🌉 Span Master

Engineer a bridge that survives a loaded truck. Every beam is simulated as a real pin‑jointed truss: forces flow through the joints, long compression members buckle, and anything stressed beyond its limit snaps.

• Drag between grid points to place wood (cheap, weak), steel (strong, expensive) or road (the deck the truck drives on).
• Triangles are rigid, rectangles collapse. Brace your deck from below or above.
• Press Test to release the truck. Blue members are in compression, red in tension.
• Stay under budget — finish cheaper to earn up to three stars.