Video: Building Big-Bridges

• Part 1-Arches
• Part2: Cast Iron
• Part3: Suspension Bridges
• Part 4: Brooklyn Bridge
• Part 5: Golden Gate

Demos During Video:

• Cantilever-students sit on extended beam
• Twisted (wire) rope- Roebling- students twist paper into fibers, then combine into cables- enables equal stress on all fibers
• Caisson Demo-plastic cup in water
• Harmonic Vibration-plucked string

Building Big Website Activities-

• Build-A-Bridge:
  • Survey the Sites
  • Types of Bridges
  • Build-A- Bridge
• forces lab

Video excerpts:

Roman Arches

Train Truss Animation

Firth of Forth Cantilever Bridge

How Cantilever Bridges Work

Clifton Gorge Suspension Bridge

Brooklyn Bridge