We have a project where the contractor did not run the 5/8" type X continuously on the inside of a required 1 hour 2x6 wood framed exterior wall (needs to be rated from both sides) and installed the stringer directly to the studs, then butt the Type X to the stringer. Is there a solution to retro-actively fire-rate this membrane penetration? There is 2x6 horizontal blocking at the top of the stair stinger the full length. The wall is also insulated.
Jennifer,
Thank you for reaching out to the Hilti Fire Protection Design Team to assist you with your firestop engineering
needs.
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.)
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. You can download the app using the appropriate link below.
Hilti Firestop Selector App – Google Play Store
Hilti Firestop Selector App – Apple App Store
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