Posted by Garyalmost 5 years ago
fire stop system
I have a 4" cast iron pipe going through gypsum wall at an angle I need a UL listing for this ASAP
1 Reply
Posted by Jose Hernandezalmost 5 years ago
Hello,
The UL Guide Information for through penetrations states that uninsulated metallic pipes may be installed at any angle as long as the annular space of the system is maintained.
I have attached a copy of the UL guide information for through penetrations with the mentioned section highlighted in green on the second page. I have also attached our most common metallic pipe penetration system [W-L-1054]. As long as the 2-1/4" annular space is maintained around the pipe this system should work for your condition.
Thank you,
Alex Hernandez
