General: Steel horizontal sliding window shall be Series SC7600 as
manufactured by Optimum Steel Window Corporation. All windows shall carry either an
MEA or Underwriters Laboratories, Inc. (UL) fire resistance rating of 45 minutes in
accordance with the fire standards for Fire Tests of Window Assemblies, ANSI/UL9
(NFPA 257, ASTM E163).
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 panel shall have EPDM gaskets throughout entire perimeter (unless
otherwise noted).
Finish:
All units shall be reasonably free from scratches and blemishes having 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 a
thermosetting epoxy-ureic paint, applied at a thickness of 5 microns on both surfaces.
- Baked polyester powder coating,
(baked at 180-200° C for 18 to 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 and a maximum mesh size of one square inch, as per Underwriters
Laboratories requirements. Individual lites of glass shall not exceed a day lite
dimension of 895 square inches each. Glass shall comply with ANSI Z97.1 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 guage formed
sections which are coped and assembled. Corner joints shall be fully sealed to
prevent leakage. Vent sash shall roll on a 18 gauge track with 1/4"
diameter steel ball bearing rollers. Horizontal muntins, when required, shall
consist of two sections of 20 gauge steel forming an "H" section.
Approved 1/4 " wire glass to be held in a 3/4" uniform edge bite.
Hardware:
Sliding panel shall be furnished with a white bronze operating handle, which is
attached to the jamb of the operable sash. A spring activated automatic closing
device is used in conjunction with a 165 degree fusible link assembly mounted on the unit.
This assembly functions as a 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.
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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.
Optimum's fire rated sliding steel window features a self-closing mechanism that
automatically closes the window in the event of fire. This sliding steel window
incorporates the same type of fusible link utilized in Optimum's other fire rated
products.