Roof Run Definition

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.

Roof run definition.

This table lists all of the common roof slopes expressed as rise run roof angle roof slope slope grade and walk ability. Runoff definition something that drains or flows off as rain that flows off from the land in streams. The angle a roof surface makes with the horizontal expressed as a ratio of the units of vertical rise to the units of horizontal length sometimes referred to as run. To see how pitch impacts the look of a garage and changes cost click the design center button on our pole barn kits page.

Slope a roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run. The pitch of a roof is its vertical rise over its horizontal span. Roof run the horizontal distance from the outside of a bearing wall plate to the center of the ridge rafter. 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.

Definition of roof slope. The same roof has a 4 12 or 1 3 pitch. Originating in gothic architecture this is a water spout for roof run off. Roof span equal to twice the roof run or the horizontal distance between the outside faces of bearing wall plates.

A roof is part of the building envelope. For english units of measurement when dimensions are given in inches slope may be expressed as a ratio of rise to run such as 4 12 or as a percent. Roof slope can also be described as the angle of change in elevation expressed in one of several forms. The characteristics of a roof are dependent upon the purpose of the building that it covers the available roofing.

Roof slope is the amount of vertical change in height as a ratio of horizontal distance traveled also expressed as inches of rise per foot of horizontal run or cm of rise per m of horizontal run. This is the slope of geometry stairways and other construction disciplines or the trigonometric arctangent function of its decimal. Roof pitch is simply the slope created by the rafter. A measurement of roof area that equals 100 square feet an area 10 feet by 10 feet.

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. 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.