Saving the model after running analysis will heavily increase the model (file) size.
In some instances the user may want to reduce the size of the file.
To achieve this the user should run the smallest amount of analysis available, line girder, for just one girder and without live load (see screen shot below).
After running the line load analysis save the model with a slightly different name and compare the size of the files.
This scenario is valid only if you design the superstructure; analysis saved from substructure cannot be deleted.