415.11.1.6 Ventilation.
BC § 415.11.1.6
Mechanical exhaust ventilation at the rate of not less than 1 cubic foot per minute per square foot (0.0051 m 3 /(s · m 2 )) of floor area shall be provided throughout portions of the fabrication area where HPM are used or stored. The exhaust air duct system of one fabrication area shall not connect to another duct system outside that fabrication area within the building. A ventilation system shall be provided to capture and exhaust fumes and vapors at workstations. Two or more operations at a workstation shall not be connected to the same exhaust system where either one or the combination of the substances removed could constitute a fire, explosion or hazardous chemical reaction within the exhaust duct system. Exhaust ducts penetrating fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711 shall be contained in a shaft of equivalent fire-resistance-rated construction. Exhaust ducts shall not penetrate fire walls. Fire dampers shall not be installed in exhaust ducts.
