The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle the rise or height of the roof at its peak is the altitude of the triangle the run or half the building span is the base of the triangle and the line length measurement from the roof peak to the building wall is the hypotenuse. Roof framing depends on the type of roof you want to build there are several roof types the gable roof hip roof gambrel roof flat roof shed roof mansard roof and many more custom roof types. Truss framed roofs are built from triangular shaped pre made truss units gable and hip roofs may be built primarily of trusses other roof shapes particularly those with dormers or on houses with cathedral ceilings attic rooms or attic storage areas are stick built. Chapter 2 roof framing in this chapter we will introduce you to the fundamentals of roof design and construction but before discussing roof framing we will first review. Framing a roof is the last step in framing new construction while most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below
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