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Model Forum / General / Railroads / June 2004When is a bridge a Viaduct
Last night at the club running night a question was asked by one of the memeber what is the diffenece between a bridge and a viaduct? Does a viaduct go over water? Does a bridge go over land? Wayne > Last night at the club running night a question was asked by one of the > memeber what is the diffenece between a bridge and a viaduct? > Does a viaduct go over water? > Does a bridge go over land? > > Wayne Websters dictionary says: Bridge - A structure, usually of wood, stone, brick, or iron, erected over a river or other water course, or over a chasm, railroad, etc., to make a passageway from one bank to the other.. Viaduct - A structure of considerable magnitude, usually with arches or supported on trestles, for carrying a road, as a railroad, high above the ground or water; a bridge; especially, one for crossing a valley or a gorge. Michael S. > Last night at the club running night a question was asked by one of the > memeber what is the diffenece between a bridge and a viaduct? > Does a viaduct go over water? > Does a bridge go over land? > > Wayne The Marx Brothers answer would be that it's a viaduct when it's not a chicken. :) A viaduct, in English usage, is a bridge with more than one span. It comes from the Latin "viaduct", which is a variant on the word "aqueduct" (a conduit to carry water). > The Marx Brothers answer would be that it's a viaduct when it's not a > chicken. :) Damn - you stole my response... :-) Steve > > The Marx Brothers answer would be that it's a viaduct when it's not a > > chicken. :) > > > Damn - you stole my response... :-) > > Steve You could have said that my answer only applied when the viaduct was attached to a small peninsula :-) -- " > > Last night at the club running night a question was asked by one of the > > memeber what is the diffenece between a bridge and a viaduct? > > Does a viaduct go over water? > > Does a bridge go over land? > > A viaduct, in English usage, is a bridge with more than one span. hmmm....I think I prefer the dictionary definition. By the definition above, that large steel railway structure over the Hawkesbury R near near Brooklyn is really a viaduct and not a bridge, as I've thought all these years! My Australian Oxford Dictionary says a viaduct is a long, bridge-like structure, usually with a series of arches, for carrying a road or railway over a valley or dip in the ground. Oxford says a bridge is a structure providing a way across a river, railway, etc. >.It comes > from the Latin "viaduct", which is a variant on the word "aqueduct" (a > conduit to carry water). But often a viaduct would carry the aquaduct across a valley! That railway structure which crosses an arm of the Melton weir...I think that is generally called "The Melton Viaduct"....yes? But no arches. I guess a viaduct can have a bridge as part of it, as you would see where a railway is elevated across a flood plain, and there is a long trussed span where it crosses the river proper. Numerous examples on NSW north coast line, North Wagga...(fill in your own local example here)... ................Bill > -- > " [quoted text clipped - 29 lines] > line, North Wagga...(fill in your own local example here)... > ................Bill In short, a bridge is a viaduct and a viaduct is a bridge. An aqueduct is a bridge that carries water. Viaducts have even been known to carry chickens. > > -- > > " [quoted text clipped - 38 lines] > In short, a bridge is a viaduct and a viaduct is a bridge. An aqueduct is a > bridge that carries water. I would suggest from the above definitions a viaduct is a type of bridge, a multi span arch in compression type. Not all bridges are viaducts. > Viaducts have even been known to carry chickens.  SignatureTerry Flynn For HO scale track standards go to http://angelfire.com/clone/rail/index.html also includes details of HO wagon weight and locomotive tractive effort estimates Entirely a matter of terminology I think. There is a difference between a culvert and a bridge or a viaduct, but that's about it By the way, Melton is a curous case, because the bridge or viaduct was there before the weir, meaning it was intially mostly over dry land and then the lower parts of the piers were submerged. > -- > " [quoted text clipped - 29 lines] > line, North Wagga...(fill in your own local example here)... > ................Bill |
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