Dryer Vent Penetration Through a Fire-Rated Roof

[jar546]

Dryer Vent Penetration Through a Fire-Rated Roof​

Question:
What are the protection requirements for a dryer vent penetrating a fire-rated roof?

Details:
In a residential setting, a dryer on the top floor vents directly through a 1-hour fire-rated concrete roof using a 4-inch steel duct wrapped in a 1-hour fire-rated duct wrap. The duct passes through the roof without a fire damper.

Answer: **BECOME A SAWHORSE TO ACCESS THIS ANSWER** There is an entire private section just for Sawhorses, and not available to the public.

https://www.thebuildingcodeforum.com/forum/account/upgrades

 

[steveray]

Why is the roof rated? Construction type Ch. 6 or Ch. 7?.....Good thing I am a Sawhorse and can get my questions answered....

 

[jar546]

Why is the roof rated? Construction type Ch. 6 or Ch. 7?.....Good thing I am a Sawhorse and can get my questions answered....

Because, that's why. This is a question that the ICC answered. It is rated because it is rated in the question.