![]() In earlier time houses were made of timber and the roofs were pitched roofs. The design of pitch of roof plays a very important role for the right construction of a house. Here span is a horizontal distance between the outside of one wall top plate to another. ![]() Pitch is an inclination of the roof, and it is defined as the fraction obtained by dividing the total rise of roof from horizontal plane by the span of a building. Procedure for calculating the angle of roof.Some common roof pitches are 4 in 12, 6 in 12, 8 in 12, and 10 in 12. That means to express as “X in Y” the Y will always be 12 or 1 feet while X can vary from 1 to 12 (1 being lowest while 12 being highest).ġ2:12 roof pitch will make 45 degrees and that is too steep for a roof. Pitch is always expressed as inches per feet. ![]() That means such a roof has a slope of 4:12 and it translates to degrees as about 18.4 degrees.Īny roof with pitch is not too steep you might be able to walk on such a roof.Ĥ:12 roof pitch (18.43 degrees) is less steep than 6:12 roof pitch (26.57 degrees). A roof having 4 inches of rise for every 12 inches of run has 4 in 12 roof pitch. ![]()
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