Conn. Agencies Regs. § 29-357-19a.2
The exterior and doors are to be constructed of not less than 1/4 inch steel and lined with at least (2) two inches of hardwood. Magazines with top openings will have lids with water resistant seals or which overlap the sides by at least one inch when in a closed position.
Type II magazine. Shall be of either masonry construction, or metal covered wood or fabricated metal. The exterior and doors shall be constructed of not less than 1/8 inch metal and lined with a non-sparking material.
Wood construction magazines shall have exterior and doors constructed of not less than (2) two inch hardwood and shall be braced at corners. They should be covered with not less than twenty gauge sheet metal.
The interior of magazines shall be lined with non-sparking material. The spark producing metal shall be exposed below the top of walls in the interior.
All nails shall be blind nailed or counter sunk.
Conn. Agencies Regs. § 29-357-19a.2