Code of Practice v3.0 Online
The NZ Metal Roof and Wall Cladding Code of Practice is a comprehensive design & installation guide, and a recognised related document for Acceptable Solution E2/AS1 of the NZ Building Code.
The relationship between the pitch, fall or rise and the horizontal, is the relationship between the opposite and the adjacent sides of a right angled triangle.
This is known as the tangent of the angle. (tan ɸ) with the opposite side being the rise and the adjacent side the horizontal distance.
Enter any two values on the illustration for live calculations.
°
1 in
18.2A Rafter, Hip and Rise Chart
| Pitch | Rafter length | Hip/Valley Length | Vertical Rise | Valley Angle |
|---|---|---|---|---|
| per metre span | per metre span | per metre span | ||
| 0.5 | 1.000 | 1.414 | 0.009 | 179° |
| 1 | 1.000 | 1.414 | 0.017 | 179° |
| 1.5 | 1.000 | 1.414 | 0.026 | 178° |
| 2 | 1.001 | 1.415 | 0.035 | 177° |
| 3 | 1.001 | 1.415 | 0.052 | 176° |
| 4 | 1.002 | 1.416 | 0.070 | 174° |
| 5 | 1.004 | 1.417 | 0.087 | 173° |
| 6 | 1.006 | 1.418 | 0.105 | 172° |
| 7 | 1.008 | 1.420 | 0.123 | 170° |
| 8 | 1.010 | 1.421 | 0.141 | 169° |
| 9 | 1.012 | 1.423 | 0.158 | 167° |
| 10 | 1.015 | 1.425 | 0.176 | 166° |
| 11 | 1.019 | 1.428 | 0.194 | 164° |
| 12 | 1.022 | 1.430 | 0.213 | 163° |
| 13 | 1.026 | 1.433 | 0.231 | 162° |
| 14 | 1.031 | 1.436 | 0.249 | 160° |
| 15 | 1.035 | 1.439 | 0.268 | 159° |
| 16 | 1.040 | 1.443 | 0.287 | 158° |
| 17 | 1.046 | 1.447 | 0.306 | 156° |
| 18 | 1.051 | 1.451 | 0.325 | 155° |
| 19 | 1.058 | 1.456 | 0.344 | 153° |
| 20 | 1.064 | 1.460 | 0.364 | 152° |
| 21 | 1.071 | 1.465 | 0.384 | 151° |
| 22 | 1.079 | 1.471 | 0.404 | 149° |
| 23 | 1.086 | 1.477 | 0.424 | 148° |
| 24 | 1.095 | 1.483 | 0.445 | 147° |
| 25 | 1.103 | 1.489 | 0.466 | 145° |
| 26 | 1.113 | 1.496 | 0.488 | 144° |
| 27 | 1.122 | 1.503 | 0.510 | 143° |
| 28 | 1.133 | 1.511 | 0.532 | 141° |
| 29 | 1.143 | 1.519 | 0.564 | 140° |
| 30 | 1.155 | 1.528 | 0.577 | 139° |
| 31 | 1.167 | 1.537 | 0.601 | 137° |
| 32 | 1.179 | 1.546 | 0.625 | 136° |
| 33 | 1.192 | 1.556 | 0.649 | 135° |
| 34 | 1.206 | 1.567 | 0.675 | 133° |
| 35 | 1.221 | 1.578 | 0.700 | 132° |
| 36 | 1.236 | 1.590 | 0.727 | 131° |
| 37 | 1.252 | 1.602 | 0.754 | 130° |
| 38 | 1.269 | 1.616 | 0.781 | 128° |
| 39 | 1.287 | 1.630 | 0.810 | 127° |
| 40 | 1.305 | 1.644 | 0.839 | 126° |
| 41 | 1.325 | 1.660 | 0.869 | 125° |
| 42 | 1.346 | 1.677 | 0.900 | 124° |
| 43 | 1.367 | 1.694 | 0.933 | 122° |
| 44 | 1.390 | 1.712 | 0.966 | 121° |
| 45 | 1.414 | 1.732 | 1.000 | 120° |
| 46 | 1.440 | 1.753 | 1.036 | 119° |
| 47 | 1.466 | 1.775 | 1.072 | 118° |
| 48 | 1.494 | 1.798 | 1.111 | 117° |
| 49 | 1.524 | 1.823 | 1.15 | 115° |
| 50 | 1.556 | 1.849 | 1.192 | 114° |
| 51 | 1.589 | 1.877 | 1.235 | 113° |
| 52 | 1.624 | 1.907 | 1.280 | 112° |
| 53 | 1.662 | 1.939 | 1.327 | 111° |
| 54 | 1.701 | 1.973 | 1.376 | 110° |
| 55 | 1.743 | 2.010 | 1.428 | 109° |
| 56 | 1.788 | 2.049 | 1.483 | 108° |
| 57 | 1.836 | 2.091 | 1.540 | 107° |
| 58 | 1.887 | 2.136 | 1.600 | 106° |
| 59 | 1.942 | 2.184 | 1.664 | 105° |
| 60 | 2.000 | 2.236 | 1.732 | 104° |