Stick Frame Roof Bracing
The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.
Stick frame roof bracing. There are two common ways of framing the roof of a house. A standard triangular roof known as a gable roof is framed using rafters which are diagonal members that support the roofing materials. The run or half the building span is the base of the triangle. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.
Framing a shed roof is similar to framing a wall. A stick framed roof is made up of individual rafters and that are connected to a top beam. And the line length measurement from the roof peak to the building wall is the hypotenuse. Floor beam span tables of residential structural design we will now look at roof rafter and beam design.
Continuing on from part 3. Here we have a wood framed gable roof. The rise or height of the roof at its peak is the altitude of the triangle. Also an engineered truss roof frame does not ordinarilly have a ridge.
Stick framing can also produce. The beam or the ridge is the central part of the structure as all the framing must be connected to it. For stick framed roofs that have horizontal joists rafters rest on the exterior wall plates and slope upward to meet at a center ridge board to form a gable roof. Then dimensional lumber called rafters are cut to fit one piece at a time and shoved up to a framer on the roof that s balancing on scaffolding who installs the rafters.
Stick to the basics of simplified design and use dimensions that don t generate waste. The fascia board is the bottom plate and the ridge board the top plate. How to frame a gable roof without ceiling joists. This is on a conventional stick frame non truss structure as engineered roof trusses do not require collar ties from a framing material as they are tied together with metal plates gussets.
It starts with setting ridge and valley beams above the house walls. Keep it simple and remember. Stick frame roof bracing applied to rafters above collar ties msquared48 structural 7 apr 18 16 49 if the collar tie is placed high in the rafters i cannot see any advantage putting more reinforcing above the tie to help the rafters. While truss roofs are the most popular construction style today by some estimates truss roofs outnumber stick frame roofs two to one there are regions of the country where builders still prefer stick frame roofing.
Additional boards are placed horizontally on the frames to create a complete cover for the structure. Stick framing is building the roof on the construction site one piece or board at a time.