Vaulted Gable Roof Framing

This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.

Vaulted gable roof framing.

Some of these can support the roof and prevent ridge sagging and wall spreading. Each truss is composed of two opposing rafters and a ceiling joist. Much depends on the structure size and the desired attic loft or headroom. 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.

In conventional gable roof framing the slope of the roof is formed by rafters that run diagonally downward from the peak of the roof to the tops of the exterior walls of the building. To avoid these problems in a structure with a cathedral ceiling it helps to understand how a typical roof frame works. A flat bottom chord gable end frame used with adjacent trusses that have sloped bottom chords see figure b3 42b creates a hinge in the wall gable interface that is below the bottom chord plane diaphragm. Scissor trusses flat bottomed gable ends 10 14 2019 page 50 of the bcsi b3 states the following.

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 plain flat ceiling gable is actually a procession of light trusses usually spaced 16 in. An engineer must determine rafter size placement and pitch based on span and. Contributing editor scott mcbride replies.

Collar ties rafter ties tension beams structural ridge beams. For example in texas where stick framing is common there are entire crews specializing only in framing roofs. Stick framing a roof with rafters is the old fashioned and still most common method of obtaining a vaulted ceiling. Builders sometimes also prefer this construction method when they want to provide a large attic space or high vaulted ceilings often called cathedral ceilings.