At the edge of a 2 hour rated slab to exterior wall connection, there is a 3/4" gap between the back of sheathing of the metal stud exterior unrated wall and the edge of slab. What firestopping detail do you recommend for this condition? Would the metal stud track alone be sufficient to stop the passage of fire and smoke?
Thanks for your firestop request. Looking at provided detail, we can address the joint per our listed systems HI/BP 120-04, or HI/BP 120-05. I have attached system HI/BP 120-04 for your review. If the elements on these systems are not matching with your site conditions, we can also 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.)
Shazi Shahabi
Fire Protection Engineering TeamHilti North America
3701 W. Royal Lane,
Suite 100 I Irving, TX, 75063
P 1-800-879-8000 I
F 918-254-1679
E usfirestopeng@hilti.com
www.us.hilti.com/firestop
