Purpose in Girder System Projects: Used to define girder spacing in parallel/concentric geometry Girder System Projects. (Not applicable to Line Girder Projects.)
--> Given in girder system input
In Girder System Projects, GDSPC is a list of girder spacings (feet or meters). The first value is the spacing between Girder 1 and Girder 2, the second value is the spacing between Girder 2 and Girder 3, etc. The girder spacing for box girder bridges is measured between the centers of the box girders.
Purpose in Line Girder Projects: Used to determine lane fractions in LRFD Line Girder Projects.
--> Given in line girder input
In Line Girder Projects, GDSPC is a list of girder spacings by tenth points (feet or meters). Uniform girder spacing is indicated by giving a single value.
Girder Spacing in Parallel/Concentric Girder System Projects