When this deck is in daily use, it should work as a sheltered outdoor room: a covered deck under a single-pitch roof tied into a dark green house, with the frame reaching out over part of the driveway as well. The shingled roof sits at just over 2.5/12, staying within the shingles' limits, and the ceiling height comes in near 7.5 feet.
For a first project at this scale, the structure reads serious. A three-ply 2x12 beam, screwed and glued, clears a 14 foot span inside to inside on four posts set on concrete piers with metal brackets. Footings went down 30 inches, past the 18 inch frost line and beyond the 24 inch code minimum. The joist frame is pressure-treated lumber with a double rim joist, corner joists rest on metal post base brackets in concrete footings, and the rafters are 2x10s running from the house eaves to the front beam.
The airflow details stand out to me: the 5/4 deck boards carry gaps for air movement, and the step risers sit on 1x2 PVC with periodic gaps too. The maker aimed to overbuild wherever reasonably possible, and a beam like that seems to back that up. During construction, OSB panels with teal edge sealant covered the joists, posts were stood up wet and heavy then cut to length in place, and a temporary 2x8 on the ground held the joists until the double rim joist was tied to the posts.
The open tradeoff is the overhang. Pitch above 2/12 was prioritized over a longer overhang, and a rafter length miscalculation left only 1 foot past the beam, so blowing rain reaches the deck more than expected. Under-deck moisture venting was not planned as well as hoped, and whether repairs will be needed is still an open question. Even so, the maker is really pleased and expects the build to outlive them.