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RE: Design of Glass as a Walking Surface

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How about a 4000 ft drop?
See
http://news.nationalgeographic.com/news/2005/08/0826_050826_grandcanyon.html

-----Original Message-----
From: Christopher Wright [mailto:chrisw(--nospam--at)skypoint.com]
Sent: Wednesday, September 28, 2005 10:01 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: Design of Glass as a Walking Surface



On Sep 28, 2005, at 8:32 AM, Paul Ransom wrote:

> There is a glass floor in a portion of the lower pod in the CN Tower in
> Toronto. The glass and steel are probably thicker than the concrete
> floor. To me, it looks like it would hold elephants.
>
> People won't walk on it. I suppose that it might have something to do
> with the visible 1000 ft drop.
That's an interesting reaction, but not uncommon, I bet. There's a sort 
of museum in Wisconsin called 'House on the Rock.' It really started 
out as a custom-built home for an eccentric, with access to a lot of 
money and a strange architectural taste. One section of the house is 
called 'The Infinity Room' 
<http://www.thehouseontherock.com/html/infinity.htm> which is a tapered 
space maybe 200 feet long and starting out 10 feet deep and 15 or 20 
feet wide. It's cantilevered out over a steep hillside from the main 
house and supported at maybe half span, off a natural rock spire. It's 
enclosed, but opposite walls are glass. When I saw it, the engineer in 
me said, 'Proportioned right, statically redundant, sound trusswork 
carrying shear between webs, Mc/I and all that.' But my guts were 
screaming, 'Run away! Run away!' An unprofessional reaction but very 
powerful.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)skypoint.com   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 
1864)
http://www.skypoint.com/~chrisw/


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