Roof To Wall Framing Detail

Rafters act more like the top chord of a roof truss than as a roof joist.

Roof to wall framing detail.

A literature review was conducted and supplemented with new research on the performance of conventional roof systems and components including ceiling joist to rafter connections and roof framing to wall connections. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Because most roof flashing is required to extend up the wall a minimum of 4 and some a minimum of 5. The focus of this project was on connections used with conventional light frame wood roof construction.

The rafters carry the applied loads to the exterior walls. In buildings including residential structures framing systems typically consist of the roof structure that supports the roof. To wall sloped roof no overhang ledger support. This will keep weather out prevent lifting in high winds and provide a neat fin ished appearance.

Addition to floor and roof framing details this guide includes recommendations for cantilevers and placement of web holes. Joist attachment per detail 1b load bearing wall above shall align vertically with the wall below. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. In a rafter roof all of these components are required to provide a stable roof.

At roof to wall intersections see figure 1. The run or half the building span is the base of the triangle. Other firestopping requires 2 inch lumber or two thicknesses of 1 inch lumber with staggered joints or one thickness of inch plywood with joints backed by 1 inch lumber or inch plywood. To provide a drip edge allow an overhang of 1 to 2 inches at the eave.

Sills and plates normally provide adequate firestopping in walls and partitions. And the line length measurement from the roof peak to the building wall is the hypotenuse. Cont 2x2 soffit framing jiit li wallsheathing fascia vented soffit system 1. The function of each component is.

Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Framing must transfer all gravity uplift and lateral loads to the foundation. Exterior wall parapet rafters prep. Needed to tie the roof together where the rafters are framed at an angle to each other.

Other conditions such as offset walls are not covered by this detail. The roof flashing is then placed up behind this through the wall z bar flashing on the outside of the vertical blocking backing material. Do not seal housewrap or building paper to step flashing. The trim and roofing sheet should be fastened every 12 to 24 inches along the gable edge.

Deck exterior and interior load bearing walls beams girders posts and floor framing.