bum fat cheese,
Greetings. Please find the attached Bridge.rar file.
I ran it several times through SketchUp Pro, and unfortunately there is a major problem with the mesh you created.
Although it looks fine in SketchUp, it doesn't export properly out of the program.
Specifically, the entire front of the bridge has faces that are inside out. More than likely, this happened during extrusion.
This is as good as this model is going to get, at this stage. There's nothing I am able to do, to improve it.
As a test, I ran through several bridges that I downloaded from the SketchUp website. The only issue that I am having regarding faces is with your model.
I don't have the time to attempt to fix the problems with the mesh. If you rework it, I'll run it through SketchUp and export it for you.
Thanks,
Seth Black
Own It, Or Get Owned...