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Draw vs. swing vs. lift
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   Draw vs. swing vs. lift
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   Author  Topic: Draw vs. swing vs. lift  (Read 2375 times)
Lfire83
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Re: Draw vs. swing vs. lift
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« Reply #80 on: Dec 16th, 2012, 2:51pm »
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Another swing span over the Flint River on the CSX mainline through Bainbridge, GA

http://Forums.Railfan.net/Images/Infrastructure/way9_857x569.jpg
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Lfire83
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Re: Draw vs. swing vs. lift
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« Reply #81 on: Dec 16th, 2012, 2:55pm »
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Still in Bainbridge but a few hundred yards south is another Flint River swing span on CSX's north-south line that was formerly the Seaboard mainline to Columbus GA.

http://Forums.Railfan.net/Images/Infrastructure/way8_857x569.jpg
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ClydeDET
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Re: Draw vs. swing vs. lift
 
« Reply #82 on: Dec 16th, 2012, 10:19pm »
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Have noted the bridge over Mantua Creek in New Jersey involved in the recent derailment and HAZMAT release (vinyl chloride) is an unusual swing bridge. Single span, pivot is off the line of the track so it is like a shelf with track on it, with hinge at one corner. Friend and I built one much like it (with no idea it had a prototype on a rail line) to allow his layout to operte across a door without having a duck-under. Seems there is a prototype for any thing...

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CHESSIEMIKE
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Re: Draw vs. swing vs. lift
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« Reply #83 on: Feb 16th, 2013, 7:08am »
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The Long Bridge over the Potomac River has a swing span portion. Here we see Amtrak train #20, AKA the Crescent, crossing the CSX bridge into Washington DC. at 0938Hrs on 2/12/13.
CHESSIEMIKE


http://Forums.Railfan.net/Images/Infrastructure/Amtrak_Train_20_small.jpg
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Remember that a lone amateur built the Ark. A large group of professionals built the Titanic.
George_Harris
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Re: Draw vs. swing vs. lift
 
« Reply #84 on: Feb 20th, 2013, 11:15pm »
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on Feb 16th, 2013, 7:08am, CHESSIEMIKE wrote:       (Click here for original message)
The Long Bridge over the Potomac River has a swing span portion. Here we see Amtrak train #20, AKA the Crescent, crossing the CSX bridge into Washington DC. at 0938Hrs on 2/12/13.
CHESSIEMIKE

This bridge has not been opened in years.  The joints in the rails have long since been taken out.  Don't know whether the machinery is still in place or not.  Although not a railroad bridge, the Arlington Memorial Bridge has a draw span in it, again not used in years.  The 14th street bridges in between them, and the Metro bridge do not have draw spans.


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CHESSIEMIKE
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Re: Draw vs. swing vs. lift
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« Reply #85 on: Jun 29th, 2013, 9:47pm »
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Ok, thanks for the correction. Seems a lot of bridge structures that at one time opened for water traffic no longer do that. This one, however, seems to still be in use. The ex-PRR bridge over the headwaters of the Nanticoke River in Seaford, DE on 6/26/13.
CHESSIEMIKE


http://Forums.Railfan.net/Images/Infrastructure/Swing_Bridge_at_Seaford_DE_small.jpg
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Remember that a lone amateur built the Ark. A large group of professionals built the Titanic.
George_Harris
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Re: Draw vs. swing vs. lift
 
« Reply #86 on: Jul 4th, 2017, 12:18am »
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The derailment of the Talgo train in Washingon State in approach to the vertical lift near Tacoma got me to taking a look at the bridge, which is a rather interesting structure.  (I intend to add info on the derailment itself later, but here is the info on the bridge.)
 
This appeared to have occured at the derail in approach to the drawbridge over the entrance to Chambers Bay. An interesting little bridge. A description of it from an item published in the Federal Register: Quote:
The Chambers Creek Burlington Northern Santa Fe Railroad vertical lift railroad bridge across Chambers Creek, mile 0.01, near Steilacoom in Pierce County, WA, has a vertical clearance of 10ft in the closed-to-navigation position, and 50ft of vertical clearance in the open-to-navigation position.

For a picture, see Bridgehunter,  
http://bridgehunter.com/wa/pierce/bh46496/
In this it is described as having a maximum span of 97 feet and being a "Strauss patent direct-lift vertical lift bridge, pony truss."
Another article about the bridge with some good pictures is https://www.aisc.org/globalassets/modern-steel/archives/2014/12/centurion.pdf
This bridge was built in 1914, is a very unique bridge, one of only three like it ever built in the US (maybe one or a few in Canada?), and the only one remaining in the US, plus one in Canada. Based on the article in the Steel magazine, it is opened/closed by four 25 horsepower motors.


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George_Harris
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Re: Draw vs. swing vs. lift
 
« Reply #87 on: Jul 5th, 2017, 2:39am »
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A little more on the Stelliacoom Drawbridge:  The 0.1 mile in the Federal Register is the river mile.  In the BNSF employee the bridge is described as West Tacoma, Drawbridge 14. It is shown as having a 40 mph speed limit, with speeds in approaches shown as  
MP 13.2 - 14.0  
Talgo 67
Passenger 60
Freight 50
 
MP 14.0 - 14.3 Includes the bridge
40 mph all types of trains
 
MP 14.3 - 15.9
50 mph all types of trains
 
Why a lift type, in fact why are all recently built drawbridges I can think of lift bridges, although not this type of lift?
A lift is in general the preferred type because everything stays oriented the same way in relation to gravity. That is, you don't have to contend with having everything tight enough that the rail and other miscellaneous items don't want to slide when the bridge is in the up position. The need for the huge center pier located at what frequently is the deepest part of the stream and most likely to be kissed by river traffic is a major disadvantage of the swing span, also the navigatable channel is less than half the movable length of the bridge.


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ClydeDET
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Re: Draw vs. swing vs. lift
 
« Reply #88 on: Jul 20th, 2017, 10:17pm »
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Thinking of swing bridges, there was once one (well, actually still is) across the Trinity River at Riverside, a trifle west of Trinity, TX. Put in early in the 20th Century, I understand exercised ONCE (thereafter - waiting for river traffic that never materialized), then left closed by in theory operational. Some few years ago, machinery was removed and bridge became just a bridge. On line once MoPac, now UP.

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George_Harris
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Re: Draw vs. swing vs. lift
 
« Reply #89 on: Jul 23rd, 2017, 9:16pm »
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on Jul 20th, 2017, 10:17pm, ClydeDET wrote:       (Click here for original message)
Thinking of swing bridges, there was once one (well, actually still is) across the Trinity River at Riverside, a trifle west of Trinity, TX. Put in early in the 20th Century, I understand exercised ONCE (thereafter - waiting for river traffic that never materialized), then left closed by in theory operational. Some few years ago, machinery was removed and bridge became just a bridge. On line once MoPac, now UP.
And if I am right, on the Palestine - Conroe - Houston line of the MoPac used by the Houston section of the Texas Eagle.  


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