| Height Above PLate Table -- 5 / 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 | 3.79 | 3.17 | 2.96 | 2.75 | 2.54 | 2.49 | 2.33 | 2.12 | 1.66 | 1.50 | 0.98 |
| 2x6 | 5.96 | 5.33 | 5.13 | 4.92 | 4.71 | 4.66 | 4.50 | 4.29 | 3.82 | 3.67 | 3.15 |
| 2x8 | 8.12 | 7.50 | 7.29 | 7.08 | 6.88 | 6.82 | 6.67 | 6.46 | 5.99 | 5.83 | 5.31 |
| 2x10 | 10.29 | 9.67 | 9.46 | 9.25 | 9.04 | 8.99 | 8.83 | 8.63 | 8.16 | 8.00 | 7.48 |
| 2x12 | 12.46 | 11.83 | 11.62 | 11.42 | 11.21 | 11.16 | 11.00 | 10.79 | 10.32 | 10.17 | 9.65 |
| 1 3/4 X 11 7/8 | 12.86 | 12.24 | 12.03 | 11.82 | 11.61 | 11.56 | 11.41 | 11.20 | 10.73 | 10.57 | 10.05 |