Approval of Change Order #3 – Tricon Construction Group – Water Treatment Facility Upgrade — E-3

Typical Fire Damper Installation  Vertical Mount Horizontal Mount See UL Listed Installation instructions for complete installation details SUGGESTED SPECIFICATION Furnish and install at locations shown on the plans, or as described in schedules for curtain type fire dampers suitable for vertical wall or horizontal masonry floor or ceiling. Static fire dampers tested, constructed and labeled in accordance with the latest edition of UL Standard 555. Dampers shall have a fire rating of 1 1/2 hours or 3 hours and shall meet the requirements of the latest edition of NFPA90A. Damper frame and blades shall be galvanized steel in gauges required by UL listing R-25410 installed in a factory mounted sleeve and shipped loose mounting angle. Damper blades shall be steel interlock to provide fire shield in gauges required by UL listing R-25410. Horizontal Mount units closure spring dampers shall be of 301 stainless steel and shall be constant force type. Each static fire damper shall include a steel sleeve and mounting angles furnished by the damper manufacturer to ensure appropriate installation. Submittal information shall include the manufacturer's UL installation instructions. The dampers shall be installed in accordance with the manufacturer's UL installation instructions. Static fire dampers shall be in all respects equivalent to United Enertech FD-B. Each damper shall include a 165°F (74°C), or 212°F (100°C) fusible link and shall be labeled for use in static systems. Static fire dampers shall be United Enertech model FD-B. (Consult United Enertech for detailed CSI MasterFormat Specifications).