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Compression Ring Design

Compression Ring Design

Compression Ring Design

(OP)
I have a roof structure shaped like an octoganol pyramid (8 sides coming to a single point in the center).  Total clear span is to be about 200'.  I am thinking of using steel joists/trusses come to the center, and sit on a compression ring.  

Anyone got any tips on the design/analysis or know of any good references to look at?

RE: Compression Ring Design

     "Colorado Dome" by Richard Weingardt, Civil Engineering-ASCE, Vol 63, No. 6, June 1993 pp 60-62.
     "Design and Construction of the Tension Braced Dome Roof Marine Midland Arena- Buffalo, New York."

RE: Compression Ring Design

Does not the presence of a "compression ring" in the center of the roof necessitate the presence of a "tension ring" at the outside - as with the now defunct Kingdome in Seattle?  This was a concrete ribbed roof.  I still have a portion (18" length) of one of the ribs #14 bars in my office.  A lot heavier than a paperweight.

Mike McCann
McCann Engineering

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