WAC 296-52-70065. Explosives day box

(1) A day box for explosives must: (a) Be fire, weather, and theft resistant; (b) Be used in a manner that safely separates detonators from other explosives; (c) Be constructed of a minimum of number 12 gauge (.1046 inches) steel; (d) Be lined with at least either 1/2-inch plywood or 1/2-inch masonite-type hardboard; (e) Have doors that overlap the sides by a minimum of one inch; (f) Have appropriate ground slope for drainage. (2) Hinges and hasps must be attached by: (a) Welding; (b) Riveting; or (c) Bolting nuts on the inside of the door. (3) One steel padlock, which does not need to be protected by a steel hood, having a minimum of five tumblers and a case hardened shackle of a minimum of 3/8-inch diameter is sufficient for locking purposes.