Section 370.2760  Hazardous Areas

a)         Walls at enclosure of hazardous areas shall have a one-hour fire resistive rating. Doors at enclosure of hazardous areas shall be a minimum of one and three-eights (1⅜) inch thick solid core wood or equivalent and be self closing.

b)         Hazardous areas include the following:

1)         Kitchens

2)         Furnace and heater rooms

3)         Laundries

4)         Rooms or spaces, including repair shops, used for the storage of combustible supplies and equipment in quantities deemed hazardous by the authority having jurisdiction.