I found a site with textures for corrugated metal siding and roofing,
here .
They also have some GDL parts in their
3D Rainhead Library; and
You have to be a member to download the GDL parts, but its free and simple to join. Note that the GSM files are the GDL parts for ArchiCAD. Don’t ask me, I didn’t come up with it. If my links don’t work go to http://www.steelselect.com/index.php and navigate on your own.
