Some free online programs for truss design and calculation are Medeek Truss Designer, Global Truss Tool 3D, SkyCiv Engineering Free Online Truss Calculator, and Bridge Design. In addition to these, there are many other tools available online as well as free, downloadable truss design software for offline use.
Some online truss design tools require website sign-up, and some have additional functionality added for a fee. Each program contains slightly different features depending on the particular truss design project and the desired output from the program. Trusses can be designed in either two or three dimensions and both static and dynamic structural analysis can be performed.