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StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7185
Experience:  Structural Engineer
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Still planning the project. Hopefully you still have access

Customer Question

Still planning the project. Hopefully you still have access to the uploaded floor framing plan. Roof rafters question: width of building 12', length of roof back to front 16'. Planning on using corrugated tin for the roofing with 1x's (or possibly 2x's)
horizontally to support the tin and insulation underneath. I'm having trouble calculating the rafter lengths. With a slope of 4/12 and rise of 3' in the center (to get the 4/12 slope) what length of lumber should I use for the roof framing? Thanks!
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.

Hello. How are you doing? I'll be happy to assist you.

Expert:  StructuralEng replied 1 year ago.

I will look back at your previous question and get back to you later today

Customer: replied 1 year ago.
Ok thanks!
Expert:  StructuralEng replied 1 year ago.

Are the rafters spanning the 16' direction or the 12' direction? The rafters are spanning from a ridge in the middle to the eaves?

Customer: replied 1 year ago.
Rafters spanning the 12' direction. The ridge in the middle will be at 6' and run the 16' length + eaves. The 12' side should have some overhang (6" or 12" or something inbetween?).
Expert:  StructuralEng replied 1 year ago.

The ridge should be a triple 2x12.

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