How To Figure Rafter Length On A Hip Roof

You ll also need to look for a hip roof design calculator to let you work out the height and the overall format of the design ensuring that your calculations are going to allow for the type of design that you were hoping for in the first place.

How to figure rafter length on a hip roof. Rafter length using angle v r 2cos a rafter length using pitch v r 2 sqrt 1 p 2 where v overhang r roof span p pitch use our online rafter length calculator to quickly compute the length of the shed roof rafter by entering the measurements of overhead length of roof span pitch or angle. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Select the following information by using the drop downs to enter values in feet and inches. Typically this is shown on the roof construction plan.

The run of the roof in this example is 12 5 feet and the angle of the roof is 23 degrees so the length of a common rafter is 12 5 cosine 23 degrees 13 6 feet. The other thing you ll need is the roof pitch angle. Determine the direction the rafters rise from opposite outside walls to the ridge. Easy rafters does not calculate a complete four sided hip roof but rather calculates the common hip and jack rafters for one end of a hip roof.

Take the square root of the result from step 6 to obtain the length of the hip rafter. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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. Total span ridge 2 individual rafter span.

Divide the span of the roof by two to obtain the run of the roof. You might need a long tape measure to get the span then. How to calculate rafter lengths. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.

They must must be on the same level. 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. To calculate a hip roof select hip from the roof type dropdown list or click on the corresponding button on the toolbar to calculate a hip roof. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.

Each common rafter span is calculated by subtracting the thickness of the ridge from the total span then dividing the answer by two.