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Re: Cq for antennas

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I wouldn't use a building code to design an antenna supporting tower.

There is an ANSI National Standard for Steel Antenna Towers, produced by
the Telecommunications Industry Association (TIA).  The latest version of
the document that I have is TIA/EIA -222-F-1996.  (A later copy is probably
available.)  This document addresses wind loads on the towers as a whole,
the individual structural members, and appurtenances hanging off the tower.

In answer to your question, the external pressure coefficients prescribed
in TIA/EIA-222-F for appurtenances such as flat antennas range from 1.4 to
2.0, depending on the aspect ratio.

Rick Drake, SE
Fluor Daniel, Aliso Viejo, CA

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                    "arman s rivera"                                                                                
                    <asrivera@edsama      To:     seaint(--nospam--at)seaint.org                                                 
                    il.com.ph>                                                                                      
                    10/10/01 08:11        cc:                                                                       
                    AM                                                                                              
                    Please respond        Subject:     Cq for antennas.                                             
                    to seaint                                                                                       
                                                                                                                  . 
                                                                                                                    




in computing for the wind load of microwave antennas (let's assume the
antennas are flat), what is the proper Cq value to be used?  (as per the
UBC table)

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