Bridge Design






  1. Using K’nex pieces provided, build a free standing bridge which spans the 12” gap.

Ground Rules:

  1. Base must be at least 13” long
  2. The bridge cannot be wider than 3-½”
  3. The mid-span must be clear to accommodate the mounting hardware shown

The Goal is to maximize ultimate strength!


  1. Think about your design before you build.
  2. Observe your failure mode, re-design to strengthen it, then test again.
  3. Think about the orientation of your connectors … they may be the weakest link.

Some Design Ideas: