Is there a ul for a 3 5/8 metal wall, with 1 1/4 plaster on each side

Hello Hilti is not able to tell you if your specific wall is rated or unrated. You would need to work with your architect, local AHJ or the wall manufacturer to determine if the wall is rated. If the wall is rated we are able to assist with the firestopping through it in the form of an Engineering Judgement (EJ).

Thank you,
Chase Hellan
Sr. Fire Protection Engineer