NABCO ENTRANCES, INC., S82 W18717 Gemini Drive, Muskego WI 53150, (877) 622-2694, (888) 679-3319 fax Rev 10/13
A. Gyro Tech equipment as manufactured by NABCO ENTRANCES, INC. has been specified and shall be quoted as the
base bid. Proposals for substitution products may be submitted by the bidding contractors a minimum of 10 days prior to
bid due date. The proposed substitution shall meet the quality and performance standards described in this specification.
1.06 JOB SITE CONDITIONS
A. Site Survey: Verify site conditions including, but not limited to the following: opening sizes, floor conditions, plumb and
level mounting surfaces (substrates shall be of proper dimension and material).
B. Coordinate installation with glass, glazing, hardware and electrical to avoid construction delays.
1.07 WARRANTY
A. Warranted materials shall be free of defects in material and workmanship for a period of one year from date of substantial
completion. During the warranty period the Owner shall request NABCO factory-trained technicians to perform service.
Warranty repairs are provided during normal business hours. Owner to receive warranty after completion of installation.
1.08 COMPLIANCE
A. A completed American Association of Automatic Door Manufacturers (AAADM) compliance form shall be submitted as
proof of compliance with ANSI A156.10 Standard for power operated pedestrian doors. Door(s) shall be inspected and a
form shall be signed by an AAADM certified inspector prior to placing door(s) in operation.
Part 2 - PRODUCTS
2.01 APPROVED MANUFACTURER
A. Automatic equipment and controls shall be manufactured by:
NABCO ENTRANCES INC.
S82 W18717 Gemini Drive
Muskego, WI 53150
Phone: (877) 622-2694
Fax: (888) 679-3319
2.02 AUTOMATIC OVERHEAD CONCEALED (OHC) SWING DOOR SYSTEM
A. Model GT300
Bottom Load
or GT8300
Side Load
Swing Door System as indicated on door schedule and details.
B. Mode of operation: Spring Close. Gyro Tech swing operator shall open door by energizing motor and shall stop door by
electrically reducing voltage and stalling motor against mechanical stop. Door shall close by means of spring energy, and
closing force shall be controlled by gear system and with motor being used as a dynamic brake without power. System
shall operate as a manual door control in event of power failure. Manual operation shall require less than 30 lbs. force
applied to door lockstile. Opening and closing speeds shall be adjustable. Hold open time shall be adjustable from 1-60
seconds. Door operation shall not require any fluids or gases under pressure to be used in opening and closing of door.
C. Components:
1. Operator Housing
2. Gyro Tech GT300 & GT8300 Swing Door Operator
3. Microprocessor Control
4. Connecting Hardware
5. Breakaway Door Stop – If required
1a) Operator Housing for the GT300 Bottom Load shall be, 5 1/2" (140mm) deep by 5" (127mm) high aluminum
extrusion with finished end caps and shall be prepared for mounting to new or existing door frames. All structural sections
shall have a minimum thickness of .146” (4mm) and shall be fabricated of 6063-T5 aluminum alloys. Housing cover shall
be removable to provide service access and shall be extruded from 6063-T5 aluminum alloys to a minimum thickness of
.093” (2mm). Plastic covers shall not be acceptable.
1b) Operator Housing for the GT8300 Side Load shall be, 5 1/2" (140mm) deep by 6" (152mm) high aluminum extrusion
with finished end caps and shall be prepared for mounting to new or existing door frames. All structural sections shall
have a minimum thickness of .166” (4mm) and shall be fabricated of 6063-T5 aluminum alloys. Hinged housing cover
shall be able to be raised and secured or removed to provide service access and shall be extruded from 6063-T5 aluminum
alloys to a minimum thickness of .100” (3mm). Plastic covers shall not be acceptable.
1c) Finish: Aluminum shall have a standard finish of AA-M12-C22-A31 (204R1, clear) or AA-M12-C22-A44 (dark
bronze). Black and special finishes available upon request.
2) Power Operator: Completely assembled and sealed unit which shall include helical gear-driven transmission,
mechanical spring and bearings all located in cast aluminum housing and filled with special lubricant for extreme