What is the strongest truss bridge design?

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  1. #bridge
  2. #weight
  3. #truss
  4. #strongest
  5. #extremely
  6. #because
  7. #effective
  8. #bridges
  9. #amount
  10. #which
  11. #least
  12. #material
  13. #experiment
  14. #pratt
  15. #ratio
  16. #strength
  17. #design
  18. #tested