On Thu, 06 Aug 2009 09:04:36 +0000, Huge wrote:
Just out of interest, why are flour mills so strongly constructed?
Presumably all that strength costs money and isn't done without good reason.

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

Yes, I know someone with a grain store out here in the US - the
construction's interesting; very strong frame and walls, but the roof is
obviously designed as a weak point so that any explosion will be diverted
upwards. (I've seen similar intentional weak points inside places that
handle explosives - but I suspect a lot of folk don't realise that grain
dust in a confined space can be quite potent)