The arch bridge
Inventors (Intermediate), mission I6 Bridges & Structures, lesson 2 of 6.
Hook
The Romans built arches that still stand after 2,000 years. What is the secret?
Fair test
Same 30 cm span, same coin test. Compare with the truss bridge in a table.
Bonus challenge
Press down on the arch. Where do the feet push? Put your hands there to feel it.
The build
Arch Bridge: The same span as the truss bridge but carried by a curved arch of bent beams. Which one holds more coins?