I looked a deck job the other day that involved an octagon section. This section will be two steps lower than the main deck, so I’ve been treating it like a separate deck.
I wanted to minimize the number of piers/posts, so I came up with a design that involves a center post and four beams. The octagon section is 10′ x 10′, and the decking is to be mitered so to create 8 pieces of pie. Because of the decking detail I plan to double the joists and then fill in between . the center post will sit on a 12″ pier, and I may look into one of those Big Foot footers.
I’m posting a drawing of the proposed plan. Any comments or experiences with framing this would be appreciated.
Dave Otto — Otto Construction — PA