Fire stopping Wall Penetrations at an angle

Question

Posted by Rustyover 7 years ago

The local fire marshal requires all penetrations be made at a 90 degree angle to the wall. Do you have literature describing an angular wall penetration method?

Firestop,wall penetration

2 Replies

Posted by Dakotaover 7 years ago

Hello Rusty,

UL published Guide Information related to Through Penetration Firestop Systems. Looking at page 2 of this document; specifically, the second paragraph under the table on page 2, it states that uninsulated penetrating items that meet all other specifications in a UL design can be installed at any angle.

As for non-metallic penetrations, we have UL System W-L-2340, and W-L-2128. These speak on how to address up to 4” PVC (Sch. 40) plastic piping, ABS plastic piping, and CPVC plastic piping.

Any other penetration would either need to be installed at a 90-degree angle, or we can look at addressing your application through an engineering judgement.

I have attached the UL guide info, UL system W-L-2340, UL system W-L-2128, as well as an engineering judgement request form. If an engineering judgement needs to be requested please fill out the request form and email it back to USFIRESTOPENG@HILTI.COM.

Have a great day and let us know if there are any other questions.

Regards,

Dakota Reid

Fire Protection Engineer

XHEZ Guide Info - Through Penetrations_UL 1479.pdf151.14 KB

New Hilti EJ Request Form.pdf1.83 MB

WL2340c.pdf149.1 KB

WL2128g.pdf112.55 KB

4 comments on this reply

Posted by JESSICA STARKSalmost 3 years ago

Are you referring to WL2340? If so, no, we do not have that solution with wood studs, but we certainly could provide you that solution on an engineering judgment (EJ), which will be a custom detail showing your exact application with the firestop components required to maintain the stated ratings. Hilti is proud to announce the launch of our engineering website, the HILTI CONSTRUCTION PLATFORM (HCP). This platform will be the home for all of your Fire Protection Engineering needs, including Engineering Judgment requests. You can find more information on how to access this new platform here: https://www.hilti.com/ej (US) or https://www.hilti.ca/ej (Canada.) Thank you!

Posted by Carey Fitcheralmost 3 years ago

Question regarding this UL Judgement. The four inch pipe UL only mentions the use in metal stud framing. Is there a UL out there that covers this detail in wood framing for up to 4?

Posted by Dakotaabout 5 years ago

Hello, The penetrating item should be installed per a UL/cUL listed system. For metallic pipe penetrations W-L-1054 is probably our most common system for a gypsum wall, or W-J-1067 for a concrete/CMU wall. If neither of these systems work you can also go to https://www.hilti.com/firestops and utilize the search filters in order to try and locate a system. If you cannot find a system to match your specific application needs you will need to submit for an engineering judgement. You can now do this through our new HILTI CONSTRUCTION PLATFORM (HCP). This platform will be the home for all of your Fire Protection Engineering needs, including Engineering Judgment requests. You can find more information on how to access this new platform here: https://www.hilti.com/content/hilti/W1/US/en/engineering/design-centers/firestop/engineering-judgments.html (US) or https://www.hilti.ca/content/hilti/W1/CA/en/engineering/design-centers/firestop/engineering-judgments.html (Canada.) For instructions on how to register along with how to navigate the new platform, please see the attached document: EJ FAQ. If you have any questions, please reach out to our customer service team at 1-800-879-8000 for assistance. Regards, Dakota Reid Fire Protection Engineer

Posted by Zaida about 5 years ago

The detail provided applies to Cast Iron Pipe as well? I kow there is no angle limitation in the metal pipe. , But other than that is anything that It needs to be taking into consideration? Maximun pipe diameter? Thanks