Not just decking: the whole structure. Boards, joists, beams, posts, footings and hardware from two dimensions.
| Material | Qty |
|---|---|
| Deck boards (5/4 × 6) | |
| Joists (2×8, 16″ o.c.) | |
| Beams (doubled 2×8) | |
| Posts (6×6) + post bases | |
| Footing concrete (80-lb bags) | |
| Ledger board + flashing | |
| Joist hangers | |
| Deck screws | |
| Railing (rails + balusters) |
Planning estimate for a standard attached rectangular deck: joists at 16″ o.c., beam lines roughly every 9 ft of width, posts at 6 ft max spacing, footings figured as 12″-diameter × 36″ holes. Your permit office's span tables govern — spans shrink fast with composite decking at diagonal patterns (12″ o.c.).
| Item | Qty |
|---|---|
| Deck boards | |
| 2×8 joists + rim | |
| 2×8 beam stock (doubled) | |
| 6×6 posts, post bases, caps | |
| Concrete 80-lb bags + footing tubes | |
| Ledger: board, flashing, lag screws | |
| Hangers, hurricane ties, structural screws | |
| Deck screws (coated / stainless near salt water) |
Decking: each 5/4×6 board covers 5¾″ of width (5½″ board + ¼″ gap), so rows = width ÷ 5¾″, times the length, plus 10% for cuts and culls. Framing is figured from standard practice — 16″ joist spacing, doubled-2×8 beams on roughly 9-ft centers, 6×6 posts at 6-ft maximum spacing. It won't replace an engineer's plan for a hot-tub deck or a second story, and it doesn't pretend to.
For estimation only. Deck design is code- and span-table-driven — have the framing plan checked against your local code before building.