Parts Of A Timber Roof Truss

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.

Parts of a timber roof truss.

Bearing structural support of trusses usually walls normally with a timber wall plate. The basic components of a roof truss. The highest point on a truss where the sloping top chords meet. Cantilever part of structural member that extends beyond its support.

One of a series of diagonal members of the truss that meet at the apex in order to support the roof deck and its loads. Structural support of trusses usually walls normally with a timber wall plate. Bottom chords bc the lowest longitudinal member of a truss. It is a waterproofing layer made of regular felt stacked above the solid.

Rafters have a tendency to flatten under gravity thrusting outwards on the walls. 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. A slight vertical cut usually less than 75mm at the. A horizontal cut to the bottom of a sloping bottom chord usually the width of the bearing i e.

A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof trusses usually occur at regular intervals linked by longitudinal timbers such as purlins the space between each truss is known as a bay. 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. Cantilever strut web that joins the bottom chord above the. The wall plate width see figure 7.

Apex highest point where the sloping top chords meet.