I am building a 16x20 ground level deck with beam supports in 2' concrete on the corners and middle beams. I want to build a cantilevered pergola on one side of the deck, posts total 18' apart with a 3rd post in the center. I plan on using 6x6x10 posts set in 3' deep x 12" concrete, with the beams 2x8x10's sandwhiched on each side of the beam, 3' on back side of beam, 7' out over the deck. 6x6 beam supports at 45* supporting the 7' side from 3' away from the posts. I plan on using around 7 2x6x20's for the rafters. Also, the 3 deck beams will attach to these posts as well at the ground level, so that will be more weight keeping the posts in place. My question is regarding the back side cantilever support. I initially thought about using 6x6 or 4x6 going from the 3' back side of the beam to 2/3 way down the post to support the cantilever side. However I was thinking that using steel support cables anchored into the post footings might be a stronger option? If so, what kind of cable should I use to anchor the cantilever? I plan on starting the build tomorrow.
Thanks in advance for the advice!
Thanks in advance for the advice!