Pitch Roof Ratios

Roof pitch refers to the slope which the rafter creates.

Pitch roof ratios.

Often you express roof pitch as the ratio between the rise and the run in the form of x 12. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope. Roof pitch is used to describe the slope or angle of the roof. Sometimes pitch is also expressed in fraction form using a fraction.

If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio. However most often a ratio of pitch also fraction is slang used for the more useful slope of rise over run of just one side half the span of a dual pitched roof. It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof. Roof pitch is often expressed as a ratio between rise and run in the form of x 12.

You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. Roof pitch is simply the slope created by the rafter. This is the slope of geometry stairways and other construction disciplines or the trigonometric arctangent function of its decimal. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run.

Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. The pitch of a roof is its vertical rise over its horizontal span.