| Height Above PLate Table -- 10 / 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 | 4.56 | 3.31 | 2.89 | 2.47 | 2.06 | 1.95 | 1.64 | 1.22 | 0.29 | -0.03 | -1.07 |
| 2x6 | 7.16 | 5.91 | 5.49 | 5.08 | 4.66 | 4.56 | 4.24 | 3.83 | 2.89 | 2.58 | 1.53 |
| 2x8 | 9.76 | 8.51 | 8.10 | 7.68 | 7.26 | 7.16 | 6.85 | 6.43 | 5.49 | 5.18 | 4.14 |
| 2x10 | 12.37 | 11.12 | 10.70 | 10.28 | 9.87 | 9.76 | 9.45 | 9.03 | 8.10 | 7.78 | 6.74 |
| 2x12 | 14.97 | 13.72 | 13.30 | 12.89 | 12.47 | 12.37 | 12.05 | 11.64 | 10.70 | 10.39 | 9.34 |
| 1 3/4 X 11 7/8 | 15.46 | 14.21 | 13.79 | 13.37 | 12.96 | 12.85 | 12.54 | 12.12 | 11.19 | 10.87 | 9.83 |