Sheet set A · Architectural
Decks & Fences
Joists, decking, posts, pickets and footings.
Issued
3 of 3Deck Calculator
Decking boards, joists, rim and ledger, beams, posts and footing concrete in one takeoff, with the gap and the 45 degree layout computed and the framing plan redrawn from what you typed.
Open sheet → A-302Fence Calculator
Posts by type, rails, pickets, gates and post-hole concrete from one line: gate openings come off first, corners divide the run, and the hole is counted less the post standing in it.
Open sheet → A-303Chain Link Fence Calculator
Chain link fence materials by stretch: fabric rolls, line and terminal posts with their cut lengths, tension bands per hook-up, tie wires, top rail and post-hole concrete, priced at your own figures.
Open sheet →Quick reference
| Deck depth | 5.5 in · 3/16 in gap | 5.5 in · 3/8 in gap | 3.5 in · 3/16 in gap |
|---|---|---|---|
| 8 ft | 17 | 17 | 27 |
| 10 ft | 22 | 21 | 33 |
| 12 ft | 26 | 25 | 40 |
| 14 ft | 30 | 29 | 46 |
| 16 ft | 34 | 33 | 53 |
| 20 ft | 43 | 41 | 66 |
Every cell is the same division the sheet does: the depth plus one gap, over the board pitch, rounded up, with the last row ripped narrow. The widths are the minimum dressed dry sizes of a nominal 6 and a nominal 4 in NIST PS 20-25; the gaps are what Trex asks for on its own boards, 3/16 in as a minimum and 3/8 in in heavily wooded areas. Your board carries its own width and its own gapping, which is why both are fields rather than constants. What the table cannot show is the part that decides the order — the stock length the rows are cut from, a 45 degree layout, the joists, beams, posts and footing concrete underneath. That is what sheet A-301 counts, against 5 documents. No span, no waste default and no price are built in: span tables belong to DCA 6 and your local code, and no open source for a decking waste percentage was found.