Parts Of A Timber Roof Truss

Horizontal beams supported by posts and used to support the mid span of rafters to cover longer spans these are used in large buildings like the traditional large old barns in the us.

Parts of a timber roof truss.

A slight vertical cut usually less than 75mm at the. Bottom chords bc the lowest longitudinal member of a truss. Bearing cut or seat cut. A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework.

It is a waterproofing layer made of regular felt stacked above the solid. The wall plate width see figure 7. Roof truss parts explained. Structural support of trusses usually walls normally with a timber wall plate.

A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Cantilever part of structural member that extends beyond its support. Bearing structural support of trusses usually walls normally with a timber wall plate. The highest point on a truss where the sloping top chords meet.

A horizontal cut to the bottom of a sloping bottom chord usually the width of the bearing i e. Cantilever strut web that joins the bottom chord above the. Rafters have a tendency to flatten under gravity thrusting outwards on the walls. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates timber framed and historic buildings may be framed with principal rafters or timber roof trusses roofs are also designated as warm or cold roof depending on how they are designed and built with regard to thermal building insulation and ventilation.

The basic components of a roof truss.