On Tue, 22 Mar 2005 17:11:04 GMT, the inscrutable "Don"
spake:

Well, "while continuously receding from or approaching it" describes a
cone perfectly, Don.

Is a coil spring, like the ones in the suspension of a car, a spiral?

No, it's a coil, a helix.


CW is right. Couldn't they more correctly be
called "helical stairways"?

Take a look at this, they illustrate the diff between spiral and helix
stairs.
Spiral stairs have a center structural member that supports one side of the
treads.
Helix stairs have no center support and rely on the structural integrity of
double stringers on either ends of the tread. Notice that the helix stair
will have 2 diameters, one to inside stringer the 2nd to the outside
stringer. Spiral stairs have only 1 diameter.
http://www.spiralstairsofamerica.com/gallery.html

That's marketing terminology for you.


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Was that an African + http://www.diversify.com
or European Swallow? + Gourmet Web Applications
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