ECN Forum Forums Code Related Discussion NEC & other Code issues 334.10(3)

There is a fairly good description of fire rated suspended ceilings about halfway down this PDF
http://www.cgcinc.com/handbookAssets/PDFs/e/Handbook_12574_CP_C9.pdf

It looks like you can get 2 hours out of the good one. (U/L P237)

edit;
I assume you all understand a bunch of fire rated stuff does not make a fire rated assembly. (just squirting red caulk around) It has to be assembled exactly as tested and all the parts have to be there per the design spec. We got a good pitch on this from the USG guys at one of the BOAF conferences.
They have a selection of their stuff at http://www.usg.com/PerfRatedSysAction.do

The link seems to be broken but if you open up the USG Products link it will get you there. Look at performance rated systems.

[This message has been edited by gfretwell (edited 02-22-2007).]

Check on Local & state codes.

jd

Thanks for the information regarding suspended ceilings gfretwell....

shortcircuit

I was always under the impresssion that NM was ok in a commercial/ suspeneded ceiling as long as the space above the ceiling wasn't plenum-rated.

Prior to the 2002 code revision it was. Starting with the 2002 it was prohibited- 334.12(A)(1). That confused me also until I remembered that where I am in NY we are still using the 1999 code. People up there in Albany better get their "you know whats" in gear.

-Hal