Every storey really should be ventilated by long term openings at Each individual auto parking level. The openings could be at ceiling level. The mixture totally free vent area must be no less than one/40 of that level's ground space, not less than 50 % of which should be presented https://fire-resisting-ductwork57788.blogstival.com/50350622/5-simple-statements-about-cibse-explained