[F] 415.11.5 HPM Rooms, Gas Rooms, Liquid Storage Room Construction
Liquid storage rooms shall be constructed in accordance with the following requirements:
- Rooms greater than 500 square feet (46.5 m2) in area, shall have not fewer than one exterior door approved for fire department access.
- Rooms shall be separated from other areas by fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both. The fire-resistance rating shall be not less than 1 hour for rooms up to 150 square feet (13.9 m2) in area and not less than 2 hours where the room is more than 150 square feet (13.9 m2) in area.
- Shelving, racks and wainscotting in such areas shall be of noncombustible construction or wood of not less than 1-inch (25 mm) nominal thickness or fire-retardant-treated wood complying with Section 2303.2.
- Rooms used for the storage of Class I flammable liquids shall not be located in a basement.
Mechanical exhaust ventilation shall be provided in liquid storage rooms, HPM rooms and gas rooms at the rate of not less than 1 cubic foot per minute per square foot (0.044 L/s/m2) of floor area or six air changes per hour.