Don White wrote:
tak wrote:
" JimH" jimh_osudad@yahooDOT comREMOVETHIS wrote in message
...

A water bridge for boats built over a river. Pretty amazing!

http://www.funonthenet.in/content/view/223/31/

http://www.dw-world.de/dw/article/0,,990878,00.html
Google NYS Erie Canal (1 version) for examples nearer to home.




Can you imagine the weight of bridge structure, water & boats.
I wouldn't want to spend too much time under it.

Nah, I'd stay under it all day. It's not really that bad. For one
thing, the water (the heaviest element) is a totally uniform load,
meaning it's spread out over the entire surface, not a point load,
plus, it's static not dynamic. Now, there is some tremendous loading
going on, but it's all very easily accounted for, nothing abnormal
going on.