Suggested Division 15 Specifications AeroBlade Steel Supply Grilles Model Description 131RS Steel supply grilles shall be TITUS AeroBlade Series Model 131R (single deflection) for the sizes and mounting types as shown on he plans and outlet schedule. The deflection blades shall be available parallel to the short dimension of the grille. All supply grilles shall be constructed with a 1¼-inch wide steel border having a minimum thickness of 20-gauge. Corners shall be assembled with full penetration resistance welds with a reinforcing steel patch for extra strength. Screw holes shall be countersunk for a neat appearance. Blades shall be constructed of heavy duty aluminum and shall be contoured to a specifically designed airfoil cross-section to meet published performance data. Hollow blades are not acceptable. Blades must be solid. Blades shall be spaced 3 inches apart. Blades shall extend completely through the side frame on each side to ensure stability throughout the complete cfm operating range of the grille. Blades shall be individually adjustable without loosening or rattling and shall be securely held in place with tension wire. Optional opposed blade volume damper shall be constructed of heavy gauge steel. Damper must be operable from the face of the grille. The grille finish shall be #26 white. The finish shall be an anodic acrylic paint, baked at 315°F for 30 minutes. The pencil hardness must be HB to H. The paint must pass a 100-hour ASTM B117 Corrosive Environments Salt Spray Test without creepage, blistering, or deterioration of film. The paint must pass a 250-hour ASTM D870 Water Immersion Test. The paint must also pass the ASTM D2794 Reverse Impact Cracking Test with a 50-inch pound force applied. The manufacturer shall provide published performance data for the grille. The grille shall be tested in accordance with ANSI/ASHRAE Standard 70-1991.