Roof Slope Factor Table

Roof slope pitch rise run typw walkability table.

Roof slope factor table.

Here are the steps to assist you so that you can do it all by yourself. Take a ladder and reach to the top of the roof. Therefore your slope factor for a 6 12 pitch roof is 1 118. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

For example if you measure 4 inches the pitch of your roof is 4 12. The result is divided by 12. This table lists all of the common roof slopes expressed as rise run roof angle roof slope slope grade and walk ability. Warm roof slope factor cold roof slope factor.

Dividing 13 416 by 12 equals 1 118. This will give you the rise over run or pitch. See below after the table for directions on how to convert any roof slope from one form to another. Accurate roof calculations are achieved using this table and all you need to do is measure the roof width and length and then you are ready to do a roof pitchmeasurement.

The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages. The roof slope factor can be determined through sections 7 4 1 through 7 4 4 of asce 7 10 and can be known as. From here note down the reading of the level to the. This article series gives clear examples just about every possible way to figure out any or all roof dimensions and measurements expressing the roof area width length slope rise run and unit rise in inches per foot.

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. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter. Six squared is 36 and 12 squared is 144. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. The square root of 180 is 13 416. Place the level at the center of the top ridge. Adding 36 plus 144 equals 180.

The roof slope factor is dependent on various roof properties including temperature shape and material. Suppose you have a 6 12 pitch roof.