Engineers: Best Bridge Structural Efficiency?

Joshy asked:
Hey guys,
I am creating a bridge out of 3/32″ Balsa Wood, and need to give it the best structural efficiency.
I have asked this question before, but got minimal replies.
Which type of bridge has more potential for great Structural Efficiency, meaning, what design can I use that will be very light, and carry the biggest [...]

Question to engineers about that bridge collapse?

vcxzzxcvvcxzzxcv asked: Am I the only person that finds it odd that someone would make an ARCH bridge where the arch is made out of steel?
The arch in an arch bridge is always under compression, and steel is not that great under compression. I think a small layer of steel reinforced concrete under the steel [...]

What are the new biggest engineering projects in the last 10 years?

Gabrio asked: Buildings, bridges,dams, tunnels, ships:Eurotunnel, 3rivers dam in China…
and where are they?

The recent bridge collapsed in America, killing and wounding some is worrisome, what is the cause?

oscar boom asked: American government spend millions of dollars in Iraq in a day one wonders why they did not heed ealier warning by engineers concerning the bridge, why fight terrorism outside and neglect your own citizens, I think now is the time for America to do a rethink concerning its policies, they have an [...]