Gable Roof Truss Detail

The bracing shown in this detail is for the vertical studs only.

Gable roof truss detail. Figure 7b shows a continuously reinforced cut masonry rake beam along the top of the gable end wall. Structural gable truss standard gable truss an adequate diaphragm or other method of bracing must be present to provide full lateral support of the bottom chord to resist all out of plane loads. Building a gabled roof requires basic carpentry tools and skills but as long as you make precise cuts and measurements you ll be able to make a roof for any simple structure. Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length.

A gable truss isn t structural and needs a continuous bearing support underneath such as a beam or wall. A ladder type overhang detail also can be used with the concrete rake beam where the beam is constructed to the same height as the trusses similar to that shown for the cut masonry rake beam in figure 7b. Horizontal brace see section a a mitek usa inc page 2 of 2. Gable end details for closed eaves.

If a truss roof is used with this method the gable truss is manufactured 3 shorter than the others. The cleanest look for a gable end with a closed eave is to angle the soffit therefore eliminating the need to resolve the eave at the gable end. When a roof is framed with prefabricated wood roof trusses the gable endwall is typically framed with an endwall panel supplied by the truss manufacturer that is commonly and incorrectly referred to as a gable endwall truss. A gable truss sits on the end wall of a structure and has vertical studs every 2 feet or 16 inches.

This condition is prohibited by some building codes because adequate bracing of this condition is difficult and sometimes impossible. Then the barge or fly rafter is attached to the end of the cantilevered outlooker. Then a 2 4 outlooker is placed over the dropped gable and butted into the side of the adjacent full height truss. The gable roof is one of the most popular roof designs due to its attractive symmetrical shape efficiency at shedding water and option for attic space.

Gable trusses are more expensive than common structural trusses because more lumber is required. This configuration gives the look of an open eave but it has the same benefits ease of maintenance and energy performance as a closed eave. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors.