WAC 296-96-02570   How do we enforce hoistway ventilation?  (1) Area of vents. As required in International Building Code (IBC) 3004.3.1 and chapter 51-50 WAC, the area of the vents shall not be less than 3-1/2 percent of the area of the hoistway nor less than three square feet (0.28 m²) for each elevator car, and not less than 3-1/2 percent nor less than one-half square foot (0.047 m²) for each dumbwaiter car in the hoistway, whichever is greater. The total required vent area shall be equipped with dampers that remain powered closed until activated open by the fire alarm system panel. The dampers shall open upon loss of power.

     (2) Activation of the powered vent must not be from the same device that activates the phase one fire recall.

EXEMPTION:

Special purpose and residential elevators are exempt from this section.

[Statutory Authority: Chapter 70.87 RCW. 08-23-085, § 296-96-02570, filed 11/18/08, effective 12/19/08; 07-24-041, § 296-96-02570, filed 11/30/07, effective 1/1/08.]