We have square duct, fiberglass insulated with maskit that penetration block wall which is a smoke partition, and the USACE is requesting an UL on it. We used White tube of FS-one max High Performance Intumescent firestop sealant. Need this as soon as possible trying to get our overhead ceiling inspection with fire chief.
Denise,
Thank you for reaching out to the Hilti Fire Protection Design Team to assist you with your firestop engineering needs. I have attached a couple of systems that may work for your application utilizing Hilti FS-ONE MAX. If these systems do not work, then we would need to address your application through an Engineering Judgment, 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.)
Along with HCP, Hilti is excited to announce our new mobile app for all your firestop needs: Hilti Firestop Selector. Using the Firestop Selector app gives you easy access to the Hilti Fire Protection Design Team from the jobsite, on the road, or in the office to request a new EJ, an EJ Revision, or ask a Question anytime, anywhere.
If you have any questions, please reach out to our customer service team at 1-800-879-8000 (US) or 1-800-363-4458 (Canada) for assistance.
Thank you,
Jessica Starks
Senior Fire Protection Engineer
