How To Build Hip Roof With Enequal Wall 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 enequal wall lengths.

Place the 4 6 common rafters in their designated positions along the 2 longest walls and nail them firmly to the wall with a nail gun. With your square set on the main roof side of the hip rafter step off the true run of the first hip jack using the pitch of the main roof hip 8 15 5 8. Mark the length of the hip measuring down from the longest point of the plumb cut. The typical gable roof diagram above shows the r length measured from the outside wall to the middle of the ridge beam the rafter section diagram below typical of a shed or patio cover roof shows the r length measured from the outside wall to the outside face of the ridge beam either one is acceptable depending on which type of roof you are building but if you are using the.

Lengths of hip and valley jacks are determined as in. This is the centerline of the first jack. Attach 4 6 centering rafters and lift the ridge beam into place. How to use the hip roof framing calculator.

Mark a plumb line. All formulae are below the calculator. The amount to be removed from each side must be separately determined according to the angle the hip makes with the plate. Select the following information by using the drop downs to enter values in feet and inches.

The backing of hips on roofs of uneven pitches while the amount to be removed on each side of the hip will vary is determined by the principles developed in sec. The hip end jacks tab displays a dimensioned side view and top view of the hip roof jack rafters for the hip end side of the hip rafter on an irregular hip roof. 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. That is where the seat cut should be made.

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. 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 get results you need to provide roof base dimensions length and width and roof pitch we assume it is identical for all sides. Then measure down that plumb cut the same distance as the common rafter s height above plate.

For each successive jack rafter step off the common difference.