General: All aluminum windows furnished as shown in the plans shall conform to the H-AW55 and H-HC65 specifications in AAMA/WDMA/CSA 101/IS2/A440-08, and be furnished with all necessary hardware, trim and miscellaneous items as specified.
Material: Aluminum used is commercial quality 6063-T5 alloy with a minimum ultimate tensile strength of 22,000 psi, free from defects impairing strength and durability, and with standard wall tolerances as defined in the Architectural Aluminum Manufacturer’s Association Master Specifications for Aluminum Windows. All members of the frame and sash shall be split and bridged with a continuous structural thermal break of high density, low conductivity urethane insulation cavity fill, with removal of the extrusion cavity bridging aluminum upon curing.
Construction and Operation: Windows are assembled to perform as herein specified, be neat in appearance and weather tight. All sash and frame members are firmly joined with mechanical joints using stainless steel screws into integral screw ports. Each frame corner joint is secured with two screws. Sash corner joints are completely nested for rigidity and appearance. Meeting rails have mechanical interlocks, and the horizontal rails of the upper and lower sashes have extruded handles for operating the sashes. When windows are not being expressly used for ventilation, they must be fully closed and locked. Failure to do so may result in personal injury or damage to property. All windows have “hospital sills”, permitting raising the lower sash approx. 1 1/4″ with no daylight opening at sill. Sashes are tilt type for easy cleaning. Top sashes have “Anti-Creep” latch.
Glazing: Sashes are glazed with 1″ sealed insulated glass, using “Float Glass” quality, and be constructed to allow field replacement of glazing material. Glazing is “Marine” type wrap around vinyl gasket, and without removable beads or glazing compound. Insulated glass is in compliance with ASTM E 773-83 AN E 744-74A Class CBA.
Spacer: Quanex’s Super Spacer® contains NO-Metal and is one of the most thermatically efficient IG spacers available today. Super Spacer® reduces sealant stress while improving heat flow resistance, glass surface temperature, condensation resistance and sound absorption. Super Spacer® is the only polymer foam, NO-Metal warm edge spacer.
Finish: The exposed surfaces of all aluminum members shall be clean and free of serious blemishes, scratches or tool marks. Standard finish is electrostatically applied acrylic enamel with a 5-stage chromate under-coating conforming to AAMA 603.8 standard. Bronze, White, Black, Green and Beige are standard colors. Anodized, AAMA 605.2 painted and other architect specified finishes may be available at additional cost.
Hardware: All fasteners, screws and other miscellaneous fastening devices shall be of non-corrosive material compatible with aluminum. Balances of appropriate size and capacity to hold each sash stationary at open position are factory installed. They meet AAMA 902.2 specification, and are easily replaceable after the window is installed. Block and Tackle balances are standard. Optional “Ultra-Lift” balances at an additional cost.