11 Sep
2001
11 Sep
'01
11:15 a.m.
I beleive that many tall buildings also have counterweights on an upper
floor that compensate for strong winds, etc. When the buildings shift
in a given direction, the counter weights are moved in the opposite
direction. I don't know if the WTC buildings had such a system.
Jeffrey H. Ingber (jhingber _at_ ix.netcom.com)
On Tue, 2001-09-11 at 18:48, Terry Collins wrote:
Chad Fernandez wrote:
What do they have water tanks on top for? Is that a standard thing with
sky scrapers? Is it for fire fighting, or is it just part of the
running water system of the buildings?
Fire fighting system in case the water main is knocked out or weak
pressure.
I would imagine that the WTC and other tall buildings would have to pump
water anyway. Mains pressure is only as high as the local water tower.
--
Terry Collins {:-)}}} Ph(02) 4627 2186 Fax(02) 4628 7861
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