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10-10-2003, 02:12 PM

On 10 Oct 2003 10:41:54 GMT, (Nick Maclaren) wrote:

In article ,
martin writes:
|
| In the booklet "The Design of Free-standing Walls", there is a map
| showing the speeds that are used for building design in the UK. I
| am not going to summarise it (as it is very complex), but here are
| a few examples:
|
| London 37
|
| that may not look much, but it is in fact Force 12 75 MPH
|
| It doesn't give much reserve for really big storms.
|
| It's not surprising that roofs get blown off.

I don't think that London has had more than a force 10 in several
decades, though I could be wrong. It is the most sheltered part
of the UK.

The wind downwind of Canary Wharf is much greater than the nominal
wind. I was in a plane that almost came to grief taking off from City
Airport.

The figure for Lewis is somewhat impressive - much higher than
hurricane Isobel - in fact, Lewis gets winds higher than that
rather anaemic hurricane every year :-)

usually from the remains of a hurricane.

I remember in the nineteen sixties, that around there an anemometer
measured 140mph before it was blown away.
--
Martin