. Beam Span Table. . . You should be fine with triple 2×6. 2022 Author: fbp. . The low. Two Double 2×10 6 ft. -0 in. 16'3" double 2x12 header with plywood in between And your roof is very heavy A 2×12 with an E of 800,000 psi and Fb of 790 psi also works, since it can span 15 feet and 10 inches It covers #2 common lumber species and. 2x6 rafters on roof sitting on this span, the roof is comp shingle 4o year i think. . Contents hide. 2022 Author: uom. . 5 inches x 5.