Hi, I am trying to draw roof trusses and rafters. Is there a library I can import then modify to my dimensions, or how do I do it from the lumbar library? Grateful for any help

Thanks everyone - I now have what I needed.

Was wondering if anyone can tell me if there is a library I can download with metal objects for example: angle iron, H iron, channel iron, solid round bar, solid flat bar etc etc.
Thanks
Bob

I have been trying to put a skylight/velux window and a dormer window into a roof, but am having trouble with getting one to be see through.

If I use a roof from the library I imported, there are two with dormers and you can see through the windows, but when I size the roof to my building, the ...