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PUBLIC WORKS TEMPLATE FOR INFORMAL BIDDING ($100K) 12-04-25 REV: 12-15-25 MI 2.2 PANEL CONSTRUCTION A. Provide top reinforcement as required to support panel from suspension components and provide reinforcement for hardware attachment. Fabricate panels with tight hairline joints and concealed fasteners. Fabricate panels so finished in-place partition is rigid; plumb aligned, with tight joints and uniform appearance; and free of bow, warp, twist, deformation, and surface and finish irregularities. B. Welded steel panel construction, 3-1/2 inch thick. 1. Panels with this construction occur at Community Room. 2. Panels at Community Room shall have minimum 18-gauge(1.22-mm) steel face sheets, robotically fusion welded to 16-gauge(1.52-mm) vertical frame members and 14- gauge(1.9-mm) top rail. 3. Panel weight not to exceed 7.5 pounds per square foot. 4. Panels at Community Room shall be rated minimum 53 STC. If field sound tested, wall/s shall achieve a minimum 42 NIC when tested in accordance with ASTM E336, providing that the surrounding building construction is compatible with this rating. 5. Submit test report showing that trolley plate anchorage in test specimen (minimum 4-ft. wide and same construction as proposed for this project) is capable of withstanding a tensile load of 8,000 pounds applied via pendant bolt without failure. 6. Submit test report (minimum 4-ft. wide by 20-ft. long test specimen of the same construction as proposed for this project) showing that panel is capable of resisting a uniform load of 20 pounds per square foot applied normal to the panel face without permanent damage when tested in accordance with ASTM E-72. C. Panel Edge Trim 1. Panels at Community Room to be furnished with protective vertical edge trim that overlaps the panel face and secures finish at the vertical edge. D. Panel Trim Finish: 1. Panels located at Community Room shall have clear satin anodized panel trim. E. Hardware: Manufacturer's standard as required to activate operable panel partition and accessories; with decorative, protective finish to match panel trim finish. 2.3 SEALS A. General: Provide types of acoustical seals indicated that produce operable panel partitions with acoustical performance requirements and the following. 1. Seals made from materials and profiles that minimize sound leakage. 2. Seals fitting tight at contact surfaces and sealing continuously between adjacent panels and between operable panel partition perimeter and adjacent surfaces, when operable panel partition is extended, closed, and in place. B. Vertical Seals: Deep-nesting, interlocking astragals mounted on each edge of panel, with continuous PVC acoustical seals. C. Top Seals: Panel top seals shall be fixed, flexible multi-fin. D. Horizontal Bottom Seals 1. Panels at Community Room shall have mechanical, automatic, retractable bottom seals. Automatic floor seals shall accommodate a minimum 1'' operational clearance between the bottom of the panels and the floor. Seals shall be activated by the movement of panels into final setup position. Bottom seal shall be a cartridge, removable without cutting panel face. 2.4 FINISH FACING A. General: Provide finish facings that comply with indicated fire-test-response characteristics and that are factory applied to operable partitions with appropriate backing, using mildew-resistant non-staining adhesive. 1. Apply one-piece facings free from air bubbles, wrinkles, blisters, and other defects, with no gaps or overlaps. Tightly secure and conceal raw and selvage edges of facing for finished appearance.