I'm designing my new home. I live in the desert southwest (Nevada). The house will have an adobe style, i.e. it will be 8" cmu's covered with stucco.
I will have an essentially flat roof (1/2:12). I would like to use 6x6 yellow pine beams as joists for the roof with about 18" of each beam protruding from the walls.
The floor plan is rectangular. with the rooms being 12x12, 16x16, 12x16, 8x12.... I'd like to place these 6x6 roof joists 48" OC with spans of 12' and 16'.
From an engineering perspective, is this feasible? The county I live in goes by the 2006 IRC, which does allow for unconventional spacing IF properly engineered.