Firestop

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newinspector1

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I went to a job today where the electrician ran his conduit up to the fireblock and then put a 45 degree angle to avoid the fireblock and go the rest of the way up. This is going to make the conduit part of the sheetrock wall. Is this allowed? Will this maintain the fire rating? I usually see the conduit going through the fireblock and then fire caulk around the penetration.
 
newinspector1 said:
This is going to make the conduit part of the sheetrock wall. Is this allowed? Will this maintain the fire rating? I usually see the conduit going through the fireblock and then fire caulk around the penetration.
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If I understand the question correctly, I'm picturing the conduit penetrating the sheetrock. This would be a membrane penetration in a rated assembly and would be allowed as long as a listed firestop system was used to seal the annular space around the conduit thereby maintaining the integrity of the assembly.

If the wall is not required to be rated, then it is not an issue. The block at the top of the wall that the conduit has gone around would simply be to comply with the requirement that concealed spaces must be fire blocked every 10ft vertically and horizontally. Unless I misunderstood the scenario, that would be my position.
 
I'm going to go with construct on this one. I may have a different answer if I saw a picture, but if it's a rated lid it doesn't matter if he goes through the block or the dry wall he still has a penetration as construct said.
 
I can?t believe that you didn?t go to the drawings and look for a penetration detail on the engineered drawings. My understanding is that a diagonal run of a penetration is not normal and not listed.

OK, so no plans were available not unusual. Around these parts it?s SOP to show a detail and describe the process of securing the penetration.

Here?s a nice link that chases a lot of UL listed applications & IBC -w/UL certifications. Another sharp page is this one of the Fire Resistance Design Wizard

Note: ?Guide Information? on the first link; there is list at the bottom that describes what the other UL listings are for various penetrations. In your case open up everything to suit your needs!

Granted your not inspecting for UL, but this might help in the future.
 
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