 Insulator
door curtains formed from interlocking 22 gauge
galvanized steel insulated roll formed laminated sections.
These sections are composed of two prime painted steel
slats simultaneously formed with poured in place urethane
foam insulation, to produce a laminated section, free
of voids. A continuous rubber gasket seal is incorporated
in each section during the roll forming process. This
gasket creates a continuous seal between each slat which
is derived through the vertical pressure created by
the door curtain. Each section of the curtain shall
have continuous endlocks. The curtain design shall be
such to provide a 20 pound per square foot galvanized
or prime painted steel. Additional weather-stripping
such as astragal, guide weather-stripping and a header
or hood baffle are included as standard.
Vision panels composed of double glazed lites contained
in fully insulated slat sections, and motor
operation are available as options. All other components
of insulated doors shall be the City-Gates standard
design.
COUNTERBALANCED ASSEMBLY
- Steel pipe barrel of size capable of carrying curtain
load with maximum deflection of 0.03" per ft. of
door width. Heat treated helical torsion springs encased
in a steel pipe and designed to include an overload
factor of 25% to ensure minimum effort to operate. Sealed
and prelubricated ball bearings at rotating support
points. A charge wheel for applying initial spring torque
and for future adjustment. Also available in stainless
steel or hot dipped galvanized.
OPTIONAL - High Cycle
Springs designed to satisfy 30, 40, 50, 60, 70, 80,
and 90m life cycles. Extra high cycle, 100m and up consult
Engineering.
BRACKETS - Steel plate
not less than 3/16" thick. Ball bearing at rotating
support points. Bolted to guide wall angle extension,
supports counterbalance assembly and forms end enclosures
HOOD HEXAGON - (Square
or Round Optional) #24 gauge galvanized steel. Formed
to fit contour of brackets. Intermediate supports as
required to prevent excessive sag. Also available in
stainless steel.
GUIDES - Guides are
designed using structural steel angles with a minimum
thickness of 3/16", expansion slotted connections,
and removable bellmount curtain stops to allow for curtain
maintenance without removal of guides. Bellmount stops
shall be flush with guide groove.
OPERATION - Push-up,
hand chain, hand-crank, or motor
operation. (for optional features see motor
operators section in this catalog)
LOCKING - Equip doors
for latching by slide bolts. Motor
doors with locks will void the Guarantee.
FINISHES - (Optional)
Finish on steel to be shop coated primer, except on
galvanized surfaces (on stainless steel, #2B, #4B, #7B
polished or mill finish). Call for color options and
finishes.
COMPLIANCE - The curtain
jamb guides will meet ASTM A-36 and ASTM A-123 specifications
The curtain will comply with ASTM E 84 specifications.
The hood will comply with ASTM A-653.
The electric door operators will comply with NFPA 70.
*Conforms to and with all applicable ASTM Testing Methods.
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The
City-Gates "INSULATOR DOOR" is
the most efficient insulated door available in today's
market. Many STANDARD features of the "INSULATOR",
such as a continuous gasket seal between each slat, 22
gauge interior and exterior slats, prime paint, and a
choice of either a header or internal hood baffle, are
not available even at a premium cost from other manufacturers.
