We are working on a cost proposal for an existing 800' long (mulit-span) railroad bridge from the early 1900's that is to be converted into bike path bridge. The bridge was used until the mid 90's and is in really good condition. There are 2 built-up plate girders that are spaced at the gauge of the rail (4'-8.5"). The owner wants a Ipe wood deck that is 14' toe/toe of railing and to support an H10 loading. The piers are not wide enough to add additional beams beside the girders. Just wondering if anyone has run into a project like this before and what you came up with for a deck system. Our thought was to place W sections perpendicular to the girders and then run stringers on top of them with the Ipe deck on top of the stingers. Problem is the cantilever of the perpendicular beams will more than likely be greater than 5.5' and result in a large section and increased costs.
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