Looking for some structural wisdom 🙂
I have a deck that sits 6 feet off the ground, and I want to build a pergola whose "roof" (beams/slats) are 9 feet above the deck. So, from ground (grass) to roof beams, would be 15 feet (6+9).
I don't want to build the pergola ON the deck, because I don't know if the deck can sustain that extra load.
My plan is to dig 4 new footers (one for each post) NEXT to the deck (two on each side).
Being that the deck is raised 6 feet up and the ceiling is 9 feet above that, these 6×6 posts would be 15 feet above ground level and 5 feet in the ground (6x6x20 posts).
Would the roof being so far above the ground cause any top-heavy weight/lean issues?
Best Answer
First big question....Are you planning the floor in the pergola at the level of the deck floor?
Next...
To add bracing under the elevated pergola floor: