[Tagging] "floating" or "pontoon" bridges?

[Richard Welty]

On 9/2/14 1:12 PM, Martin Koppenhoefer wrote:
>
> 2014-09-02 17:46 GMT+02:00 Clifford Snow <clifford at snowandsnow.us
> <mailto:clifford at snowandsnow.us>>:
>
>     Then again if I made a pontoon out of concrete, they'd just sink.
>
>
>
>
> While I generally agree with your agreement, this is not true, ships
> can be built out of concrete (think aircraft carriers for instance),
> and German universities even hold a regular competition who builds the
> best canoe out of (fibre)cement: http://www.betonkanu-regatta.de/
the British built two whole artificial harbors during WWII using
concrete pontoons:

http://en.wikipedia.org/wiki/Mulberry_harbour

https://www.flickr.com/photos/nfgusedautoparts/sets/72157607171004437

richard

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