At the interior of a 2hr duct shaft, the decking flutes are exposed communicating shaft to space voiding the 2hr envelope. What is the approved fire stopping method to fill / fire stop flutes.
The deck is concrete on metal corrugated decking, the shaft hole was cut leaving the bottom of the flutes open.
Hello,
Thank you for reaching out to the Hilti Fire Protection Design Team to assist you with your firestop engineering needs.
BW-S-0023 may be applicable for this condition; if not, we can 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.)
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,
Zach Rezazadeh
Fire Protection Engineer
