OSHA 29 CFR 1910.106 (d)(3)(i&ii):
Design, construction, and capacity of safety storage cabinets -(I)
Maximum capacity. Not more than 60 gallons of Class I or Class II
liquids, nor more than 120 gallons of Class III liquids may be stored in
a storage cabinet.
(ii) Fire resistance. Storage cabinets shall be designed and
constructed to limit the internal temperature to not more than 325°F
when subjected to a 10-minute fire test using the standard
time-temperature curve as set forth in Standard Methods of Fire Tests of
Building Construction and Materials, NFPA 251-1969. All joints and seams
shall remain tight and the door shall remain securely closed during the
fire test. Cabinets shall be labeled in conspicuous lettering,
FLAMMABLE-KEEP FIRE AWAY.
(a) Metal cabinets constructed in the following manner shall be deemed
to be in compliance. The bottom, top, door, and sides of cabinet shall
be at least No. 18 gauge sheet iron and double walled with 1½-inch air
space. Joints shall be riveted, welded, or made tight by some equally
effective means. The door shall be provided with a three-point lock, and
a door sill shall be raised at least 2 inches above the bottom of the
Uniform Fire Code 79.201:
(g) Storage Cabinets. 1. General. When provisions of this code
require that liquid containers be stored in storage cabinets, such
cabinets, and storage shall be in accordance with this section.
Cabinets shall be conspicuously labeled in red letters on contrasting
background FLAMMABLE - KEEP FIRE AWAY.
2. Quantities. The quantity of Class I or Class II liquids
shall not exceed 60 gallons and the total quantities of all liquids in
a storage cabinet shall not exceed 120 gallons.
3. Construction. Cabinets may be constructed of wood or metal.
Cabinets shall be listed or constructed in accordance with the
A. Unlisted metal cabinets. Metal cabinets shall be of steel
having a thickness of not less than 0.043 inch. The cabinet, including
the door, shall be double walled with 1½-inch air space between the
walls. Joints shall be riveted or welded and shall be tight fitting.
Doors shall be well fitted, self-closing, and equipped with a latching
device. The bottom of the cabinets shall be liquid-tight to a height of
at least two inches.