Mechanical · G-SSJ4P

Mechanical Duct Penetration through Concrete Floor Over Metal Deck

Materials

Concrete Cold-formed Steel Metal (misc.)

Elements

Decks Anchors / Embeds

Connections

Deck Attachment

About this detail

A galvanized steel duct penetrates a concrete floor over metal deck assembly with a minimum thickness of four and one-half inches. The annular space around the duct is sealed using Hilti firestop sealant products such as FS-ONE MAX, CFS-S SIL GG, CP 601S, CP 606, or CFS-S SIL SL in accordance with UL System C-AJ-7084. Permissible duct sizes include a twenty-inch maximum diameter for twenty-four gauge galvanized spiral wound sheet metal duct and a twelve-inch maximum diameter for twenty-eight gauge galvanized sheet metal duct.

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