Sheet set S · Structural
Framing
Studs, headers, sheathing, rafters and board feet.
Issued
3 of 3Wall Framing Calculator
Studs, plates, headers, cripples and sheathing for a stud wall, with each door and window laid out from its own rough-opening width and position, and the wall elevation redrawn from what you typed.
Open sheet → S-203Rafter Calculator
Common rafter length with the ridge board deducted, the plumb, seat and birdsmouth cuts with the height above plate, the rafter count, the stock to buy, and hips, valleys and jacks on a hip roof.
Open sheet → S-201Board Foot Calculator
Board feet for up to four lumber sizes on one order, with the whole-board-foot order quantity, lineal feet, pieces, cost per board foot and per 1,000, an optional nominal-versus-dressed volume, and the piece redrawn from what you typed.
Open sheet →Quick reference
| Wall length | 12 in o.c. | 16 in o.c. | 19.2 in o.c. | 24 in o.c. |
|---|---|---|---|---|
| 8 ft | 9 | 7 | 6 | 5 |
| 10 ft | 11 | 9 | 8 | 6 |
| 12 ft | 13 | 10 | 9 | 7 |
| 16 ft | 17 | 13 | 11 | 9 |
| 20 ft | 21 | 16 | 14 | 11 |
| 24 ft | 25 | 19 | 16 | 13 |
Every cell is the same arithmetic the sheet does: one stud on each layout line from the left end, plus the end stud, rounded up. A 12 ft wall at 16 in on center is 144 over 16, nine bays, ten studs. What the table cannot show is the part that changes the order — corners, walls butting in, and the kings, jacks and cripples each door and window brings with it. That is what sheet S-202 counts, against 2 documents: APA’s description of conventional and advanced framing, and the code section that sends stud size, height and spacing to a table this site links rather than reprints. No precut length, no waste default and no price are built in: nothing we opened publishes one.