Specifications include, but are not limited to: A. An SLT open storage area shall meet or exceed the construction requirements contained in this standard and have an intrusion detection system (IDS) installed that meets the standards cited herein. These criteria apply to all new construction, reconstruction, alterations, equipment modifications, and repairs of existing areas. This standard shall also be used in evaluating existing areas not previously approved for Secure Video Teleconference (SVTC) operations.B. The area shall be supported by security-in-depth consisting of a minimum of two additional layers of security. Examples of methods for achieving security-in-depth are:1. Military installations, embassy compounds, or contractor compounds with a dedicated response force of U.S. persons. A memorandum of understanding or agreement (MOU/MOA) shall be executed outlining response requirements for these facilities. 2. Enclosed vestibule outside of the secure area entrance equipped with an approved high security lock and UL listed alarm equipment installed in accordance with manufacturer’s instructions.3. Separate building access controls/alarms along with elevator controls (e.g., after hours card reader with audit capability) required to gain access to building or elevator. 4. Fenced, alarmed compound with access controlled vehicle gate and/or pedestrian gate. C. Doors1. Routine entrance/exit doors shall be kept to an absolute minimum. Where possible, only one single door shall be used for routine entry/exit.2. Doors shall be constructed of wood, metal, or other solid materials. When doors are used in pairs or a gap exposes the latching mechanism, an astragal (overlapping molding) shall be installed where the doors meet or exposure occurs. Hinges are preferred to be on the secure side of the door. Hinge pins that are exposed to the outer perimeter of the area shall be pinned, brazed, have set screws installed, or be spot-welded to preclude removal. All doors must meet the following criteria:a. Solid core wood, minimum 1 3/4" thick, or 16 gauge metal cladding over wood or composition material, installed in welded steel frame assembly mounted to 20-gauge or greater metal studs. Knock-down [collapsible jam and header] frame or aluminum frame is not acceptable.b. Doors and frames shall meet or exceed a Sound Transmission Class (STC) 45 equivalent rating in processing areas. Doors and frames shall meet or exceed an STC 50 equivalent rating in areas where there will be amplified sound. Doors shall have adjustable acoustical gasket around the door with an automatic threshold seal installed in these instances. c. Doors with windows, louvers, baffle plates, or similar openings are only authorized to be used in areas with no processing or discussion. They shall be secured with 18-gauge expanded metal securely fastened on the inside. If visual access is a factor, the windows shall be covered.
