I put some comments in the script.
Note that this is a rough test script it handles basically nothing as I din’t have time to improve it 
So it is working with multiple corridors, but all inputs must be on the correct level, can’t be empty etc.
If you want to define inlcuded codes not the excluded, then change param.ExcludedCodes to param.IncludedCodes
And if you want to export only shapes or links add:
param.ExportLinks = false
param.ExportShapes = false
exportcorridorsolids.dwg (6.5 MB)
exportcorridorsolids.dyn (26.1 KB)