Specifications include, but are not limited to: 2.1 WINDOW PERFORMANCE REQUIREMENTS A. Product Standard: Comply with AAMA/WDMA/CSA 101/I.S.2/A440 for definitions and minimum standards of performance, materials, components, accessories, and fabrication unless more stringent requirements are indicated. 1. Window Certification: AAMA certified with label attached to each window. B. Performance Class and Grade: AAMA/WDMA/CSA 101/I.S.2/A440 as follows: 1. Minimum Performance Class: AW. 2. Minimum Performance Grade: 60. C. Thermal Transmittance: NFRC 100 maximum whole-window U-factor of 0.35 Btu/sq. ft. x h x deg F. D. Solar Heat-Gain Coefficient (SHGC): NFRC 200 maximum whole-window SHGC of 0.25. E. Condensation-Resistance Factor (CRF): Provide aluminum windows tested for thermal performance according to AAMA 1503, showing a CRF of 50 minimum. F. Thermal Movements: Provide aluminum windows, including anchorage, that allow for thermal movements resulting from the following maximum change (range) in ambient and surface temperatures by preventing buckling, opening of joints, overstressing of components, failure of joint sealants, failure of connections, and other detrimental effects. Base engineering calculation on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss. 1. Temperature Change: 120 deg F ambient; 180 deg F material surfaces. 2.2 ALUMINUM WINDOWS A. Basis-of-Design Product: Subject to compliance with requirements, provide Winco Window Company, Inc.; Series 1450S, or a comparable product by one of the following: 1. EFCO Corporation; Series 6615. 2. TRACO; Series 9460. 3. Wausau Window and Wall Systems; Apogee Wausau Group, Inc.; Series 4250i. B. Types: Provide the following types in locations indicated on Drawings: 1. Fixed, simulated single-hung, with offset sash meeting rail. C. Frames and Sashes: Aluminum extrusions complying with AAMA/WDMA/CSA 101/I.S.2/A440. 1. Thermally Improved Construction: Fabricate frames, sashes, and muntins with an integral, concealed, low-conductance thermal barrier located between exterior materials and window members exposed on interior side in a manner that eliminates direct metal-to-metal contact. D. Insulating-Glass Units: ASTM E2190. 1. Glass: ASTM C1036, Type 1, Class 1, q3. a. Tint: Gray outer lite. b. Tint: Clear inner lite. c. Kind: Fully tempered where indicated on Drawings. 2. Overall Unit Thickness: 1 inch. 3. Minimum Thickness of Each Glass Lite: 6 mm. 4. Interspace Content: Air. 5. Low-E Coating: Sputtered on second surface. 6. Winter Nighttime U-Factor: 0.28 maximum. 7. Visible Light Transmittance: 46 percent minimum. 8. Solar Heat Gain Coefficient: 0.23 maximum. 9. Provide safety glazing labeling. E. Decorative Film Overlay: Translucent, dimensionally stable, cast PVC film, 2-mil- minimum thickness, with pressure-sensitive, clear adhesive back for adhering to glass and releasable protective backing. 1. Manufacturers: Subject to compliance with requirements, provide products by one of the following: a. 3M. b. Avery Dennison Corporation; Graphics Solutions Division. c. Decorative Films, LLC. d. Eastman Performance Films, LLC. e. FDC Graphic Films, Inc. 2. Patterns: As selected by Architect from manufacturer’s full line of products. F. Weather Stripping: Provide full-perimeter weather stripping for each sash unless otherwise indicated. G. Fasteners: Noncorrosive and compatible with window members, trim, hardware, anchors, and other components. 1. Exposed Fasteners: Do not use exposed fasteners to greatest extent possible. For application of hardware, use fasteners that match finish hardware being fastened. 2.3 ACCESSORIES A. Aluminum Back Dams: Extruded aluminum, ASTM B221, Alloy 6063-T6. 1. Size: 1-1/2 by 1-1/2 inches by continuous length between window jambs. 2. Finish: As-fabricated, AA-M12. B. Simulated Muntins: Double muntin system to simulate a true muntin appearance. Align muntins within the window system and from window to window within an industry acceptable tolerance. 1. Exterior Grids: 0.312-inch hollow extruded aluminum, trapezoidal shaped, finish to match the window frame. a. Grid Size: 3/4 inches wide by 5/16 inch thick, with 51 degree sloped edges. b. Attach grids without exposed fasteners. c. Mechanically fasten to beveled exterior integral glazing leg with concealed stainless steel drive pins at each contact point. Simulated drop-in muntin grids between the glazing and the glazing stop are not acceptable. d. Machine and mechanically fasten intersections of the muntin grids. e. Surface applied muntins with adhesive to glass are not acceptable. f. Spring loaded or clipped in exterior muntin grids are not acceptable. 2. Interior Grids: As detailed. Match width of exterior grids. C. Interior Trim: Extruded-aluminum profiles in sizes and configurations indicated on Drawings. D. Panning Trim: Extruded-aluminum profiles in sizes and configurations indicated on Drawings. 1. Design and fabricate panning assemblies to channel water penetrating the window or panning trim to the drainage plane. 2. Panning shall be sealed watertight to the frame. 3. Provide concealed fasteners. 4. Exterior panning shall contain an integral, water tight sealant and backer rod leg projecting at least 3/4-inch into the sealed joint. 5. Panning profile shall be used only at the jambs and head. Sill extension shall be fabricated in straight breaks of metal, and shall extend slightly beyond the outer edge of the jamb panning. Slope the sill away from the window 5 to 15 degrees. E. Sill Pans: Provide sill pans to capture moisture and direct leakage into the drainage cavity or to the exterior of the structure. 1. Sill pans to be stainless steel, aluminum, or adhered flexible flashing. 2. Sill pans to have back dams and end dams equal to or exceeding the minimum specified field water leakage testing design pressure, but not less than 1-1/4 inches high. 3. End dams shall be mechanically attached with horizontal screws. a. No mechanical attachments are allowed through the horizontal leg of the pan. End dams shall be sealed water tight. b. Metallic end dams shall be welded and soldered. 4. Jamb flashing should be shingle lapped into the sill pan such that leakage at the jambs can be directed into the sill pan. 5. Blind seals through the sill pan are not allowed. 6. Remove and reinstall broken fasteners. F. Spray Polyurethane Foam Insulation: ASTM C 1029, Type II, closed cell, with maximum flame-spread and smoke-developed indexes of 75 and 450, respectively, per ASTM E 84.
