Run Of Roof Definition

The characteristics of a roof are dependent upon the purpose of the building that it covers the available roofing.

Run of roof definition. The horizontal change in distance or the horizontal distance covered by an un supported rafter or truss. 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. That s the same as a 14 degree slope or a 25 slope. This is the slope of geometry stairways and other construction disciplines or the trigonometric arctangent function of its decimal.

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. A 3 in 12 roof rises 3 for every 12 of run. 3 of rise per 12 of run is the same as 1 of rise per 4 of run or 1 4 25. A roof is the top covering of a building including all materials and constructions necessary to support it on the walls of the building or on uprights providing protection against rain snow sunlight extremes of temperature and wind.

All content on this website including dictionary thesaurus literature geography and other reference data is for informational purposes only. The pitch of a roof is its vertical rise over its horizontal span. Roof pitch is simply the slope created by the rafter. 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.

Roof pitch is often expressed as a ratio between rise and run in the form of x 12.