Door Engineering’s FF30 door system is built with all the benefits of our Elite standard Four-Fold door. The heavy-duty design and construction of our Four-Fold door enables it to function under high cycle and other severe conditions, which create chronic service and maintenance problems for the conventional door alternatives.
- 7 second operation provides improved critical response time
- Zinc coated sheeting for superior corrosion resistance
- Monitored Safety Edges and Torque sensing for UL 325 Compliance
- Factory installed 1" insulated low-e glass for superior energy efficiency
- Select up to four (4) rows of glass
- Reduced installation time
- Manual operation in a power outage event
Four-Fold doors clear the opening at an average speed of 24 inches per second. Conventional overhead and coiling doors operate between 8 to 12 inches per second.
- 12’ x 14’ and 14’ x 14’ Four-Fold Door = Less than 7 seconds to open
- 14’ x 14’ Overhead Door = 14 to 21 seconds to open
The high-speed operation of the Four-Fold door minimizes heating and cooling losses and reduces waiting time, increasing productivity and energy efficiency. The leading edge of each panel is always visible eliminating the risk of boom to door interference and costly repairs. With Door Engineering’s FF30 door systems you will always reach your destination on time when every second counts!
The Four-Fold door moves horizontally rather than vertically, this allows an apparatus to move quickly and safely. As a result, the door is visible throughout the opening and closing motion allowing the driver to know the precise second the doorway is clear to exit. It is common with overhead sectional and coiling steel doors for delivery vehicles, pick-up trucks or even passenger cars to begin driving through the door opening after losing sight of the bottom of the door, only to hit the bottom panel as they move through the opening. A collision of this type will make it impossible to operate the door (especially with telescoping and coiling steel doors, which cannot tolerate any denting or deforming of the slats). In contrast, the Four-Fold door can operate with similar abuse.
Window Layout Options
- Layout A - 4 Windows per Panel
- Layout B - 3 Windows per Panel
- Layout C - 2 Windows per Panel (Centered)
- Layout D - 2 Windows per Panel (High)
- Layout E - 1 Window per Panel
- Layout F - No Windows
Manual operation is available with the Four-Fold door system. With the simple pull of a cord, manual operation is quick and easy. It requires no springs under tension, time consuming chain hoists, or heavy lifting.
Standard features include:
- Fail-safe bump edges that sense obstructions that the photo eye and interior presence sensors may miss.
- Exterior light curtain photo eyes that provide continuous protection from the floor to 72” in height to sense both objects and personnel in that area.
- Torque sensing safety which is compliant with UL 325 safety standards
- UL compliant spacing between all panels and conventional pinch points
Optional features include:
- LZR-Widescan presence sensor that provides sensing of pedestrians with 3 independent sensing fields for opening and closing
- Audio/Visual warning beacon that provides a horn, strobe, and verbal annunciator to provide warning prior to automatic closing and during the opening and closing motion.
Standard preventative maintenance (PM) on Four-Fold doors includes applying grease to hinges and operators. With general yearly PM, Four-Fold door operators and components are designed to perform over 1 million cycles. Conventional sectional and coiling doors require constant spring and cable maintenance and replacement to keep them in safe working condition. Failure to keep up with costly PM on sectional and coiling steel doors can result in door failure, which can cause both damage to equipment and injury to personnel.