| Height Above PLate Table -- 12 / 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 | 4.95 | 3.45 | 2.95 | 2.45 | 1.95 | 1.82 | 1.45 | 0.95 | -0.18 | -0.55 | -1.80 |
| 2x6 | 7.78 | 6.28 | 5.78 | 5.28 | 4.78 | 4.65 | 4.28 | 3.78 | 2.65 | 2.28 | 1.03 |
| 2x8 | 10.61 | 9.11 | 8.61 | 8.11 | 7.61 | 7.48 | 7.11 | 6.61 | 5.48 | 5.11 | 3.86 |
| 2x10 | 13.44 | 11.94 | 11.44 | 10.94 | 10.44 | 10.31 | 9.94 | 9.44 | 8.31 | 7.94 | 6.69 |
| 2x12 | 16.26 | 14.76 | 14.26 | 13.76 | 13.26 | 13.14 | 12.76 | 12.26 | 11.14 | 10.76 | 9.51 |
| 1 3/4 X 11 7/8 | 16.79 | 15.29 | 14.79 | 14.29 | 13.79 | 13.67 | 13.29 | 12.79 | 11.67 | 11.29 | 10.04 |