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ASCE 7, Wind Loads on Outside Piping
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 Subject: ASCE 7, Wind Loads on Outside Piping
 From: "Jay Zadeh" <phpkzadeh(nospamat)att.net>
 Date: Fri, 7 Feb 2003 06:32:45 0800
Colleagues;
I have never used this spec. and have a few stpuid questions as
follows;
A. section 6.4.2 requires to calculate appropriate pressure or force
coefficients per provisions of 6.7.
B. Section 6.7 says look at Figs 63 thru 68 for pressure coefficients
& table 64 thru 68 for force coefficients (include gust
factor).
Questions 1. For outside piping should we use both pressure
& force coefficients? If yes, then the pressure coefficients are not defined
in Fig. 63 thru 68 for outside "non structure" piping. My guess is that
we should only use the force coef. per table 67. Which leads me to
believe that we only need to calculate the forece on the system per
expressions given in table 61.
2. Table 61 if the fundamental frequency of
the system is <1 Hz, then to calculate force on a pipiing system we also need
to calculate Gf (the gust factor) by rational analysis. What they mean by
rational analysis? How is that done?
Thanks in advance,
Jay Zadeh

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