Girder Roof Truss Design

They have a top chord and a bottom chord separated by diagonal webs and vertical webs.

Girder roof truss design.

The truss plate manufacturer s engineer usually reviews and seals the individual truss designs on behalf of the truss fabricator. The top chord is always in compression and the bottom chord is always in tension. A girder truss is designed to support other secondary roof supports. Girders may also be designed to accommodate special applications or designs.

Buildings constructed in l or t shapes use girder truss systems where the roof changes direction. Typically the building designer or builder will contract with the truss fabricator who will supply a truss layout and a structural design of each significant element of the roof system. An advantage of the truss design for roofs is that ducts and pipes that are required for operation of the buildings services can be installed through the truss web i e. The roofing system for such buildings is truss with roof covering material.

Using these structures in roof design eliminates the need for a load bearing wall below resulting in open floor plans. Girder trusses have a long straight design. Girder trusses are designed to carry additional loads other than standard roof loads. Trusses are triangular formations of steel sections in which the members are subjected to essentially axial forces due to externally applied load.