I'm attaching a "lean to" shed to the eave side of my pole building (24'X 56'). The 2x6 trusses extend out and create about a 1 foot soffit. The trusses sit on top of two 2x10's the are attached to either side of the 6x6 posts 8' o.c. The trusses are 4' o.c with 2x4's on top 2' o.c. Metal roof.
I would like the shed to extend out 12' from the wall of the building and keep the same roof line. It has a metal roof now and I would slide the new sheets under the existing roofing. If I was to sister a 2x6 to the truss tail there would be about 1" clearance under that to the 2x10 beam.
What is the best way to attach the new rafters to the existing building and maintain the existing roofline?
How big do these rafters need to be to span the 12' (will have 2x4's over 2'o.c.) Spacing? 24"?
Let me know what info I forgot. Thanks in advance.