| Height Above PLate Table -- 4 / 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 | 3.69 | 3.19 | 3.02 | 2.86 | 2.69 | 2.65 | 2.52 | 2.36 | 1.98 | 1.86 | 1.44 |
| 2x6 | 5.80 | 5.30 | 5.13 | 4.96 | 4.80 | 4.76 | 4.63 | 4.46 | 4.09 | 3.96 | 3.55 |
| 2x8 | 7.91 | 7.41 | 7.24 | 7.07 | 6.91 | 6.86 | 6.74 | 6.57 | 6.20 | 6.07 | 5.66 |
| 2x10 | 10.01 | 9.51 | 9.35 | 9.18 | 9.01 | 8.97 | 8.85 | 8.68 | 8.31 | 8.18 | 7.76 |
| 2x12 | 12.12 | 11.62 | 11.46 | 11.29 | 11.12 | 11.08 | 10.96 | 10.79 | 10.41 | 10.29 | 9.87 |
| 1 3/4 X 11 7/8 | 12.52 | 12.02 | 11.85 | 11.68 | 11.52 | 11.48 | 11.35 | 11.18 | 10.81 | 10.68 | 10.27 |