Question/Dilemma about High Bridge Construction...?
NW Mailing List
nw-mailing-list at nwhs.org
Thu May 8 13:44:42 EDT 2014
Cotton Mill Trestle in Lynchburg is the same way. The single mainline track is offset to the south side of the bridge with room to accommodate another track on the north side.
Jeff Hawkins
----- Original Message -----
From: "NW Mailing List" <nw-mailing-list at nwhs.org>
To: nw-mailing-list at nwhs.org
Sent: Thursday, May 8, 2014 11:19:03 AM
Subject: Re: Question/Dilemma about High Bridge Construction...?
I read some time ago that the bridge was built to accomodate double
track,but that the plans to put in the double track never came to be.
JB Farley
Could it possibly be that there were plans to double track the bridge?
I recall hearing something about that at one time. Alan Cox
In a message dated 5/7/2014 9:18:56 A.M. Eastern Daylight Time,
nw-mailing-list at nwhs.org writes:
Guys
Can you help unravel this mystery?
Why are the High Bridge Rails off to one side of the towers now as
opposed to directly in the center of the towers originally as seen in
the Vail pics attached below.
Bob Flippen
Moderator:
http://nwhs.org/mailinglist/2014/20140507.hb.3.jpg
http://nwhs.org/mailinglist/2014/20140507.hb.4.jpg
http://nwhs.org/mailinglist/2014/20140507.hb.5.jpg
http://nwhs.org/mailinglist/2014/20140507.hb.22.jpg
------------------------------
In Vail's photos, it appears that the bridge spans were laid in the
center of the towers, as is clearly shown in the first attached file
(and many of his other photos). The girders of the span run right
across the two stiffeners (or whatever they are) in the center of
the
cross-girder at the top of the bridge bents/towers.
BUT... today the bridge spans run along one side of the towers, as
clearly shown in the 2nd and 3rd attachments. The spans do not run
directly over the two stiffeners in the center of the cross-girder.
And, in fact, in Vail's photo of the new and old bridge together
(4th
attached), the girders of the new bridge clearly rest on the
outside of the tower. This makes sense since the bridge was
constructed to
support two tracks.
So what am I missing??? I looks like the constructed spans on
which the steam crane rode to install the top section of the bents
and the
next bridge spans isn't in the same position as the final bridge
spans! Were these spans temporary to support the installation, and
then
moved? Nothing is mentioned of moving the spans later, and that
seems like it would be a waste of time and energy. And Vail's
photo of the complete bridge shows the spans in place on the towers
as we see them today. I'm obviously missing something!
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-----Original Message-----
From: NW Mailing List <nw-mailing-list at nwhs.org>
To: nw-mailing-list <nw-mailing-list at nwhs.org>
Sent: Thu, May 8, 2014 4:43 am
Subject: Re: Question/Dilemma about High Bridge Construction...?
Could it possibly be that there were plans to double track the bridge?
I recall hearing something about that at one time. Alan Cox
In a message dated 5/7/2014 9:18:56 A.M. Eastern Daylight Time,
nw-mailing-list at nwhs.org writes:
Guys
Can you help unravel this mystery?
Why are the High Bridge Rails off to one side of the towers now as
opposed to directly in the center of the towers originally as seen in
the Vail pics attached below.
Bob Flippen
Moderator:
http://nwhs.org/mailinglist/2014/20140507.hb.3.jpg
http://nwhs.org/mailinglist/2014/20140507.hb.4.jpg
http://nwhs.org/mailinglist/2014/20140507.hb.5.jpg
http://nwhs.org/mailinglist/2014/20140507.hb.22.jpg
------------------------------
In Vail's photos, it appears that the bridge spans were laid in the
center of the towers, as is clearly shown in the first attached file
(and many of his other photos). The girders of the span run right
across the two stiffeners (or whatever they are) in the center of
the
cross-girder at the top of the bridge bents/towers.
BUT... today the bridge spans run along one side of the towers, as
clearly shown in the 2nd and 3rd attachments. The spans do not run
directly over the two stiffeners in the center of the cross-girder.
And, in fact, in Vail's photo of the new and old bridge together
(4th
attached), the girders of the new bridge clearly rest on the
outside of the tower. This makes sense since the bridge was
constructed to
support two tracks.
So what am I missing??? I looks like the constructed spans on
which the steam crane rode to install the top section of the bents
and the
next bridge spans isn't in the same position as the final bridge
spans! Were these spans temporary to support the installation, and
then
moved? Nothing is mentioned of moving the spans later, and that
seems like it would be a waste of time and energy. And Vail's
photo of the complete bridge shows the spans in place on the towers
as we see them today. I'm obviously missing something!
________________________________________
NW-Mailing-List at nwhs.org
To change your subscription go to
http://list.nwhs.org/mailman/options/nw-mailing-list
Browse the NW-Mailing-List archives at
http://list.nwhs.org/pipermail/nw-mailing-list/
________________________________________NW-Mailing-List at nwhs.orgTo
change your subscription go
tohttp://list.nwhs.org/mailman/options/nw-mailing-listBrowse the
NW-Mailing-List archives
athttp://list.nwhs.org/pipermail/nw-mailing-list/
________________________________________
NW-Mailing-List at nwhs.org
To change your subscription go to
http://list.nwhs.org/mailman/options/nw-mailing-list
Browse the NW-Mailing-List archives at
http://list.nwhs.org/pipermail/nw-mailing-list/
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