Check "Fire Resistance Design Manual" by Gypsum Association. GA File number
FC 5710 and 5724 list 2 hour assemblies with 2X10's @ 16" o.c. there is none
available, as far as I know, for 24" spacing.
Ben Yousefi, SE
San Jose, CA
From: Lutz,James [SMTP:JLUTZ(--nospam--at)earthtech.com]
Sent: Monday, June 12, 2000 3:30 PM
Subject: Ceiling Fire Protection
Is anyone aware of an assembly that would deliver a two hour fire
a ceiling supported by 2x or 3x joists at 24 inch centers? I thought
couple of layers of 5/8 inch Type X gypsum board would do it, but
not according to the UBC.
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