Technical Specifications
BI-FOLD DOOR SPECIFICATIONS
Standard door sizes: 12’ to 80’ clear opening width: heights to 20’ clear.
Main door structure: Double 2” x 4” x 1/8” Class A500 structural center
hinge line tubing on doors to 46’ wide and double 2” x 6” Class A500 on
larger doors.
Door frame: 14-gauge, welded, Class A513 square steel tubing: 1-1/2” x
1-1/2” on doors up to 46’ wide: 2” x 2” on doors over 46’ wide. Door frame
unitized on doors to 46’ x 16’. Doors over 18’ high and over 46’ wide built
in right and left halves. Doors over 18’ high may have the top and bottom
horizontally divided to facilitate freight.
Door trusses: Heavy-gauge steel tubing: 1 to 3 horizontal trusses, 6 1/2” to
12” deep, depending on door width, height and load requirements.
Door nish: All doors primed with black water base oxide and painted with
black ester enamel epoxy.
Hinges: Strong factory welded leaf type hinges are installed on the
horizontal centerline and top of the door. Top hinge can be ordered with
9-1/4” wide leaf up for wood buildings or 3” wide leaf up for steel buildings.
Five top hinges on doors to 34’ wide, seven hinges on doors over 34’ and
nine hinges on doors over 56’ wide and 16’ tall.
Auxiliary arms: Patented, high-clearance door support arms made of
heavy-gauge square-steel tubing with self-concealing chain followers.
Wheels: roller wheels on door bottom and Auxiliary Arms are solid steel
with sealed roller bearings inserts.
Drive unit: 1 h.p. to 2 h.p. totally enclosed fan cooled motor with geared
speed reducer. Electric brake installed on all doors. Jack shaft with dual
chain drives supplied on all doors. Motor mounted to side on doors over
34’ wide.
Electrical wiring: Furnished and completely factory installed. 1 h.p. motors
standard 110 volt with circuit breaker: 1.5 hp. and 2 h.p. wired 220 volt
with up electrical safety disconnect. Conduit required to be supplied by
others. Electrical components placed on door in a location to meet the
requirements of N.E.C. section 513.
Operating control: NEMA type 1 “Up-Down-Stop” three push button
control wired 24 volts standard.
Up/Down limits: Easy, positive micro-switch adjustment for top and
bottom automatic shut-o contained in relay box with chain drive coupling
with drive shaft.
Open/Close time: Approximately one to two minutes, varies with door size.
Operating cables: 7/32” aircraft cables in quantity to provide a 5 to 1
safety factor.
Cable lift drums: Four 2” diameter lift drums with cable guide and cable
guard installed on full width drive shaft. Doors smaller than 36’ supplied
with three lift drums. Doors larger than 56’ wide and 16’ tall supplied with six
lift drums.
Drive shaft: Full width drive shaft constructed of 2” diameter steel torque
tube. Load bearings supporting the drive shaft are installed on each side
of lift drum and are bronze with grease tting.
Single location lock: Patented self adjusting latches secure door to jambs
with the turn of a crank. Eliminates walking to each side of door to lock/
unlock. Micro switch safety disconnect supplied to interrupt power if Single
Location Latch is not unlocked.
Bottom follower system: Hold bottom of door against building with
door closed.
Rubber top seal: Standard 12” wide rubber roong membrane with
ultraviolet inhibitor to weather proof top of door.
Rubber bottom seal: 3” space between door frame and nished oor
sealed with standard 12” wide bottom seal.
Weather-strip package: Supplied in bulk on a per foot basis for sealing
between door frame and building jamb on vertical and horizontal surfaces
and at center hinge area.
Floor cane-bolt: Factory installed at center of door over 40’ wide.
Cane-bolt slides thru sleeve on door into a hole drilled in the oor.
Warranty: 3 years on materials and workmanship.
OPTIONAL FEATURES
Extra-heavy duty trussing: Standard wind load can be increased or special
demands provided.
Jamb reinforcement rail: 10 gauge galvanized steel 5” wide, suitable for
doors to 46’ wide, 3/16” oxide primed plate 5-1/2” wide available for doors
wider than 46’. Wood or concrete jamb buildings require a reinforcing plate
for operation.
Automatic “knee action” jamb latch: Patented drive shaft driven
latch reaches out and pulls door securely closed before motor shuts o.
Automatic cane bolt supplied on doors over 40’ wide. Single location latches
deleted. Safety edge recommended.
Safety edge and photo eye: Avaiable by special order.
Dead-man operating control: NEMA type 1 three button control wired so
as to require constant pressure for door to raise or lower.
Up electrical safety disconnect: Completely removes power if limit control
fails, standard on 1.5 h.p. and 2 h.p. doors. 1 h.p. doors supplied with circuit
overload protection.
Commercial radio control: 3 button control allows door to be opened,
stopped and closed or any combination from remote location. Requires
Automatic Jamb Latch. Photo Eye or Safety Edge recomennded.
Remote antenna for radio control receiver: Increase range of radio
control transmitter. Can be installed outside building.
Automatic cane-bolt: Increases wind-load strength of door frame.
Standard on doors over 40’ wide.
Standard bi-fold doors: Available for use where Hi-Fold Door
high-clearance advantages are not needed.
Walk doors: Standard aluminum frame insulated or heavy-duty steel frame
insulated doors with residential grade keyed locksets.
Windows: Standard single glazed sliders or insulated commercial grade
slider windows. Fixed sash windows available.
Framed openings: Prepared openings for walk doors and windows.
Includes step guard for walk door.
Free standing door frames: Jambs and header supplied when adequate
building structure is not available.
Hydraulic Lift Unit: Powerful hydraulic lift system increases door speed for
reduced cycle times. Door travels 2-3 times faster than standard gearbox
driven doors. Shipped completely assembled, tested and full of oil. Includes
safety brake to lock door in position in the event of sudden hydraulic pressure
loss. Wired 220 volt single phase. Standard on some sizes.
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Quality Engineered from the Ground Up.
Higher Clearance x Higher Quality + More Options = Higher Value
Because of its continuing program of product improvement, Hi-Fold Door Corporation reserves the right
to make changes in specications and designs without notice or obligation.