WEB-206 April 2020 Tread Joist Rail Post Decking Top Rail Baluster Bottom Rail Concrete Footing Ledger Board Beam Head Joist Post Stringer Anatomy of a Deck Ledgers anchor an attached deck to a house. Ledgers sup- port one end of all joists. Concrete footings with post anchors support the weight of the deck and hold the deck posts in place. They are made by pouring concrete into tube forms. Local climates and building codes determine depth of footings. Post anchors should be made of galvanized steel to resist corrosion. Posts transfer the weight of the deck to the footings. They are attached to the post anchors with galvanized nails. Beams provide the main structural support for the deck. A beam is usually made from a pair of 2 x 8s or 2 x 10 fastened to the deck posts. Joists support the decking. For an attached deck, the joists are fastened at one end to the ledger, and at the other end to the header joist. The outside joists can be covered with redwood or cedar facing boards for a more finished appearance. Decking is the main feature of any deck. The decking boards are attached to the joists with galvanized screws, nails, or hidden fasteners. Railing parts include railing posts and balusters, a horizontal rail, and a cap. Building codes may require railings on decks 24” or more above ground level. A stairway is made from two or more stringers fastened to the side of the deck, and a series of treads attached to the stringers with metal cleats.