• Trusses- Interior trusses manufactured of structural steel tubing to provide rigidity and wind loading   without the use of a cane bolt.

• Hinges- High strength cold formed hinges shop welded to frame. 5/8" or 3/4" cold rolled hinge pins- lubricated on install.

• Bottom Rollers- Minimum 3" diameter solid steel roller bearing with extra heavy outer casting.

• Jamb Rail- 3x4x1/4" angle iron supplied for bottom roller guide on post-frame buildings.

• Latches- Standard heavy gauge steel manual cam type latch at each side of door.

• Bottom Seal- 2-Ply cloth inserted rubber that is doubled and sandwiched between the door frame and sheeting to provide a 3" weather tight seal.

• Operator- Mounted above the door or on the bottom of the door frame, all lift cable, roller chain, gearbox and other materials subject to door weight are designed with a 5:1 safety factor.

• Motor- Totally enclosed fan cooled continuous duty 1 HP (115V or 230V) Motor minimum, motor sized to the weight of the door.

• Control Box- 24V Transformer, limit switches, contractors and control wiring are contained in a single enclosed unit.

• Wiring- All control wiring is low voltage (24VAC) to ensure safety. This includes, but is not limited to the 3-Push Button Control Station, Limit Switches and Latch Disconnect Switches.

• Operational Control- NEMA 1 (Open, Close, Stop) 3-Push Button control station to allow door to be started, stopped and reversed at any point.

• Top/Bottom Limit Switches- Easy switch adjustment contained in control box for automatic shut-off of power when door is fully opened and closed.

• Cables- Minimum 3/16" or 1/4" aircraft cable. Quantity of cables is determined by the size of the door and is designed for a 5:1 safety factor.

• Cable Sheaves-(top operator) Solid Steel with shielded, sealed ball bearings and a 5/8" diameter pin.

• Cable Drums-(bottom operator) Minimum 3" or 4" diameter heavy walled steel tubing with cable guards.

• Cable Drums-(bottom operator) Minimum 3" or 4" diameter heavy walled steel tubing with cable guards.

• Drive Shaft-(bottom operator) 1-1/4" cold rolled steel shaft running the full width of the door.

• Bearings- 1-1/4" 4-Bolt greaseable flange bearing with forged steel case.

Optional Features

• Auto-Latch- Drive shaft driven latch automatically latches and un-latches door when the door is closed or opened.

• Latch Disconnect Switch- Mounted to manual latch, it does not allow door to be opened unless the latches are disengaged.

• Remote Control- 3-Button transmitter allows door to be opened, stopped or closed from the outside of the building. Requires the door to have auto-latch.

• Dead Man Control- 3-Push Button control that requires constant pressure from operator to operate the door.

• Walk-Thru Service Doors- Heavy duty aluminum framed insulated door or heavy duty roll formed steel doors.

• Windows- 3'0"x3'0" fixed or rolling insulated windows

• Sheeting and Trim- 29 or 26 gauge commercial ribbed sheeting and trim available in an assortment of colors.

• Insulation- Vinyl backed fiberglass insulation or styrofoam board insulation available.

• Support Frame- Side columns and support frame header supplied when building is not designed to withstand the forces of a bi-fold.