So pitch of roof is equal to = rise/run = 6/12. for example a roof that Rises 6 inches vertically for every 12 inches of horizontal run. Which of roof is calculated by number of inches it Rises vertically for every 12 inches in extend horizontally. 5) pitch of roof :- it is the inclined angle formed between Rafters of roof and run of roof.It is used over brick external wall, wall plate, over two support and over top of beam.
Length of roof rafters depending on climatic condition, style, slope and type of structure. Rafters are generally provide in series, side by side, providing a plateform to support roof decks and roof coverings.
Rafter runs from the ridge or hip of the roof to the wall plate of the external wall. Pitched roof is type of roof comprising sloping surface or surface with an angle of usually over 20°, generally it slopes downward in one two or more parts depending on design and construction.Ī rafter is a structural component build of wood or steel that is used as part of a roof construction. These are two types of roof structure based on slop.įlat roof is type of roof in which slope is generally less than 10°, which only enable to ensure adequate drainage of rainwater in low to moderate rainfall regions.
The area which has heavy rainfall and snowfall require good drainage for roof, roof drainage depending on slope of the roof provided, based on slope of roof it is categorised into two types flat roof and pitched roof or sloping roof. Design and construction of roof is depending on many factors but one of the most common important factor is climatic and weather condition of your surrounding areas, in your cities and countries.