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Wall Framing worksheet

Grades 4–5 · CCSS 4.OA.A.3

Solve each problem and show your work. Round answers to 2 decimal places where needed.

1.
Problem 1.
- Wall length: 20 ft
- Framed wall height (bottom of sole plate to top of top plates): 8 ft
- Stud spacing (on center): 19.2 in
- Doors and windows in the wall: 3
- Average rough opening width: 28 in
- Extra studs per opening: 2
- Corners and wall intersections along this wall: 1
- Length of plate lumber: 18 ft
- Extra studs for bad boards and mistakes: 10%
Find: Studs to buy
Answer
2.
Problem 2.
- Wall length: 24 ft
- Framed wall height (bottom of sole plate to top of top plates): 7 ft
- Stud spacing (on center): 12 in
- Doors and windows in the wall: 2
- Average rough opening width: 30 in
- Extra studs per opening: 2
- Corners and wall intersections along this wall: 0
- Length of plate lumber: 15 ft
- Extra studs for bad boards and mistakes: 14%
Find: Studs to buy
Answer
3.
Problem 3.
- Wall length: 16 ft
- Framed wall height (bottom of sole plate to top of top plates): 11 ft
- Stud spacing (on center): 24 in
- Doors and windows in the wall: 2
- Average rough opening width: 36 in
- Extra studs per opening: 2
- Corners and wall intersections along this wall: 0
- Length of plate lumber: 18 ft
- Extra studs for bad boards and mistakes: 10%
Find: Studs to buy
Answer
4.
Problem 4.
- Wall length: 20 ft
- Framed wall height (bottom of sole plate to top of top plates): 5 ft
- Stud spacing (on center): 12 in
- Doors and windows in the wall: 2
- Average rough opening width: 34 in
- Extra studs per opening: 2
- Corners and wall intersections along this wall: 3
- Length of plate lumber: 19 ft
- Extra studs for bad boards and mistakes: 12%
Find: Studs to buy
Answer
5.
Problem 5.
- Wall length: 14 ft
- Framed wall height (bottom of sole plate to top of top plates): 8 ft
- Stud spacing (on center): 12 in
- Doors and windows in the wall: 3
- Average rough opening width: 28 in
- Extra studs per opening: 3
- Corners and wall intersections along this wall: 1
- Length of plate lumber: 16 ft
- Extra studs for bad boards and mistakes: 12%
Find: Studs to buy
Answer
6.
Problem 6.
- Wall length: 18 ft
- Framed wall height (bottom of sole plate to top of top plates): 8 ft
- Stud spacing (on center): 16 in
- Doors and windows in the wall: 2
- Average rough opening width: 42 in
- Extra studs per opening: 2
- Corners and wall intersections along this wall: 0
- Length of plate lumber: 15 ft
- Extra studs for bad boards and mistakes: 11%
Find: Studs to buy
Answer
7.
Problem 7.
- Wall length: 22 ft
- Framed wall height (bottom of sole plate to top of top plates): 7 ft
- Stud spacing (on center): 19.2 in
- Doors and windows in the wall: 2
- Average rough opening width: 44 in
- Extra studs per opening: 2
- Corners and wall intersections along this wall: 0
- Length of plate lumber: 15 ft
- Extra studs for bad boards and mistakes: 13%
Find: Studs to buy
Answer
8.
Problem 8.
- Wall length: 16 ft
- Framed wall height (bottom of sole plate to top of top plates): 6 ft
- Stud spacing (on center): 12 in
- Doors and windows in the wall: 2
- Average rough opening width: 47 in
- Extra studs per opening: 2
- Corners and wall intersections along this wall: 0
- Length of plate lumber: 14 ft
- Extra studs for bad boards and mistakes: 9%
Find: Studs to buy
Answer
9.
Problem 9.
- Wall length: 24 ft
- Framed wall height (bottom of sole plate to top of top plates): 7 ft
- Stud spacing (on center): 19.2 in
- Doors and windows in the wall: 2
- Average rough opening width: 36 in
- Extra studs per opening: 3
- Corners and wall intersections along this wall: 0
- Length of plate lumber: 15 ft
- Extra studs for bad boards and mistakes: 11%
Find: Studs to buy
Answer
10.
Problem 10.
- Wall length: 18 ft
- Framed wall height (bottom of sole plate to top of top plates): 6 ft
- Stud spacing (on center): 19.2 in
- Doors and windows in the wall: 2
- Average rough opening width: 40 in
- Extra studs per opening: 3
- Corners and wall intersections along this wall: 0
- Length of plate lumber: 18 ft
- Extra studs for bad boards and mistakes: 11%
Find: Studs to buy
Answer

Answer key: Wall Framing worksheet

1. Studs to buy: 25
1. Count the spaces: wall length in inches ÷ 19.2 in, rounded up so a short last space still gets a stud
  $\frac{240}{19.2}$ $= 12.5$ $= rounded up: 13$
2. Add 1 to the spaces, because one more stud closes the far end
  $13 + 1$ $= 14$
3. Add 2 per door or window and 2 per corner or meeting wall, since these need extra support
  $14 + 3 \times 2 + 1 \times 2$ $= 22$
4. Add 10% extra for warped or split boards, then round up
  $22 \times 1.1$ $= 24.2$ $= rounded up: 25$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 18 ft boards
  $\frac{3 \times 20}{18}$ $= 3.3333$ $= rounded up: 4$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{3 \times 2 \times (28 + 3)}{12}$ $= 15.5 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $8 \times 12 - 3 \times 1.5$ $= 91.5 in$
2. Studs to buy: 34
1. Count the spaces: wall length in inches ÷ 12 in, rounded up so a short last space still gets a stud
  $\frac{288}{12}$ $= 24$ $= rounded up: 24$
2. Add 1 to the spaces, because one more stud closes the far end
  $24 + 1$ $= 25$
3. Add 2 per door or window and 2 per corner or meeting wall, since these need extra support
  $25 + 2 \times 2 + 0 \times 2$ $= 29$
4. Add 14% extra for warped or split boards, then round up
  $29 \times 1.14$ $= 33.06$ $= rounded up: 34$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 15 ft boards
  $\frac{3 \times 24}{15}$ $= 4.8$ $= rounded up: 5$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{2 \times 2 \times (30 + 3)}{12}$ $= 11 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $7 \times 12 - 3 \times 1.5$ $= 79.5 in$
3. Studs to buy: 15
1. Count the spaces: wall length in inches ÷ 24 in, rounded up so a short last space still gets a stud
  $\frac{192}{24}$ $= 8$ $= rounded up: 8$
2. Add 1 to the spaces, because one more stud closes the far end
  $8 + 1$ $= 9$
3. Add 2 per door or window and 2 per corner or meeting wall, since these need extra support
  $9 + 2 \times 2 + 0 \times 2$ $= 13$
4. Add 10% extra for warped or split boards, then round up
  $13 \times 1.1$ $= 14.3$ $= rounded up: 15$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 18 ft boards
  $\frac{3 \times 16}{18}$ $= 2.6667$ $= rounded up: 3$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{2 \times 2 \times (36 + 3)}{12}$ $= 13 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $11 \times 12 - 3 \times 1.5$ $= 127.5 in$
4. Studs to buy: 35
1. Count the spaces: wall length in inches ÷ 12 in, rounded up so a short last space still gets a stud
  $\frac{240}{12}$ $= 20$ $= rounded up: 20$
2. Add 1 to the spaces, because one more stud closes the far end
  $20 + 1$ $= 21$
3. Add 2 per door or window and 2 per corner or meeting wall, since these need extra support
  $21 + 2 \times 2 + 3 \times 2$ $= 31$
4. Add 12% extra for warped or split boards, then round up
  $31 \times 1.12$ $= 34.72$ $= rounded up: 35$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 19 ft boards
  $\frac{3 \times 20}{19}$ $= 3.1579$ $= rounded up: 4$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{2 \times 2 \times (34 + 3)}{12}$ $= 12.3333 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $5 \times 12 - 3 \times 1.5$ $= 55.5 in$
5. Studs to buy: 30
1. Count the spaces: wall length in inches ÷ 12 in, rounded up so a short last space still gets a stud
  $\frac{168}{12}$ $= 14$ $= rounded up: 14$
2. Add 1 to the spaces, because one more stud closes the far end
  $14 + 1$ $= 15$
3. Add 3 per door or window and 2 per corner or meeting wall, since these need extra support
  $15 + 3 \times 3 + 1 \times 2$ $= 26$
4. Add 12% extra for warped or split boards, then round up
  $26 \times 1.12$ $= 29.12$ $= rounded up: 30$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 16 ft boards
  $\frac{3 \times 14}{16}$ $= 2.625$ $= rounded up: 3$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{3 \times 2 \times (28 + 3)}{12}$ $= 15.5 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $8 \times 12 - 3 \times 1.5$ $= 91.5 in$
6. Studs to buy: 22
1. Count the spaces: wall length in inches ÷ 16 in, rounded up so a short last space still gets a stud
  $\frac{216}{16}$ $= 13.5$ $= rounded up: 14$
2. Add 1 to the spaces, because one more stud closes the far end
  $14 + 1$ $= 15$
3. Add 2 per door or window and 2 per corner or meeting wall, since these need extra support
  $15 + 2 \times 2 + 0 \times 2$ $= 19$
4. Add 11% extra for warped or split boards, then round up
  $19 \times 1.11$ $= 21.09$ $= rounded up: 22$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 15 ft boards
  $\frac{3 \times 18}{15}$ $= 3.6$ $= rounded up: 4$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{2 \times 2 \times (42 + 3)}{12}$ $= 15 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $8 \times 12 - 3 \times 1.5$ $= 91.5 in$
7. Studs to buy: 22
1. Count the spaces: wall length in inches ÷ 19.2 in, rounded up so a short last space still gets a stud
  $\frac{264}{19.2}$ $= 13.75$ $= rounded up: 14$
2. Add 1 to the spaces, because one more stud closes the far end
  $14 + 1$ $= 15$
3. Add 2 per door or window and 2 per corner or meeting wall, since these need extra support
  $15 + 2 \times 2 + 0 \times 2$ $= 19$
4. Add 13% extra for warped or split boards, then round up
  $19 \times 1.13$ $= 21.47$ $= rounded up: 22$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 15 ft boards
  $\frac{3 \times 22}{15}$ $= 4.4$ $= rounded up: 5$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{2 \times 2 \times (44 + 3)}{12}$ $= 15.6667 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $7 \times 12 - 3 \times 1.5$ $= 79.5 in$
8. Studs to buy: 23
1. Count the spaces: wall length in inches ÷ 12 in, rounded up so a short last space still gets a stud
  $\frac{192}{12}$ $= 16$ $= rounded up: 16$
2. Add 1 to the spaces, because one more stud closes the far end
  $16 + 1$ $= 17$
3. Add 2 per door or window and 2 per corner or meeting wall, since these need extra support
  $17 + 2 \times 2 + 0 \times 2$ $= 21$
4. Add 9% extra for warped or split boards, then round up
  $21 \times 1.09$ $= 22.89$ $= rounded up: 23$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 14 ft boards
  $\frac{3 \times 16}{14}$ $= 3.4286$ $= rounded up: 4$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{2 \times 2 \times (47 + 3)}{12}$ $= 16.6667 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $6 \times 12 - 3 \times 1.5$ $= 67.5 in$
9. Studs to buy: 25
1. Count the spaces: wall length in inches ÷ 19.2 in, rounded up so a short last space still gets a stud
  $\frac{288}{19.2}$ $= 15$ $= rounded up: 15$
2. Add 1 to the spaces, because one more stud closes the far end
  $15 + 1$ $= 16$
3. Add 3 per door or window and 2 per corner or meeting wall, since these need extra support
  $16 + 2 \times 3 + 0 \times 2$ $= 22$
4. Add 11% extra for warped or split boards, then round up
  $22 \times 1.11$ $= 24.42$ $= rounded up: 25$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 15 ft boards
  $\frac{3 \times 24}{15}$ $= 4.8$ $= rounded up: 5$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{2 \times 2 \times (36 + 3)}{12}$ $= 13 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $7 \times 12 - 3 \times 1.5$ $= 79.5 in$
10. Studs to buy: 22
1. Count the spaces: wall length in inches ÷ 19.2 in, rounded up so a short last space still gets a stud
  $\frac{216}{19.2}$ $= 11.25$ $= rounded up: 12$
2. Add 1 to the spaces, because one more stud closes the far end
  $12 + 1$ $= 13$
3. Add 3 per door or window and 2 per corner or meeting wall, since these need extra support
  $13 + 2 \times 3 + 0 \times 2$ $= 19$
4. Add 11% extra for warped or split boards, then round up
  $19 \times 1.11$ $= 21.09$ $= rounded up: 22$
5. Plates: one bottom and a doubled top run the full wall, so 3 × the wall length, in 18 ft boards
  $\frac{3 \times 18}{18}$ $= 3$ $= rounded up: 3$
6. Headers: two boards per opening, each 3 in longer than the opening so it rests on the jack studs
  $\frac{2 \times 2 \times (40 + 3)}{12}$ $= 14.3333 ft$
7. Cut the studs shorter than the wall, because the 3 plates take 1.5 in each
  $6 \times 12 - 3 \times 1.5$ $= 67.5 in$