Standard A Frame Roof Pitch

The roof pitch is described by the vertical rise divided by horizontal span.

Standard a frame roof pitch.

A frame roof is the sharpest gable style roof resembling the shape of the letter a. This is the slope of geometry stairways and other construction disciplines or the trigonometric arctangent function of its decimal. Making decision about roof pitch. Roof pitch is a measurement of a roof s slope expressed as a ratio.

This part is well known as slope in geometry tangent function or stair construction in trigonometry. The british standard for tilling and slating provides specific guidance about double lapped slating where calculations and recommendations for pitch and lap of slate are based on. It is a traditional roof shape employed everywhere from tropical huts to nordic ski chalets. A gable roof is a traditional triangle shaped roof that can range from a medium pitch to sharp angled roofs.

A frame houses are perhaps one of the oldest house designs in the history of civilization their low sloping roofs being easily constructed from thatching and skins in america the modern a frame house was developed in the 1950s by new york architect andrew geller. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. Although there is no single standard roof pitch used on all sloped roofs factors such as roofing materials and local climate help to determine the appropriate range of pitches for a given building.