Shed Roof Framing

A roof frame is an important structure not only because it supports the roofing and

helps keep the building dry,but because its style and shape have a great impact on the character of the building,the feel of the interior space,and the amount of storage space available.

There are four common roof types.A gable roofis the classic,triangular design,with two sloped sides meeting at the peak,and flat ends(called gable ends).Gambrel roofs are likegable roofs with an extra joint on each side,resulting in twodifferent slopes.A hip roof is structurally similar to a gable,but hasno gable ends.Shed roofs are the simplest style,with only onesloped plane.They can be built with frames or,for small structures,a sheet of plywood.

All of these roof styles have a designated slope,which is the degreeof angle of each side.The slope is expressed in a ratio that states the number of inches of vertical rise per 12" of horizontal run.For example,a roof that rises 6" for every 12" of run is said to have aslope of 6-in-12.Roof slope is indicated in plan drawings by a triangular symbol known as the roof-slope indicator.You'll use theroof slope to lay out rafters and fascia.

In standard roof framing,rafters are the principal structuralmembers,rising from the walls to theridge board(or hub,ingazebos)at the peak of the roof.Rafters in outbuildings typicallyare made from 24s or 26s,are spaced 16"or 24"on center,and are installed perpendicular to the length of the building.Tokeep the roof planes from spreading apart,rafter ties,or collar ties,are nailed between opposing rafters to form a structural triangle.With shed-style roofs,the rafters span from wall-to-wall and noridge board or ties are needed.

The key to successful roof sheathing framing is making accuratecuts on the rafters.Take your time to cut the first two rafters,making any necessary adjustments,then use one as a pattern formarking the rest.

As an alternative to rafter framing,you can take your plans to atruss manufacturer and have custom trusses built for your project.However,this will cost you more and probably will limit your storage space:the internal supports in truss frames leave little room for storage.

Shed Roof Framing

By: woodchuck

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