I have always interpreted Sentence 3.4.4.4.(1) as not permitting ducts to penetrate and exit fire separation as it is not a listed permitted penetration. But then I came across Sentence 6.9.2.4.(1) that states “where ducts penetrate fire separations separating exits from the remainder of the building, they shall be in accordance with Article 3.4.4.4.”
My question is: Is the provision in Part 6 an oversight? Or are duct penetrations permitted in an exit separation?
I am dealing with a system that is used to protect storage tanks at one of our industrial facilities, this system is an outdoor deluge
NBC 2015 Div B-9.8.9.5. Treads 1) Stair treads of lumber, plywood or O-2 grade OSB within dwelling units shall be not less than 25 mm
My question is: Is there ever a time that access needs to be provided around an entire building?
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