How To Build Hip Roof With Unequal Span Lengths

The hip roof framing calculator returns the value of the main rafter the side rafter the length of the hip the height of the knee wall and the lengths of the jack rafters.

How to build hip roof with unequal span lengths. Attach 4 6 centering rafters and lift the ridge beam into place. Make a duplicate rafter from the pattern. The first step in the process of erecting the hip roof is to get the ridge beam into place at the top of the roof. Place your square on the side of the hip rafter that will face the main roof using the hip pitch for that roof 8 155 8.

After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. To calculate the length of a ridge in a hipped roof you simply subtract the width away from the length. Span for the main rafters measure from outside of wall to outside of wall. Importantly though you must add the thickness of the ridge back on to that measurement so we can use the same common rafters already measured we ve removed the 50mm purple ridge from above so need to now add 50mm on to the new longer ridge.

Measure to make sure the rise run and span are correct. 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. Major side roof span building width ridge thickness 2. Repeat the same procedure on the side of the hip that faces the secondary roof using the hip pitch for that roof and measuring distance b.

Major side plan angle. Select the following information by using the drop downs to enter values in feet and inches. Hip backing angle 15 4 for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. Measure distance a along the unit run and mark.

Major side roof pitch major. This is the line of backing. Minor side roof pitch minor. Then lay the rafters out on a smooth flat surface with a 2 by between them at the ridge line.

There are lots of things to think about and consider when taking on a hip roof style so having a reliable all in one hip roof calculator is going to be very useful for this job.