We need to install firestopping from below to close pipe and duct penetrations through the ceiling slab of this unit, and have no access to the top surface of the slab. The penetration does not occur within a wall cavity. Construction Floor assembly is 8" thick concrete floor slab. We have two conditions. 1) At the Floor slab, we have a Fire rating requirement of 2-hr. 2) At the Roof Slab, we have a fire rating requirement of 1-hr. The penetrations are metallic pipe 6" dia. max. Can you tell us an appropriate Hilti product for this application? We will also need the UL listing for this condition. Thank you for your help.
Hello,
Please see the attached Hilti Firestop systems for your reference. C-AJ-7103 and C-AJ-7104 should get you where you need to go with the ducts and C-AJ-1184 should work for your metallic pipe. If you have any further questions please reach out through the Hilti Construction Platform.
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.
Thank you,
Travis Pearce
Fire Protection Design Team
