What is the strongest yet most economical (as in cheapest) way to build a truss bridge?? I am talking about the design of the bridge itself as in do the diagonals all face the same way or vary... I have no idea.
We are building our bridge out of KNEX and it must stand 30 newton which is just over 3 kg or 6.6 pounds.
HELP!
Answer:
my guess (although may be incorrect) is to build it with your diagonals going the same direction on one half and the opposite direction on the other, changing direction at the center. How is your bridge going to be supported?
try to put some kind of arch in at the bottom.
something like this
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