Talk:Compression arch suspended-deck bridge

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I have attempted to clean up this stub a little bit. I could not rescue this passage, as I don't know what it is attempting to communicate:

"Where the arch cannot neither supported from below nor brought to completion by flying cantilevers it is brought out from each landing point using temporary cable stays supported from temporary towers, kept from tipping inward by stays downward to earth anchors."

Perhaps someone with some civil engineering knowledge can edit it appropriately. Molinari 03:15, 11 Feb 2005 (UTC)

This doesn't seem to be a very common term for a common type of bridge. Through arch bridge seems slightly better but still uncommon. Any ideas? --SPUI (T - C) 10:00, 25 May 2006 (UTC)

Hi everyone. I prefer the name through arch over compression arch suspended span. On the issue of combining this article with tied arch bridge, I'm against it. While a tied (or bowstring) arch bridge is a through arch, not all through arches are tied arches. A tied arch (such as the Fort Pitt Bridge) uses the deck as a tension element, to keep the arch from collapsing, while an untied arch (such as the Sydney Harbour Bridge) uses the ground (and sometimes the rigidity of its truss structure) to counter the outward horizontal thrust of the arch. Robshill 19:47, 26 May 2006 (UTC)

A tied arch could be considered a subtype of suspended deck type, since it is possible to use compression in the arch without tension in the suspended deck. Also, wouldn't a through arch bridge be another type than suspended deck (the roadbead supported by and running between the arches)? - Leonard G. 15:47, 11 July 2006 (UTC)

[edit] Tied Arch

I do not know what the fuss is about. The tied arch is completely different in how it is supported as compared to the compression arch (although all arches do act in compression). The compression arch suggests that the earth is the horizontal reaction force of the arch, while the tie suggests that the arch resists its own force. They should not be combined as one type.