Under-running double-girder cranes are a cornerstone of modern material-handling systems, especially in facilities with limited overhead space and precision lifting requirements. Engineered to travel along the bottom flange of runway beams, this design makes them ideal for environments that demand both space efficiency and high-performance lifting.

What Are Under Running Double Girder Cranes?

Unlike top-running cranes, under-running cranes are suspended from a facility’s ceiling structure. The double girder configuration means two parallel beams support the hoist and trolley, enabling greater load capacity and a higher hook height. This setup is particularly beneficial in industrial settings where floor space must remain unobstructed.

Featured Model: DB22U20-13 from Detroit Hoist

Designed for optimal performance, the DB22U20-13 is ideal for demanding industrial environments. Here’s what makes it exceptional:

Feature	Specification
Capacity	11.00 tons
Hoist Lift Speed	13.00 feet per minute
Trolley Speed	80.00 feet per minute
Reeving System	4-part, 20’2” lift height
Hoist Motor	7.5 kW
Hoist Control	Closed-loop vector VFD
Trolley Motors	Four 0.3 kW motors
Trolley Control	Sensorless vector VFD
Power Supply	230VAC-3PH-60HZ
Trolley Gauge	84 inches
Weight	Approx. 2800 lbs
Service Class	CMAA Class D

This model is built to deliver exceptional reliability, precise control, and robust performance, making it a top choice for industries such as automotive, steel fabrication, aerospace, and heavy machinery.

Key Applications

Under-running double girder cranes are widely used in:

• Assembly Lines: For moving components between stations with high accuracy.
• Clean Rooms: Where contamination control and space efficiency are critical.
• Maintenance Facilities: Lifting engines, gearboxes, and other heavy parts.
• Textile and Paper Industries: Handling large rolls and reels with twin-hook configurations.
• Warehouses: Streamlining the movement of bulky goods without floor obstructions.

Benefits of Under Running Double Girder Cranes

• Custom Integration: Easily adapted to existing power systems and facility layouts.
• Durability: Built to withstand rigorous industrial conditions.
• Enhanced Safety: VFD controls and sensorless vector systems reduce operational risks.
• High Precision: Ideal for delicate or complex lifting tasks.
• Space Optimization: No need for floor-mounted supports.

Whether you’re upgrading your current lifting system or designing a new facility, the Detroit Hoist DB22U20-13 offers a robust, efficient, and safe solution for your material handling needs.

For more details about this, or any other crane in our inventory, contact Protek Crane Solutions today.