Standard A Frame Roof Pitch

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.

Standard a frame roof pitch.

The pitch of a roof is its vertical rise over its horizontal span. 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. 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 part is well known as slope in geometry tangent function or stair construction in trigonometry.

His house was notable for the distinctive slope of its roof which allowed snow to tumble to the ground rather than remaining on. The roof pitch is described by the vertical rise divided by horizontal span. Roof pitch is a measurement of a roof s slope expressed 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.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Making decision about roof pitch. It is a traditional roof shape employed everywhere from tropical huts to nordic ski chalets. A frame roof is the sharpest gable style roof resembling the shape of the letter a.