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RE: 1/3 stress increase for 5 psf interior wind load

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Last time I heard a reason for this load was for resisting water pressure
from a firefighting hose. It is intended to keep the walls standing while
firefighters are fighting a fire inside the building. 

	-----Original Message-----
	From:	Dan Vines [SMTP:dan(--nospam--at)willettengineering.com]
	Sent:	Monday, November 29, 1999 1:15 PM
	To:	seaint(--nospam--at)seaint.org
	Subject:	1/3 stress increase for 5 psf interior wind load

	I have designed (picked out of a catalog, really) interior load
bearing metal studs for a small office type structure.
	 
	Dale/Incor, in their catalog, provides allowable axial loads for
various stud sizes at various heights under various wind loading condtions
(other manufacturers provide the same info).  Anyway, they have a footnote
that states: 
	 
	For components subjected to 5 psf and greater lateral wind loads,
the actual bending and axial stresses were multiplied by 0.75 in accordance
with AISI Section A4.4
	 
	AISI sect. A4.4 states:  Where load combinations specified by the
applicable building code include wind or eq loads, the resulting forces may
be multiplied by 0.75.
	 
	The question is:  does the 5 psf interior wall loading prescribed by
code constitute a WIND load.  My boss and I both think so, but I would love
a second, third, or twelfth opinion.
	 
	Thanks
	Dan
	 
	Sherman D. (Dan) Vines
	Willett Engineering Co., Inc.
	dan(--nospam--at)willettengineering.com <mailto:dan(--nospam--at)willettengineering.com>