can a shaftwall u415 be attached to a 1 hr rated wall U419
HILTI can provide direction in terms of firestopping the joint between a U415 shaft wall and a U419 gypsum wall (i.e. restoring the rating in the joint between the two assemblies). However, it is outside the scope of HILTI to provide direction on wall construction--that would need to be directed towards the drywall manufacturers and/or UL to determine if the attachment is allowed.
If you are looking for direction on the joint, this would require 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/content/hilti/W1/US/en/business/business/engineering/fire-protection/engineering-judgments.html (US) or https://www.hilti.ca/content/hilti/W1/CA/en/business/business/engineering/fire-protection/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.
Fire Protection Engineering Team
Hilti North America
