Roof Slope Factor Table

Therefore your slope factor for a 6 12 pitch roof is 1 118.

Roof slope factor table.

Take a ladder and reach to the top of the roof. Here are the steps to assist you so that you can do it all by yourself. This will give you the rise over run or pitch. Six squared is 36 and 12 squared is 144.

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. Suppose you have a 6 12 pitch roof. 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.

From here note down the reading of the level to the. Adding 36 plus 144 equals 180. You can tie the ladder to the gutter or the fascia board. This table lists all of the common roof slopes expressed as rise run roof angle roof slope slope grade and walk ability.

The roof slope factor is dependent on various roof properties including temperature shape and material. The square root of 180 is 13 416. Place the level at the center of the top ridge. Warm roof slope factor cold roof slope factor.

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Roof slope pitch rise run typw walkability table. For example if you measure 4 inches the pitch of your roof is 4 12. The result is divided by 12.

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. This table shows the roof pitch multiplier also called the roof pitch factor for typical roof slopes used to find the area of sloped roofs or the lengths of common rafters. 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. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

Dividing 13 416 by 12 equals 1 118. See below after the table for directions on how to convert any roof slope from one form to another.