One of the huge disadvantages of SketchUp, is that it doesn't create geometry which is easily (and accurately) shared with other CAD/CAM systems. :(

Any kind of export/import to standard CAD/CAM model formats (STEP, IGES, even JT) would do.

(Note - I last looked a few months ago, so it's possible something has changed since then. Wouldn't bet money on it though, as it seems to be "in purpose" but I'm not sure why.)

FreeCAD on the other hand does use the right kind of geometry, and imports/exports the right formats natively. Your construction engineer would likely have been able to import a FreeCAD created model directly, instead of having to remodel it from scratch. Assuming the model was created decently well of course. ;)

That could have saved a bunch of time.