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Telephone exchanges shall provide ventilation access for removal of toxic gases from the facility as follows:
(a) Every one story telephone exchange consisting of no more than 1,600 square feet of area shall provide no less than two separate physical openings of 16 square feet each or greater on separate sides of the facility.
(b) Every telephone exchange exceeding one story or 1,600 square feet in floor area shall provide at least two vent access openings per floor. The minimum size of each opening shall be 16 square feet for each 10,000 square feet of floor area. Multiple vent openings per floor shall not be necessary where mechanical smoke evacuation systems are provided.
(Added Coun. J. 11-2-94, p. 58476)