestle.
Yes, they were. Wood trestles are often used for the approach to steel truss bridges. The tendency is to have a stone or concrete abutment actually supporting the truss at its ends, but even then pilings may be used depending on the ground that lies beneath.
Mike Lehman
Urbana, IL
I was looking at some bridges for a possible diorama, I was wondering were wood trestles ever used as approaches or supports for steel trusses?
Thanks.