Feet the area of a hip roof equals the area of a gable roof with the same dimensions.
Hip roof slope factor.
The length of the rafters can also be determined while determining the slope.
Valley hip factor.
Valley hip factor.
Charts are helpful because the factors for hips and valleys are listed which is useful for cutting rafters on the hip or valley.
The angle at which the roof plane rises will account for a consistent height in inches above the 12 inch horizontal line and is described as the nominator of the pitch calculation ratio.
The roof pitch factor is also used to calculate the length of common rafters.
The higher the slope the steeper it is.
A hip or a valley is where two roof slopes intersect forming a peak or a depression.
Multiply the roof length by the gable wall length 40 24 960 multiply this amount by the slope factor 960 1 1180 1073 28 the area of this roof 1073 3 sq.
Reading the chart the factor for 3 12 is 1 4362.
Length of the rafter.
All formulae are below the calculator.
In that case the multiplier is multiplied by the run of the rafter the horizontal distance that will be covered by the rafter.
For example a shed has a 3 12 pitch roof with a outside wall dimension of 10 feet.
This way the pitch of the roof and the slope of the roof can be measured.
A roof pitch of 4 in 12 4 12 has a rise of 4 and a run of 12.
For any roof slope expressed as x in 12 rise in run the hip and valley factor is determined by finding the square root of rise run 2.
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.
Once you ve figured out the pitch of your roof you can consult the following chart to discover the slope factor and hip valley factor.
Download the slope chart pdf.
This roof slope factor table also consists of hip and valley factors to measure the possible hips and valleys.
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.
One expression of a hip roof pitch based on this formula would be 4 12 meaning a 4 inch vertical rise for every 12 horizontal inches.
Divide the rise by the run the run is 12.
The hip and valley factor varies according to the slope of the roof as shown in the table below.
The slope of the roof provides the rise and the run to be plugged into the equation.
