The NBC/BCBC/VBBL have requirements for a mechanical exhaust system in Article 3.2.8.7. if the prescriptive requirements for interconnected floors are being met. This requires that the air is removed at 4 air changes per hour.
Note: The OBC requirements are vastly different for interconnected floors
My question is: what volume of air is used in the calculation? Is it the entire floor? Can I exclude areas separated with a smoke 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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