BRIDGE BEAMS- use them to build almost anything

A luffing jib tower crane lifting a through truss. All built with 1/4″ plywood “bridge beams”
Through arch bridge with a suspended deck
Small crane model with boom set a 30-45-or 60 degrees.
Hammerhead crane with a 3 brick counter weight
Through truss with plexi-glass gusset plates.
Deck truss
Here’s a “taller” deck truss