Trusses are statically determinate structures solely consisting of two-force members, so basically assemblies of pinned beams. Trusses are most commonly seen in bridges, where the top beams "top chords" are typically under compression and the bottom chords are under tension.
|Warren truss bridge|
In my case, a desktop with a truss frame would experience tension on top and compression on the bottom. This design problem is similar to overhead cantilever road signs seen on the highway! Therefore, my desktop design can draw from a wealth of experience and calculations.
|Highway signs also have to deal with significantly higher lateral loads than my desk does|
|Highway signs typically use a Pratt truss geometry to minimize sensitivity to buckling|
|Drawings and calculations for a highway overhead sign in I-85 Atlanta, GA|