Layout is from the center of the first common rafter.
Roof hip length.
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.
So this is the measurement to the center of the first common rafter.
In the example at left the run is 10.
First subtract 1 1 5 inches 2 5 3 8 cm from the width measurement you just took to account for the thickness of the ridge board which will span the length of the roof between the individual rafters.