Magazine door construction

Openings to magazines shall be restricted to that necessary for the placement and removal of stocks of explosives. Doors shall be constructed of 3/8 inch plate steel and lined with 2-5/8 inches of hardwood. Hinges and hasps shall be attached to the doors by welding, riveting or bolting (nuts on inside of door). They shall be installed in such a manner that the hinges and hasps cannot be removed when the doors are closed and locked.