Talk:Types of suspension bridges

message: This disambiguation page was recently created.  I'm not convinced it was a good idea.  Please see discussion at Talk:Suspended-deck suspension bridge#Disambiguated_suspension_bridge -- Samuel Wantman 19:51, 6 August 2005 (UTC)
replies: text: I agree, and I have changed it to a set index article (see ). --Una Smith (talk) 15:19, 28 March 2009 (UTC)
thread_title: Disambiguation

message: It is important that any information on hybrid types be very well sourced. For instance, the sole reference given so far to discuss hybrid types (Bridge Engineering by Troyano) describes the Rio Colorado Bridge (Costa Rica) designed by T.Y. Lin as a bridge with "underneath, prestressed concrete main cables." The implication of the discussion is that the author considers it a suspension bridge with a "top-deck," yet he does not say so directly. On the other hand, the NY Times (here) describes the same bridge as an "inverted arch bridge." This shows that a bridge of unique design may be attributed to different classifications by different individuals. This makes sourcing the classification even more important, ande maybe even requires locating multiple sources. (A picture of this bridge can be found here. Let the flash load and click on the first project in the list.) - ¢Spender1983 (talk) 02:07, 1 April 2009 (UTC)
replies: text: Here is another source on the Rio Colorado Bridge (Costa Rica). This article (here) gives a good picture of it under construction. I haven't yet found any construction details of the bridge, but this is an an article from the Prestressed Concrete Institute. It calls the lower member a "chord", not a suspension cable. This implies a concrete "truss". I would think that the lower chord (or suspension member, or whatever you call it) would have been "post-tensioned" (tensioned after concrete was placed) to prevent cracking. This is a complex structure and will never fit neatly into one bridge category. Listing it as a "hybrid" suspension bridge will take a lot of caveats. If enough information could be found, it would make for an interesting article. - ¢Spender1983 (talk) 16:19, 1 April 2009 (UTC)
thread_title:  Section on hybrid types - a word of caution 

message: The source quoted for describing the bridge does not fully support presenting that bridge as a suspension bridge. The source says that the bridge "may be considered of the suspension type with intermediate deck … although, in fact, it is on the borderline between suspension and cable-stayed bridges." This uncertainy in the tone of the cource is not properly carried into the article. Also, Structurae classifies the bridge as cable-stay here. Is there another source for this bridge that gives it a suspension classification? - ¢Spender1983 (talk) 03:08, 1 April 2009 (UTC)
thread_title:  Section on Hybrid Types - Question about Obere Argen Bridge 

message: I found these two sources that identify another type of suspension bridge.
*
*
This type of bridge is still in use today.
*Trekking in Ecuador] (Kunstaetter, 2002) describes a motorized version over the Pastaza River.
*Youtube has videos of the same crossing.
*There was one depicted in the move Proof of Life of the inclined-rope, cradle variety. The kidnap victim is transported across a valley in a one-man "cradle" (Bosun's chair).
I am just not sure of what name should be used. The first reference uses ropeway and that article could certainly be modified to account for this type of bridge. It needs to be distguished from aerial tramway which is used more to transport people either "up a mountain" or "along some distance" (that they could otherwise walk) versus "crossing" a river or valley. - ¢Spender1983 (talk) 16:54, 5 April 2009 (UTC)
thread_title:  Add ropeway as a type of suspension bridge? 

message: FYI I just asked for some editor assistance regarding (1) the lead and (2) the resolution of the "suspended deck bridge" deletion issue. It can be found at Wikipedia:Editor_assistance/Requests#Suspension_bridge. - ¢Spender1983 (talk) 04:15, 8 April 2009 (UTC)
thread_title:  Request for editor assistance 

message: The bridges of the judge James Finley (engineer) had the center part of the suspension chains pass just below the bridge deck and carry it directly, but apart from that, the chains had the usual hangers. I would not call them a hybrid type and, to my knowledge, this type has not been repeated afterwards.The viaduct over the river Oberargen near Wangen, Germany is the :de:Talbrücke Obere Argen on the Federal Motorway Bundesautobahn 96. It is definetely not a suspension bridge of any kind, but a cable-stayed bridge with a small pylon, where some of the cables on one side are continued under the bridge as an underspan.The Akashi Kaikyō Bridge is not a hybrid type. The idea of stiffening the the bridge deck by a truss girder structure has been used many times before.Thus, the section Hybrid types should be deleted entirely. --AHert (talk) 13:49, 26 February 2013 (UTC)
thread_title:  Hybrid types (2)