Roof Slope Factor Table

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.

Roof slope factor table. From here note down the reading of the level to the. Dividing 13 416 by 12 equals 1 118. Adding 36 plus 144 equals 180. Warm roof slope factor cold roof slope factor.

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. You can tie the ladder to the gutter or the fascia board. The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages. This will give you the rise over run or pitch.

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. This table lists all of the common roof slopes expressed as rise run roof angle roof slope slope grade and walk ability. Here are the steps to assist you so that you can do it all by yourself. Therefore your slope factor for a 6 12 pitch roof is 1 118.

Roof slope pitch rise run typw walkability table. 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. Place the level at the center of the top ridge. The result is divided by 12.

The square root of 180 is 13 416. 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. Take a ladder and reach to the top of the roof. Suppose you have a 6 12 pitch roof.

The roof slope factor is dependent on various roof properties including temperature shape and material. 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. See below after the table for directions on how to convert any roof slope from one form to another.

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Six squared is 36 and 12 squared is 144.