Hip Roof Pitch Factors

It is very important to determine the roof pitch factors for designing the roof.

Hip roof pitch factors.

To obtain an accurate roof pitch measurement properly measure the rise and run. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. Modern residential hip roof construction uses common pitch ratios in general. You just have to go online and there you can search this.

This roof slope factor table also consists of hip and valley factors to measure the possible hips and valleys. A hip or a valley is where two roof slopes intersect forming a peak or a depression. The length of the rafters can also be determined while determining the slope. For example a shed has a 3 12 pitch roof with a outside wall dimension of 10 feet.

This article will help you calculate the roof pitch factors. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. The hip and valley factor is a number that is multiplied by the actual run horizontal distance of a common rafter to determine the length of a hip or valley rafter. Then you ll be able to measure slope from an unfinished attic space under the roof.

Repeat the run not the length of a common rafter for precision the thickness of the ridge board and any eave. 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. Length of the rafter.

The steeper your roof pitch heavier it is to your pockets. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. For regular hips and valleys where the roof sections have the same slope and meet to form a 90 degree angle. For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1.

Roofs with hips and valleys have special factors. Valley hip factor. This way the pitch of the roof and the slope of the roof can be measured. You can easily find roof pitch factor chart online from where you can take help in calculating pitch factor for your roof.

The most common hip roof pitch ratios fall between 4 12 and 6 12 although variations occur based on factors such as snow rain and wind conditions which is because steeper hip roof pitch ratios allow for less accumulations of snow and rain on the roof and lower ratios provide less wind resistance.