| Height Above PLate Table -- 11 / 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 | 4.75 | 3.37 | 2.91 | 2.46 | 2.00 | 1.88 | 1.54 | 1.08 | 0.05 | -0.29 | -1.44 |
| 2x6 | 7.46 | 6.09 | 5.63 | 5.17 | 4.71 | 4.60 | 4.25 | 3.79 | 2.76 | 2.42 | 1.27 |
| 2x8 | 10.17 | 8.80 | 8.34 | 7.88 | 7.42 | 7.31 | 6.97 | 6.51 | 5.48 | 5.13 | 3.99 |
| 2x10 | 12.89 | 11.51 | 11.05 | 10.60 | 10.14 | 10.02 | 9.68 | 9.22 | 8.19 | 7.85 | 6.70 |
| 2x12 | 15.60 | 14.23 | 13.77 | 13.31 | 12.85 | 12.74 | 12.39 | 11.93 | 10.90 | 10.56 | 9.41 |
| 1 3/4 X 11 7/8 | 16.11 | 14.73 | 14.28 | 13.82 | 13.36 | 13.24 | 12.90 | 12.44 | 11.41 | 11.07 | 9.92 |