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Shaft enclosure for HVAC Ducts penetrating floor

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bp99

Civil/Environmental
Joined
Oct 1, 2003
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7
Location
US
I have an HVAC duct penetrating a concrete floor from a H occupancy below to a B occupancy above. A fire and smoke damper has been installed at the floor penetration. I was wondering if a shaft enclosure is also required by the code? If so, what section of the code requires this and what are ways of meeting the code?
 
I know our state and local codes allow (in general) to penetrate one floor (and serve 2) with a fire damper at the floor line. Shafts are required when going through more than one floor. I'd check your local code though.
 
Thanks for your response. Do you know if an H occupancy makes any difference?
 
bp99

If you are using a code based on the ICC system, you need to determine if the building is constructed using separated contruction or non-separated.
Separated construction uses fire rated separations to define different areas in the building that use construction based on the individual space occupancies.
Un-separated construction uses the most restricitive occupancy (construction) through out the building.

Greg
 
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