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.
Truss design software can be used to simplify the calculations associated with designing roof trusses and other timber elements. Each program has its own unique features. WOODexpress automatically generates truss drawings and connections, SimpleTruss software includes many examples and shows tension and compression forces, and Frame 3D software can be used with 2D and 3D structures. Additionally, Frame 3D has Matlab and spreadsheet interfaces and the option for graphical output via Gnuplot.