Girder Roof Structure

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.

Girder roof structure.

A girder is commonly used to build bridges. A girder truss is designed to support other secondary roof supports. Beams are the choice of structural member because of their incredible load bearing capacity against all conditions. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

The tables below give maximum spans for rafters and beams. Beams support the structural integrity of buildings mostly residential structures and can be found in floors walls ceilings roofs and decks. These are often pre fabricated and sent to a construction site. A truss is a roof or floor support structure built from a connected series of box or triangle shaped elements to distribute load to a building s walls or foundation.

Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs. A girder ˈ ɡ ɜːr d ər is a support beam used in construction. The figures are based on quality materials. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.