ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Dimmable LED 2x4 lay in fixtures
by HotLine1. 04/24/17 05:43 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
How do you find a good employee?
by HotLine1. 04/22/17 10:44 AM
Electrode boilers question
by SteveFehr. 04/21/17 08:32 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,707 Are you busy
169,453 Re: Forum
162,762 Need opinion
Who's Online Now
0 registered members (), 66 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#154291 - 01/26/05 02:52 AM Fire-stopping at multiple conduit penetrations.  
e57  Offline
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

#154292 - 01/26/05 11:07 AM Re: Fire-stopping at multiple conduit penetrations.  
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


#154293 - 01/26/05 12:19 PM Re: Fire-stopping at multiple conduit penetrations.  
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


Member Spotlight
HappyElectrician
HappyElectrician
Penn USA
Posts: 31
Joined: December 2011
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.009s Queries: 14 (0.002s) Memory: 0.7532 MB (Peak: 0.8765 MB) Zlib enabled. Server Time: 2017-04-26 06:10:36 UTC