How To Work Out Angles On Hip Roof

Mark the end plumb cut angle line back from square on both sides of the hip.

How to work out angles on hip roof.

This calculator will help you estimate hip roof parameters including rafters and roof area person outline anton schedule 2011 08 29 17 53 20 one of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area. Rafter height width from pythagoras remember that at school so. This is the pointy end. This is the line to cut.

Measure back from this line and mark a second parallel line on both sides of the hip. This is the pointy end of. Using these angle definitions i will derive formulas for the sheathing θ s and hip pitch angle θ h given the common pitch angle which i call the roof pitch θ r and plan angle θ p. To derive formulas for the critical angles we need to define some terms which i do in figure 2.

If you prefer to work the angle out the traditional way without our handy calculator you can use the following equations to find the length of the rafter and the slope. To mark and cut hip plumb and side cuts with a circular saw print a paper template easy accurate or. Finally you can find the roof pitch in the form of x 12. The angle of your roof is calculated the same way you d work the angle of a right angled triangle.

Measure back 25 from this line and mark a second parallel line on both sides of the hip. If the roof has a triangular shape stretch your tape measure along the bottom edge then measure from the peak point down to the center of the bottom edge. The green arrows above show every side is equal we ll assume 2 metres for this example. Set circular saw blade tilt angle to 45 cut 1 side.

Recalculate this value into an angle. This is the line to cut along. Angle arctan pitch arctan 0 25 14. For trapezoidal roofs measure the bottom edge the top edge also known as the ridge and the distance between the 2 edges.

The hips are in red common rafters yellow and for hips to work on a square roof like above each member is equal. Every common rafter is the same length brown and each hip rafter is the same length too red. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. Next you will want to look for a hip roof angle calculator so that you can make sure all of your precision detailing for the roof itself is going to be.

Pitch rise run 1 5 6 25. Don t cut yet 2.