See how a truss carries load. Pick a classic type (Pratt, Warren, Howe, K…) or shape your own by dragging its chords, and the forces solve live: compression blue, tension red, thickness scaling with force. Slide a point load along the deck and watch diagonals flip between tension and compression, toggle the exaggerated deflected shape, and read the reactions and the member/joint count that decides whether a truss stands at all.
Runs entirely in your browser — nothing is uploaded. Hover any member for its force, or export the geometry as OBJ for Rhino, the forces as CSV, the view as PNG.