Framing & Structure Diagrams
6 diagrams · 2 calculators
Stud-wall layout, rough-opening anatomy, advanced corners, and stair rise/run, stringer, and code-comfort geometry — the load-path and layout diagrams every rough carpenter works from.
Calculators in this category
Framing & Structure · 6 diagrams
- Framing & Structure
Stair anatomy — total rise, riser, tread, and run, and how rise sets the number of steps
Total rise (floor to floor) sets everything: risers = ⌈rise ÷ 7¾″⌉, treads = risers − 1, run = treads × tread depth. A 9-ft floor → 15 risers @ 7.2″, 14 treads, 154″ run — and every riser must be equal.
- Framing & Structure
What makes a stair step legal and comfortable — IRC riser/tread limits and the Blondel rule
Code sets the limits — riser ≤ 7¾″, tread ≥ 10″ (11″ with no nosing), nosing ¾–1¼″ — and Blondel’s rule sets comfort: 2R+T = 24–25″ and R+T = 17–18″. A 7″/11″ step hits both. Risers must also vary by ≤ 3⁄8″.
- Framing & Structure
How a cut stair stringer is laid out — framing-square steps, throat depth, and why it shears
Lay out a cut stringer with a framing square (rise on one leg, run on the other), keep the throat ≥ 5″ so it can’t shear at the notch corner, plumb-cut the top to the header, and drop the bottom riser by one tread thickness so all risers stay equal.
- Framing & Structure
How many studs a wall needs — spacing sets the count (length ÷ spacing + 1)
A wall’s base stud count is length ÷ spacing + 1 — the “+1” is the stud that closes the far end. At 16″ on-center a 12-ft wall takes 10 studs. The calculator then adds studs for each corner, T-intersection, and opening.
- Framing & Structure
How a door or window opening is framed — king, jack, header, and cripple studs
Every opening is framed the same way: king studs tie it to the wall, jacks carry the header, and cripples fill above the header and below the window sill. The rough-opening width/height are your inputs; the header size comes from the IRC R602.7 table.
- Framing & Structure
Conventional vs. advanced framing at a corner — 3-stud corner versus 2-stud plus drywall clip
Both corners meet code. A conventional 3-stud corner fills the corner with solid wood (a thermal bridge); an advanced-framing 2-stud corner plus a drywall clip leaves the cavity open for insulation and uses fewer studs. The calculator’s “Advanced framing” option counts the 2-stud version.