1. Remove door and frame to Corridor 17. 2. Infill wall opening with 8” reinforced CMU. Reinforcing is two #4 bars every third block course, doweled 4” into existing wall. 3. Remove hand sink and floor drain. Cap plumbing penetrations in wall and below floor. 4. Cut opening in existing 8” concrete wall for new 3’-4” wide x 6’-8” tall hollow metal cased opening. 5. For the existing 6” and 8” CMU walls (total of three walls) and to create a secured ceiling element, over the entire room-side surface of the walls and to the bottom of the existing steel bar joists install 3/16” expanded metal with a maximum grid opening of 1” x 3” and weighing a minimum of 4.27 pounds per square foot. The new expanded metal shall applied and fastened to the existing CMU walls and steel bar joists so that destruction of the existing and reinforcing materials is required to remove them. 6. For the existing floor, over the entire surface install Marsten, Irving or pierced steel planking. The new steel planking shall applied and fastened to the existing CMU walls so that destruction of the existing and reinforcing materials is required to remove them. 7. Install new dehumidifier piped to existing drain. New dehumidifier is to be sized to serve both the existing vault and the expansion area (approximately 5,915 cubic feet). 8. New LED lighting fixtures in existing vault and to bottom of expanded metal in expansion area. 9. Electrical subcontractor to provide conduit as required for use by Electronic Security Systems. See Item 10 below. 10. Owner’s Electronic Security Systems vendor to install new sensors and alarms as necessary to secure the existing and expansion areas of the vault. 11. Paint all surfaces receiving work to match existing colors.
