will suffice as the second door. In this case, the outer door must be a solid core wooden or metal plate, or 6-gauge
steel mesh (equivalent of that specified for fabricated steel mesh cage construction) and welded onto a metal
When the steel mesh cage is not used, the doorway of the evidence room must be covered by two doors hung one
behind the other. One door may be constructed of a material of the type used for constructing a steel mesh cage
welded to a steel frame. The second door may be constructed of solid core wood, steel, or be a hollow wooden
door reinforced with a steel plate not less than 1/8-inch thick.
If a barred door is used, the vertical steel bars must be at least 3/8-inch thick and must not be spaced more than
four inches apart with horizontal bars welded to the vertical bars and spaced so that openings do not exceed 32
square inches. Either door may be hung on the outside of the doorway. The inner and outer doors must be hung
to prevent the door frame from being separated from the door casing.
Door hinges and pins should be installed on the inside; if not, they must be installed so doors cannot be removed
without seriously damaging the door or door jamb. All exposed hinge pins will be spot welded or branded to
prevent removal. This is not required when safety stud hinges are used or when the hinge pins are on the inside of
the doors. Specifications for construction of new evidence rooms must include these standards.
The outer door must be secured by one high security key padlock and hasp. The inner door must be secured by
one changeable combination padlock. The padlock for the outer door of the evidence room must conform to
military specifications MIL-P43607 (GL) (High Security Padlock) NSN 5340-00799-8248. The changeable
combination padlock for the inner door must conform to requirements of military specification FF-P-110
(Sergeant and Greenleaf padlock, 8077A/8078A series), is the minimum acceptable changeable combination lock
authorized. All locks must be used with heavy steel hasps and staples. The hasps and staples must be welded or
fastened to the door and door jamb with smooth headed bolts or rivets that penetrate the entire thickness of the
door or door jamb. The bolts or rivets must be spot welded or branded on the inside of the door or door facing to
prevent their being pulled out.
Fabricated Staples. Evidence depositories under 24-hour surveillance need have only one door. In this case, the
single door must be solid wood or covered with 1/8-inch steel plate. The same requirements on the padlock,
staples, and hasps exist as for a two-door depository.
Many custodians have found that locally fabricated staples for the high security padlock are made of soft steel.
Testing the strength of this staple is recommended. Can it be cut readily with a hand-held hacksaw blade? If it
can, it obviously is too soft.