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RE: Roof Deck Personnel loading

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Steel Deck Institute Specifications require that decks be capable of 
supporting a 200 pound concentrated load at mid-span with a maximum 
deflection of l/240 for the maximum span listed in the "Recommended Maximum 
Spans for Construction and Maintenance Loads Standard for 1 1/2" and 3" 
Roof Deck".  That table is usually in catalogs of deck manufacturers.  I 
assume they are distributing the load over the same area as ASCE 7 or IBC 
2000 would.  If you are looking for more definitive information, I suggest 
contacting a deck manufacturer or Steel Deck Institute.

Roger C. Davis
SDS Architects, Inc.

-----Original Message-----
From:	Ron Hill [SMTP:ronhill(--nospam--at)]
Sent:	Friday, September 20, 2002 10:37 AM
To:	Seaint@Seaint. Org
Subject:	Roof Deck Personnel loading

I have a question about roof decks and 30 psf live loading.  I have
looked in the codes and in the manufacturers data concerning permissible
personnel loading on roof decks and can not find anything.

When we design a roof for a uniform live load of 30 psf, how does that
correlate to how many men can stand in one area on the roof at any given

Ronald A. Hill, P.E.
HILL Consulting Engineering
PO BOX 26525
Birmingham, Alabama 35260 USA
Phone: 205-823-4784
FAX: 205-823-4145
email: ronhill(--nospam--at)

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