Fire Rated Double and Single Hung Steel Windows

The Window Man is proud to offer Northern Virginia residents and commercial property owners fire rated double and single hung steel doors by Optimum. Stop by one of The Window Man's three showrooms today to preview Optimum's SC7650 and SC7650 series windows and to consult with one of our representatives.

Series SC7650

Optimum's steel double and single hung windows have been proven to withstand temperatures in excess of 1650 degrees (900 degrees C) in laboratory tests. Even after 45 minutes of fire exposure all individual muntins, mullions, jamb members and sash components remained in position. Each window features two fusible link components made of slow melting alloy. When exposed to temperatures of 165 degrees or more, the links melt and automatically seal the window shut, which prevents the spread of smoke and fire to adjacent buildings.


SC7650 Series Specifications

General: Steel vertical sliding window shall be Series SC7650 as manufactured by Optimum Steel Window Corporation. All windows shall carry either an MEA and or Underwriters Laboratories, Inc. (UL) label for fire resistance rating of 45 minutes, in accordance with the standards for Fire Tests of Window Assemblies, ANSI/ UL9 (NFPA 257, ASTM El63). Materials: All principal cold rolled formed members shall be ASTM A528 Low Carbon Steel. Frame members shall have a minimum thickness of 20 gauge.

Weatherstripping: Sliding sash panels shall have EPDM gaskets throughout entire perimeter (unless otherwise noted).

Finish: All units shall be reasonably free from scratches and blemishes and have the following:

• Zinc Coating (ASTM A525 Z200) on both surfaces, applied by a continuous hot dipped process (The Sendzimir System), followed by a "skin pass" (smoothing) procedure which eliminates roughness.
• Primer consisting of epoxy-ureic paint, applied at a thickness of 5 microns on both surfaces.>
• Baked polyester powder coating, (baked at 180-200 degrees C for 18-20 minutes) with an average thickness of 80 microns.

Glazing: Windows shall be factory glazed with obscure or clear 1/4" wire glass. Lites shall have a minimum of 24 gauge wire with a maximum mesh size of one square inch as per Underwriters Laboratories requirements. Individual lites of glass shall not exceed a daylite dimension of 895 square inches each. Glass shall comply with ANSI Z97.l and ASTM C1036.

Construction: Frame to be formed of 20 gauge steel sections, with corners which are mechanically assembled and reinforced. Sash members shall be 20 gauge formed sections which are coped and assembled. Corner joints shall be fully scaled to prevent leakage. Horizontal muntins, when required, shall consist of two sections of 20 gauge forming an "H" Section. Approved 1/4" wire glass to be held in 3/4" uniform edge bite.

Hardware: Lower sliding panel shall be furnished with standard pull handles and sweep lock at meeting rail. A fusible link assembly attached directly to the front balancers, functions as the self-closing mechanism.

Installation: The installer shall set all window frames in a level, plumb and square condition without distortion. Units shall be promptly anchored, flashed and caulked in accordance with good window installation practice.