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RE: Helical Steel Stairs Question

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See the Seaint archives dated May 2000. On May 26 there was some discussion. I say that to say that you may need to search the June 2000 archives if it is not included in the May archive.
-----Original Message-----
From: William Grizzell, P.E. [mailto:wtgrizzell(--nospam--at)]
Sent: Wednesday, October 02, 2002 2:08 PM
To: seaintpost
Subject: Helical Steel Stairs Question

I've been asked to provide a design for a residential steel stair that has a double helix twisted shape, approx. 10 ft. high and has a 180 degree radius.  I plan on using cold rolled 12" channel for the stringers with welded z-shaped plates for steps.  The stairs will be wrapped in wood.  Any suggestions on how to calculate this or other recommendations are much appreciated.

William Grizzell, P.E.
Consulting Engineer - Structural
2278 Camino Ramon, Suite 12
San Ramon, CA
Phone: 925-866-1171
Fax: 925-866-1121

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