Timber Roof Structure Detail

Timber framed and historic buildings may be framed with principal rafters or timber roof trusses.

Timber roof structure detail.

Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. When constructing a pitched rooftop with timber this can be an incredibly labor intensive build. Covers pitched roof detail. As each truss is designed to form part of the complete roof structure they should never be cut modified or their use changed i e.

Raised tie truss 3 3 3. Detail description 3 00 timber frame isometric cut away view 3 01 timber frame pitched roof. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. The most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to.

Gable a gable roof has a ridge at the center and slopes in two directions. Timber pitched rooftop construction details focus on the timber construction that is commonly used in most roofing constructions. Bracing diagonal and longitudinal 3 4 1. Covers pitched roof materials basic pitched roof designs cold and warm pitched roofs and pitched roof construction.

Each modern roof truss is designed and made for a particular position in the roof structure and is made up of butt jointed timber lengths typically nailed together using plate fastenings no type of timber joint being used. The construction of the flat roof is similar to that of the timber upper floor. Load bearing or primary structure usually constructed in timber in a residential construction. Internal wall to internal wall junctions 3.

Ventilated batten void warm roof eaves. Historically truss timbers have been bolted together or mortise and tenoned and then pegged. Timber boarding on timber frame 1 9. It s considered heavy timber when.

The minimum sizes are 6 x 8 for a column supporting a roof 8 x 8 for a column supporting a floor 6 x 10 for a floor beam 8 x 8 for a roof truss member 4 x 6 for a roof beam 3 1 finish floor decking 2 roof decking according to the building code. Part 2 pitched roof construction. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. A roof being framed in the united states circa 1955.

It is the form most commonly used by. Replacing a slate roof covering by a. Tank stand and walkway 3 3. Ventilated roofspace eaves 3 02 timber frame pitched roof.

Timber is a heavy material that adds strength to your roof but comes at quite the cost. Part 3 pitched roof detail. Ventilated rafter void gable 3 04 timber frame pitched roof. The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging.

An example of each is shown in figure 2 1. Render on timber frame 2.