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4'', 2hr. fire resistant rated floor.

Posted by Sean Sullivanabout 6 years ago
4'', 2hr. fire resistant rated floor.

Hello All,
I have a 4'' concrete, 2hr. fire resistant rated floor with three, 6'' penetrations that have multiple 1'' EMT running through them. There is 0'' to 2'' annular space in each penetration concerning the EMT and the periphery of the penetration. I am unable to reach the top of the penetrations, nor can I reach the bottom of the penetrations to place mineral wool. However, I do have a four foot long caulking gun I can use to reach the bottom of the penetrations. Is there a listed system available I could use to Firestop the penetrations with intumescent caulk from the bottom? Or an EJ available? Thank you...Sean.

Firestop,EJ

1 Reply
Posted by Jaeger Coxabout 6 years ago

Good afternoon Sean,

We can address your application through an engineering judgment (EJ) which will be a detail depicting your exact application with the firestop components to maintain the stated ratings.

Please see attached link for Hilti engineering judgment request form. Please fill out the form and email the completed form with any additional details to usfirestopeng@hilti.com

https://www.hilti.com/content/hilti/W1/US/en/engineering/design-centers/firestop/engineering-judgments.html?wcmmode=disabled

If you have any questions, comments, or concerns please feel free to let us know.

Thank you for choosing Hilti as your firestop specialist and have a great day.

Regards,

Jaeger Cox

engineering judgment (EJ)