Girder Roof Truss Design

Girders may also be designed to accommodate special applications or designs.

Girder roof truss design.

These loads can be other trusses that attach by sitting on top of the girder or they may attach to the side of the girder using truss hangers. The truss plate manufacturer s engineer usually reviews and seals the individual truss designs on behalf of the truss fabricator. Trusses are triangular formations of steel sections in which the members are subjected to essentially axial forces due to externally applied load. Buildings constructed in l or t shapes use girder truss systems where the roof changes direction.

Girder trusses have a long straight design. Using these structures in roof design eliminates the need for a load bearing wall below resulting in open floor plans. Figure 6 1plane truss trusses are frequently used to span long lengths in the place of solid web girders. A girder truss is designed to support other secondary roof supports.

They have a top chord and a bottom chord separated by diagonal webs and vertical webs. 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 top chord is always in compression and the bottom chord is always in tension. The roofing system for such buildings is truss with roof covering material.