I don't believe that would be the case. A listed fire resistant rated assembly can have all types of wall coverings applied to it including wood paneling and it doesn't negate the fact that the "base" assembly passed the fire resistance test.
There is more of an issue for the interior finish rating changing when a wall covering material that is tested and listed gets laminated to another material that may modify the flame spread and smoke developed rating. It may be possible, but IMHO, the change to the fire resistance rating should not be an issue when a covering is added to it. Peter -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of å... .... Sent: Tuesday, March 11, 2008 4:50 AM To: [email protected] Subject: vinyl covered vs paper covered gypsum wall board Back to part of the original question... There is still a suspicion that an otherwise listed and fire-rated gypboard wall system may have its listing invalidated (despite retaining the system FRR) if a plastic is laminated over the gypboard surface of this system. I wonder if the listing is invalidated despite the plastic laminate having the required interior finish ratings. If it is invalidated, then I believe this would be the place where an engineering judgment may come into play, as Steve mentioned in a thread a few days back. I am not trying to "make work" for some FPE. I just want to be sure of the definitions and the paths of the process. Your education efforts with me are seriously appreciated. scot deal excelsior fire _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
