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Fire-stopping at multiple conduit penetrations. #154291
01/26/05 01:52 AM
01/26/05 01:52 AM
E
e57  Offline OP
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
Anyone have any good ideas on how to penetrate firewalls with lets say a trappeze of 30+ 1/2" conduits with 1 1/8 spacing in an existing 2 hour wall?

Is there a fast way to do this?


Mark Heller
"Well - I oughta....." -Jackie Gleason
Building Codes & Related References
Re: Fire-stopping at multiple conduit penetrations. #154292
01/26/05 10:07 AM
01/26/05 10:07 AM
R
Roger  Offline
Member
Joined: May 2002
Posts: 1,716
N.C.
Mark, you may want to check out these pillows from 3M.

There are other products made by Rectorseal, Flame Stop, Hilti, to name a few.

Roger

Re: Fire-stopping at multiple conduit penetrations. #154293
01/26/05 11:19 AM
01/26/05 11:19 AM
S
sandsnow  Offline
Member
Joined: Sep 2004
Posts: 167
Irvine, CA, USA
e57
The best way to make the penetration is to call Hilti, 3M, Spec-Seal, etc. and tell them what you are penetrating and what you want to put through it. You will 99.9 % probably find that 30 plus will not be covered by a UL classified system. It sounds like it will probably be too large. New systems are being developed all the time, so I just might be wrong. You may be able to get through with one or more penetrations of multiples.

If you or the AHJ will accept it you can probably get some kind of engineering judgement from the manufacturer on this configuration. We do not accept "EJ's" because they do not comply with the Building Code.

I've looked at many penetrations through fire resistive construction, and the best advice I can give anyone is to plan the penetration with a manufactur rep BEFORE running the conduit through the wall or floor. Trying to find a system to match what you have done is hard.

I'm sorry there is no easy answer to your dilemna.


Larry LeVoir
Inspector
City of Irvine, CA

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