Fire Rating Of Drop Ceiling - General Discussion - Contractor Talk

Fire Rating Of Drop Ceiling

 
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Old 04-29-2009, 07:26 AM   #1
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Fire Rating Of Drop Ceiling


The city's building office is requiring my client to inform them of the fire rating of the drop she has installed in order to get a CofO for a church that is in this particullar space. The ceiling has been installed for quite some time even before she owned the property, they are requiring a one hour rating ceiling. The only markings are on the back side and say USG and W. Im thinking that the W might stand for something. Does anyone have any imput as to how I can determine the rating of the ceiling.
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Old 04-29-2009, 07:37 AM   #2
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Re: Fire Rating Of Drop Ceiling


Google "one hour ceiling assemblies". Google USG and search for one hour asseblies. The standard is two layers of 5/8" type C or X depending on what your local person will accept.

If your existing ceiling had a rating there would be a UL # stamped on it.

I don't know if there is such a thing as a one hour suspended ceiling assembly. It would require all components like the wire it hangs from to be rated. Best bet is to search and find an assembly that works. It will spell out what is needed

IMO you are in for a new ceiling.

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Old 04-29-2009, 09:21 AM   #3
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Re: Fire Rating Of Drop Ceiling


Go to a large supplier in your area with one of the tiles. ISC around here. They will know immediately what tile it is and be able to give you the specs. I don't want to come across as a [email protected]$k, but I can see this is one of your first posts. If you really didn't think of what I have suggested then I am sorry, but if you're just trying to get a quick answer without having to do the obvious recon, it comes across to me as being lazy and that's not what this forum is designed for. Not throwing darts at you, just a heads up.
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Old 04-29-2009, 07:00 PM   #4
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Re: Fire Rating Of Drop Ceiling


USG is the largest manufacturer of building materials. Go on this webpage and get the rating for the drop ceiling you have.

http://www.usg.com/index.jsp

Good luck

Quote:
Originally Posted by shesaremonclus View Post
The city's building office is requiring my client to inform them of the fire rating of the drop she has installed in order to get a CofO for a church that is in this particullar space. The ceiling has been installed for quite some time even before she owned the property, they are requiring a one hour rating ceiling. The only markings are on the back side and say USG and W. Im thinking that the W might stand for something. Does anyone have any imput as to how I can determine the rating of the ceiling.
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Old 04-29-2009, 07:19 PM   #5
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Re: Fire Rating Of Drop Ceiling


Then, after the homework, go buy USG's fire rated panels. They are slightly more expensive than typical, but the only way you're going to get the rating you need (and the least expensive). Or, depending on your building dept. you can go super el cheapo and cut rated drywall sheets to fit
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Old 04-29-2009, 08:14 PM   #6
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Re: Fire Rating Of Drop Ceiling


Check this out.-----------> USG Suspended Ceilings (fire rated)
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Old 04-29-2009, 10:39 PM   #7
 
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Re: Fire Rating Of Drop Ceiling


I agree with Maca ... Macawabat... Macawaddatata ... I agree with MAC, your in for a new ceiling!
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Old 04-29-2009, 11:31 PM   #8
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Re: Fire Rating Of Drop Ceiling


N.Y. State 2003 code
706.3.5 Separation of occupancies. The fire barrier separating mixed
occupancies, or a single occupancy into different fire areas, shall have
a fire-resistance rating of not less than that indicated in 302.3.3
based on the occupancies being separated.

706.4 Continuity. Fire barriers shall extend from the top of the
floor/ceiling assembly below to the underside of the floor or roof slab or
deck above and shall be securely attached thereto. These walls shall be
continuous through concealed spaces such as the space above a suspended
ceiling. The supporting construction shall be protected to afford the
required fire-resistance rating of the fire barrier supported except for 1-
hour fire-resistance-rated incidental use area separations as required by
Table 302.1.1 in buildings of Types IIB, IIIB and VB construction.
Hollow vertical spaces within the fire barrier wall shall be firestopped at
every floor level.
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Old 04-30-2009, 07:02 AM   #9
 
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Re: Fire Rating Of Drop Ceiling


Hey guys thanks for this interesting post. This can solve my problem.

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