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A few popular truss design software programs available online for free include WOODexpress, SimpleTruss and Frame 3D. Free truss design tools are available online and as downloadable programs for offline use.


To build trusses, determine the pitch, or the slope, of the roof, and use a rafter square to measure the angles needed to construct the trusses with the correct slope. Make the mitered cut on each rafter, and secure them to the ceiling joist.


Design a basic wood truss to suit the purpose it is being built for, basing the dimensions of the truss on the measurements for the entire building. A well-designed wood truss can serve as a sturdy roof for a garden shed or as the roof of a small building.


Websites with designs for building roof trusses include WoodWorkersWorkshop.com and IAState.edu. Wood Workers Workshop also offers designs for a truss dining table, shelves, a clear-span barn, rafters and split-ring trusses. The site also has plans for tables, folding d...


Roofing trusses are prefabricated triangular pieces of wood used to support a roof. Due to their construction, trusses are very strong and inexpensive.


To design a basic wood roof truss, place a joist member at the bottom. Two raft members attach to the joist member and meet in the middle in order to create a triangle. Depending on preference and functionality, either the raft or the joist should overlap each other to ...


A truss consists of a set of members that act in compression or tension as a unit, and truss bridges stay up because of the forces that pull outward on the ends of the tension member, forming a triangular structure that keeps the bridge in place. A triangle is the ideal...