1. Remove door and frame to Drill Hall. 2. Infill wall opening with 12” reinforced CMU. Reinforcing is two #4 bars every third block course, doweled 4” into existing wall. 3. Remove hand sink, floor drain and shelf-mounted water heater. 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. Concept 1 - For the existing 8” and 12” 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.
