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Re: ASCE 7-95 Partially Enclosed Buildings

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James,

     Windows could be open on one side and close on the other by accident.
Even if all are open internal pressures could still develop, especially on
the insides of the leewward roof.


Alex C. Nacionales

From: Balmer James <James.Balmer(--nospam--at)rsandh.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Friday, February 15, 2002 7:19 AM
Subject: ASCE 7-95 Partially Enclosed Buildings


> Table 6-7 of ASCE 7-95 list the GCpi for the three different enclosure
> classifications.  The greatest values are for partially enclosed
buildings.
> From the definitions, I gather that partially enclosed buildings have
+110%
> openings in one wall as compared to the sum of the remainder of the
> building.  Similarly, if I have a balloon w/ one large opening and several
> much smaller openings, I can force air into the large opening and develop
> large internal pressure (partially enclosed).  However, if I have roughly
> equally sized openings and force air into one of them, I can not develop
the
> internal pressures. (enclosed)
>
> Does this make sense?  If I can make certain that a structure does not fit
> within the definition of partially enclosed (insure one of two provision
in
> enclosed bldg is not met), than I can work using the lower GCpi values of
> enclosed buildings.
>
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