| Height Above PLate Table -- 9 / 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 | 4.38 | 3.25 | 2.88 | 2.50 | 2.12 | 2.03 | 1.75 | 1.38 | 0.53 | 0.25 | -0.69 |
| 2x6 | 6.88 | 5.75 | 5.38 | 5.00 | 4.62 | 4.53 | 4.25 | 3.88 | 3.03 | 2.75 | 1.81 |
| 2x8 | 9.38 | 8.25 | 7.88 | 7.50 | 7.12 | 7.03 | 6.75 | 6.38 | 5.53 | 5.25 | 4.31 |
| 2x10 | 11.88 | 10.75 | 10.38 | 10.00 | 9.62 | 9.53 | 9.25 | 8.88 | 8.03 | 7.75 | 6.81 |
| 2x12 | 14.38 | 13.25 | 12.88 | 12.50 | 12.12 | 12.03 | 11.75 | 11.38 | 10.53 | 10.25 | 9.31 |
| 1 3/4 X 11 7/8 | 14.84 | 13.72 | 13.34 | 12.97 | 12.59 | 12.50 | 12.22 | 11.84 | 11.00 | 10.72 | 9.78 |