How this particular wall divides
The 3 columns leave 2 interior gaps. The two side margins use 16 inches and the gaps use 8 inches, leaving 96 inches for the frame outlines. Dividing that space by 3 gives an outer box width of 32 in (≈ 32″).
Height = (96 − 2 × 10 − 1 × 5) / 2 = 35.5 in
The two rows are separated by 5 inches of clear wall. Each row starts from its own top mark in the table; keep the gap outside both trim outlines. The top and bottom margins are each 10 inches. The frames are taller than they are wide, with an outer height-to-width ratio of 1.109. Use these proportions as a tape mock-up, rather than assuming they suit the furniture on your wall.
Centerline and boundary checks
The middle column is centered on the wall; its outer edges sit equally far from the centerline. The first outer left edge is 8 in (≈ 8″). The last column starts at 80 in (≈ 80″) and ends at 112 in (≈ 112″), leaving the intended 8-inch right margin. The final row ends at 86 in (≈ 86″). Check these far edges from the same origin you used for the first box.
The 1.25-inch face width reduces each inner dimension by 2.5 inches. That leaves 29.5 in (≈ 29 1/2″) by 33 in (≈ 33″) of exposed wall within each outline. The listed cut lengths still use the outside long points. If you want a particular inner opening instead, account for both sides of the profile when you revise the outer geometry.
What the material count means here
This layout needs 12 horizontal pieces at 32 in (≈ 32″) and 12 vertical pieces at 35.5 in (≈ 35 1/2″). There are 24 individual pieces, each with two 45-degree ends. Their combined finished long-point length is 810 inches, or 67.5 feet. The 10% linear allowance adds 81 inches to that budget and produces a 10-stick length estimate.
The longest piece is 35.5 in (≈ 35 1/2″). With a 0.125 in (≈ 1/8″) blade and 0.354 in (≈ 3/8″) reserved for the two 45-degree cuts on each piece, the longest-first cutting plan uses 12 working sticks, leaving 333.515 inches of combined tails after kerf. Those tails may be several separate pieces and cannot be treated as one long board. The combined purchase figure is 12 8ft sticks. Turning off the 10% allowance changes the linear figure to 9 sticks and the combined purchase figure to 12; the working plan still controls the purchase because whole pieces must fit.
Two alternatives worth taping on the wall
Adding one column gives 4 across and 8 frames in total. With the same margins and gaps, each becomes 23 in (≈ 23″) wide by 35.5 in (≈ 35 1/2″) high. The finished material total changes to 78 feet, and its combined 8ft purchase estimate is 11 sticks. More columns make narrower panels while adding vertical sides; they do not simply divide the current cut list into smaller pieces.
Keeping the current counts and making each side margin one inch larger changes the outer width to 31.333 in (≈ 31 5/16″), a reduction of 0.667 in (≈ 11/16″) per frame. Its left outer edge shifts to 9 inches. The height stays at 35.5 in (≈ 35 1/2″) and the total becomes 66.833 feet. This option gives the wall edges more breathing room without moving the top and bottom boundaries.
Before using this cut list
These are calculated examples, not measured installations. Confirm the full 120 × 96 inch area, the actual trim face width, and the locations of cover plates or casing. Mark one frame, dry-fit its corners, and confirm its outer size before cutting the rest. Fractions are rounded display values; use the independent marks in the table so small rounding differences do not collect at the far margin. The stock plan assumes clean 96-inch sticks and the entered kerf. Allow separately for defective ends or additional practice pieces.
Other layouts for this wall width
- 10ft × 9ft wall · 2 columns, 1 rows52.5 × 92 in outer boxes
- 10ft × 7ft wall · 2 columns, 2 rows52 × 31.5 in outer boxes
- 10ft × 7ft wall · 3 columns, 1 rows32.667 × 64 in outer boxes
- 10ft × 8ft wall · 4 columns, 1 rows25.75 × 84 in outer boxes
- 10ft × 9ft wall · 4 columns, 2 rows25 × 45.5 in outer boxes
Read the full method and common mistakes or compare all 36 worked layouts.