Timber Frame Roof Structure

There is a hierarchy of timber framing at work here with trusses supporting the ridge and purlin beams.

Timber frame roof structure.

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. The roof framing is the structure that supports your roof. Collar ties rafter ties tension beams structural ridge beams. Above these components is a rack of common rafters.

Our flex design process makes it easy for you to make structural adjustments including adding additional trusses changing the width and height or modifying the roof pitch. Timber framing in america is an art of craftsmanship brought by the settlers in the 1500 s. The main decision that needs to be made with erecting a roof is which material to use for its construction. A timber frame truss roof with ridge beam purlins and common rafters is a stunning combination that creates visual interest and structural complexity.

Timber vs metal frames. There is an innate and natural affection for curves and arches in architecture. Timber framed and historic buildings may be framed with principal rafters or timber roof trusses. 3 06 timber frame timber flat roof 3 07 timber frame timber flat roof with parapet 3 08 timber frame lintel at window head 3 09 timber frame windows and doors jambs and cills specification within an example should 3 10 timber frame ground bearing floor insulation above slab 3 11 timber frame ground bearing floor.

The space between each truss is known as a bay. Some of these can support the roof and prevent ridge sagging and wall spreading. 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. Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates.

For arbors gazebos pavilions pergolas and trellises a continuous curved arch that forms a timber frame roof for a pergola adds interest as well as drawing the eye upwards giving the perception of a grandeur scaled structure. For efficiency in both construction effort and material use timber frame structures are typically erected in boxlike sections called bays consisting of two bents one on each end along with additional frame members that connect the bents and form the structure. Many people still think that the roof structures of timber framed buildings look like the upside down hulls of boats. Trusses usually occur at regular intervals linked by longitudinal timbers such as purlins.