Author Topic: Trout Brook Bridge - Official Work Thread  (Read 67611 times)

Paul Uhland

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Re: Trout Brook Bridge - Official Work Thread
« Reply #375 on: May 28, 2018, 02:08:52 AM »
As Yogi Berra might say..."include me out!"
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Dwight Winkley

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Re: Trout Brook Bridge - Official Work Thread
« Reply #376 on: May 28, 2018, 05:00:09 PM »
Paul, Only the left (west side) truss is roofed. The right truss, (with the tree)will be roofed next Wed, the 30th. If not finished than on Thursday 31st.

Brendan Barry

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Re: Trout Brook Bridge - Official Work Thread
« Reply #377 on: May 31, 2018, 03:42:24 PM »
Photo update courtesy of Linc Reed-Nickerson. The roof is done on the east truss.













United Timber Bridge Workers, Local 1894, Alna, ME

Paul Uhland

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Re: Trout Brook Bridge - Official Work Thread
« Reply #378 on: June 01, 2018, 12:02:47 AM »
Excuse my impatience...both roofs now done. Terrif!  ;D
Also, it's posted that the new bridge will be decked with 3x10s. Sounds heavy.
The original bridge isometric only shows, above the lower main cross members and diagonals,  four courses of longitudinal stringers upon which long ties, then rails, were laid.
What has changed?
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John Kokas

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Re: Trout Brook Bridge - Official Work Thread
« Reply #379 on: June 01, 2018, 12:09:29 AM »
My guess is lower dead load on the bridge.  Span has been narrowed thus less weight on the span and also smaller train live loads which gives you the ability to add decking load without effecting overall span capacity.  In really basic terms we stripped the car down and if we add a couple of things back, no big deal.....
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Mike Fox

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Re: Trout Brook Bridge - Official Work Thread
« Reply #380 on: June 01, 2018, 12:19:53 AM »
Paul,
The cross bracing that is on the joists originally had some beefy longituinal stringers that ran the length of the bridge, something like 8"w X 14"tall. Then the ties sat on those. This made for a very solid bridge.

Our modification, under the approval of the bridge engineer, is to fill in the spaces on top of the joists between the cross bracing. Then lay the track directly on the cross bracing and our new filler blocks. The 3 inch decking will then be laid parralell to the rail for the length of the bridge and approach spans.

This new design accomplishes 2 things. First, the lower height allows the bridge to be installed at current grade height, where to build it as it was would have required raising the roadbed about 2 feet.

Second, the 3 inch decking (was planned originally) will allow our contractor to access the south side of the bridge and make repairs to the grade and haul in material much quicker than we ever could.

Hope that answers your question.
« Last Edit: June 01, 2018, 12:21:30 AM by Mike Fox »
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Brendan Barry

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Re: Trout Brook Bridge - Official Work Thread
« Reply #381 on: June 30, 2018, 11:25:45 PM »
Construction of the temporary bridge spans that will be used to roll the bridge into place. I stole a couple of pictures off of the facebook page.

























United Timber Bridge Workers, Local 1894, Alna, ME

Mike Fox

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Re: Trout Brook Bridge - Official Work Thread
« Reply #382 on: June 30, 2018, 11:59:45 PM »
Fantastic Work Brendan. I forgot to go look at those today.
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Bill Baskerville

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Re: Trout Brook Bridge - Official Work Thread
« Reply #383 on: July 01, 2018, 01:28:27 AM »
Ok, I give up again... can someone explain how the temporary bridge spans/slides are to work?
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Mike Fox

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Re: Trout Brook Bridge - Official Work Thread
« Reply #384 on: July 01, 2018, 10:39:42 AM »
The temporary bridge will support the crane for the pile driving, and eventually help set the bridge itself.
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Jeff Schumaker

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Re: Trout Brook Bridge - Official Work Thread
« Reply #385 on: July 01, 2018, 12:58:46 PM »
In the photos, who is doing the welding?

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Harold Downey

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Re: Trout Brook Bridge - Official Work Thread
« Reply #386 on: July 01, 2018, 03:06:17 PM »
I'm pretty sure that's Alan; he welded for an hour or two yesterday.   But Brendan has been doing all the rest of the welding.

Harold

Brendan Barry

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Re: Trout Brook Bridge - Official Work Thread
« Reply #387 on: July 01, 2018, 05:35:26 PM »
Stewart took the picture of me welding sitting in the chair and Alan is welding in the other picture.
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Jeff Schumaker

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Re: Trout Brook Bridge - Official Work Thread
« Reply #388 on: July 01, 2018, 06:14:34 PM »
Next question - how long are the spans?

Jeff S.
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Mike Fox

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Re: Trout Brook Bridge - Official Work Thread
« Reply #389 on: July 01, 2018, 06:18:31 PM »
40 feet. And already have a second life planned..
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