Timber Roof Structure Detail

A roof being framed in the united states circa 1955.

Timber roof structure detail. Historically truss timbers have been bolted together or mortise and tenoned and then pegged. Below is a sketch of the original roof wall structural details for this building. When constructing a pitched rooftop with timber this can be an incredibly labor intensive build. Ventilated roofspace gable 3 03 timber frame pitched roof.

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. Timber pitched rooftop construction details focus on the timber construction that is commonly used in most roofing constructions. Timber is a heavy material that adds strength to your roof but comes at quite the cost.

Replacing a slate roof covering by a. The most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. Part 3 pitched roof detail. Covers pitched roof materials basic pitched roof designs cold and warm pitched roofs and pitched roof construction.

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. 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. Gable a gable roof has a ridge at the center and slopes in two directions. Raised tie truss 3 3 3.

The original roof was built using purlins beams extending between gable ends. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates. Detail description 3 00 timber frame isometric cut away view 3 01 timber frame pitched roof. Tank stand and walkway 3 3.

The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging. 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. Bracing diagonal and longitudinal 3 4 1. 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. An example of each is shown in figure 2 1. Ventilated rafter void gable 3 04 timber frame pitched roof. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings.

Render on timber frame 2. Part 2 pitched roof construction. Ventilated roofspace eaves 3 02 timber frame pitched roof. Internal wall to internal wall junctions 3.

Ventilated batten void warm roof eaves. Covers pitched roof detail.