| Height Above PLate Table -- 6 / 12 | Rafter Seat Cut Length -- Each rows shows seat cut length with H.A.P for material size | ||||||||||
| Material | Plumb height | 1 1/2 | 2 | 2 1/2 | 3 | 3 1/8 | 3 1/2 | 4 | 5 1/8 | 5 1/2 | 6 3/4 |
| 2x4 | 3.91 | 3.16 | 2.91 | 2.66 | 2.41 | 2.35 | 2.16 | 1.91 | 1.35 | 1.16 | 0.54 |
| 2x6 | 6.15 | 5.40 | 5.15 | 4.90 | 4.65 | 4.59 | 4.40 | 4.15 | 3.59 | 3.40 | 2.77 |
| 2x8 | 8.39 | 7.64 | 7.39 | 7.14 | 6.89 | 6.82 | 6.64 | 6.39 | 5.82 | 5.64 | 5.01 |
| 2x10 | 10.62 | 9.87 | 9.62 | 9.37 | 9.12 | 9.06 | 8.87 | 8.62 | 8.06 | 7.87 | 7.25 |
| 2x12 | 12.86 | 12.11 | 11.86 | 11.61 | 11.36 | 11.29 | 11.11 | 10.86 | 10.29 | 10.11 | 9.48 |
| 1 3/4 X 11 7/8 | 13.28 | 12.53 | 12.28 | 12.03 | 11.78 | 11.71 | 11.53 | 11.28 | 10.71 | 10.53 | 9.90 |