I already had great suggestions on my first post, and here I have another question.
I’m building a 12×12 shed and I was wondering if I can use 2×4 lumber for the double door header sandwiched with OSB or plywood. (Two doors 3 ft wide each)Do you think it could be enough, or I would need to use 2×6 lumber? I attached a sketch. Thank you for your help.