Mechanical · M-4ZA7J

Up Blast Exhaust Fan

Materials

Steel Cold-formed Steel Aluminum Metal (misc.)

Elements

Columns Roofs Decks Waterproofing / Flashing Insulation Site / Paving Anchors / Embeds Roof / Floor Openings

Connections

Welded Connection Deck Attachment

About this detail

An up blast exhaust fan features an aluminum housing containing the motor, drive, disconnect switch, pigtail cord, and internal wire post. The unit is secured to a leveled manufacturer's roof curb using number twelve self-tapping screws spaced at twelve inches on center with a minimum of two per side. The roof curb is anchored through its flange to the bare metal roof deck with number ten fasteners at six inches on center or at every top flute, whichever is less. A backdraft damper installs above the duct, while a galvanized sheet metal closure below the roof retains insulation packed into the opening around the duct.

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