Double Girder Bridge Crane

The Double Girder Bridge Crane is the premier solution for heavy-duty lifting, precise material handling, and maximizing efficiency in the most demanding industrial environments. Engineered with superior structural integrity, enhanced lifting height, and exceptional durability, it outperforms single girder cranes where capacity, span, duty cycle, and precision are critical. This workhorse is the backbone of foundries, steel mills, power plants, large warehouses, and heavy manufacturing facilities worldwide.

Capacity: 20 Tons to 500+ Tons (Custom designs exceed 1000T)
Span: Up to 40+ Meters (130+ Feet) - Larger spans possible
Lifting Height: Up to 30+ Meters (100+ Feet) - Highly customizable
Duty Class: FEM 1Am, 2m, 3m / CMAA Class C, D, E (Moderate to Severe Service)

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Double Girder Bridge Crane Key Features & Advantages

1. Unparalleled Load Capacity & Span:
- Designed to handle extreme loads (ranging from 20 tons to 500+ tons and beyond) with ease.
- Capable of traversing longer spans efficiently and safely due to its inherently rigid twin-girder design.
- Ideal for large bays, wide manufacturing halls, and outdoor gantry applications.
2. Superior Structural Rigidity & Stability:
- Two parallel main girders provide immense resistance to bending and twisting under heavy loads.
- Significantly reduced deflection compared to single girder cranes, ensuring precise load positioning and enhanced safety.
- Stable platform minimizes load sway, improving operator control and safety.
3. Optimized Hook Height:
- The trolley and hoist run on top of the girders, maximizing the available hook height beneath the crane.
- Crucial for facilities with limited headroom or requiring deep lifting into pits or furnaces.
- Allows for greater vertical utilization of your building space.

Double Girder Bridge Crane

4. Enhanced Durability & Long Service Life:
- Robust construction using high-grade steel (typically ASTM A36 or equivalent) withstands harsh conditions, high temperatures, corrosive environments, and intensive usage (FEM 1Am, 2m, 3m classes).
- Designed for demanding duty cycles and continuous operation.
5. Greater Flexibility & Versatility:
- Ample space between girders allows for easy integration of auxiliary equipment like walkways, service cranes, lighting, cable trays, magnet panels, or specialized lifting attachments (grabs, spreaders, etc.).
- Accommodates multiple trolleys or specialized hoists for complex handling tasks.
6. Precision Control & Maneuverability:
- Available with smooth and precise variable frequency drive (VFD) control for both bridge travel and trolley motion, enabling soft starts/stops and accurate positioning.
- Choice of pendant control (wired) or advanced radio remote control for optimal operator safety and visibility.
7. Advanced Safety Features (Standard & Optional):
- Overload Limit Switches: Prevent lifting beyond rated capacity.
- Emergency Stop Buttons: Instantly halt crane operation.
- Bumpers/End Stops: Absorb impact at runway ends.
- Anti-Collision Systems: For multi-crane installations.
- Crane Travel Limit Switches: Prevent over-travel.
- Fail-Safe Brakes: On hoist, trolley, and bridge drives.
- Walkways & Ladders: For safe inspection and maintenance (often standard).
8. Reliable Drive Systems:
- High-torque motors and heavy-duty crane gearbox designed for industrial environments.
- Precision-machined end trucks with double-flanged wheels ensure smooth, true travel along the runway beams with minimal drift.

Double Girder Bridge Crane

Double Girder Bridge Crane – Technical Parameter Table

Parameter	Typical Range / Standard Options	Customization Capability
Capacity	20 – 500 tons	Up to 1000+ tons
Span	10 – 40 meters (33 – 130 ft)	Up to 50+ meters (165+ ft)
Lifting Height	6 – 30 meters (20 – 100 ft)	Virtually unlimited
Duty Class	FEM 1Am, 2m, 3m CMAA Class C (Moderate), D (Heavy), E (Severe)	FEM 4m/5m CMAA F (Continuous Severe)
Hoisting Speed	0.5 – 15 m/min (1.6 – 50 ft/min)	Adjustable via VFD
Trolley Speed	5 – 40 m/min (16 – 130 ft/min)	Adjustable via VFD
Bridge Speed	10 – 60 m/min (33 – 200 ft/min)	Adjustable via VFD
Control Mode	Pendant Control (8+ buttons) Radio Remote Control (IP65/IP67) Operator Cabin	Integrated Systems, Automation Ready
Power Supply	3-Phase: 380V/50Hz, 415V/50Hz, 480V/60Hz	220V, 440V, 575V, 660V, 50/60Hz
Ambient Temp.	-20°C to +40°C (-4°F to 104°F)	-40°C to +55°C (-40°F to 131°F)
Relative Humidity	≤ 85% (non-condensing)	Up to 100%
Work Duty	Max. 60% ED (Standard) Up to 100% ED (Heavy Duty)	Defined per FEM/CMAA
Girder Type	Welded Box Section (Standard) Lattice Truss	Wide Flange Beam (WF)
Runway Beam	Custom Fabricated Wide Flange Beams (WF) Capped Channels	Integrated Crane Rails
Wheel Type	Double Flanged Steel Wheels	Forged Steel Wheels (Heavy Duty)
Safety Devices	Overload Limiter Emergency Stop Travel Limit Switches Bumpers Anti-Collision (Multi-Crane) Fail-Safe Brakes	Rail Sweeps Anemometer (Wind Speed) Crane Monitoring System
Standards Compliance	ISO 8686 (Design) FEM 1.001 CMAA 70/74 AS 1418.1 EN 13001 OSHA 1910.179 PUWER	Local National Standards (GB/T, etc.)
Surface Treatment	Sandblasting (Sa 2.5) Epoxy Primer Polyurethane Top Coat	Galvanizing (Zinc) Specialized Coatings

Key Notes on Parameters:

1. All Values are Indicative: Exact specifications are engineered to order based on:
- Specific load diagrams & usage patterns.
- Building/runway structure details.
- Environmental conditions (dust, heat, chemicals).
- Required duty class (FEM/CMAA).
- Local safety regulations.
2. VFD Control: Strongly recommended for all motions (Hoist, Trolley, Bridge) for smooth acceleration/deceleration, precise positioning, reduced mechanical stress, and energy savings.
3. Duty Class is Paramount: Selecting the correct FEM or CMAA class ensures the crane is robust enough for its intended number of lifts, load spectrum, and operating hours, directly impacting longevity and safety.
4. Hook Height is Critical: Double girder design maximizes crane hook height. Accurate measurement from the runway rail top to the floor (and any obstructions) is essential.
5. Runway Quality: Crane performance and longevity heavily depend on a perfectly level, straight, and aligned runway system built to appropriate structural standards.
6. Certification: Cranes typically require third-party inspection and load testing (e.g., 125% of SWL) before commissioning and periodically during service life.

Double Girder Bridge Crane Applications

application

1. Steel Mills & Foundries (Slab, coil, ladle handling)
2. Power Generation Plants (Turbine, boiler maintenance)
3. Heavy Machinery Manufacturing
4. Large-Scale Warehousing & Distribution Centers
5. Shipbuilding & Dry Docks
6. Mining & Mineral Processing
7. Aerospace Manufacturing
8. Large Fabrication Shops
9. Pulp & Paper Mills
10. Scrap Yards & Recycling Facilities

Why Choose a Double Girder Bridge Crane?

case

factory

1. Maximum Lifting Capacity & Span: Handle the heaviest loads over the widest areas.
2. Superior Rigidity & Precision: Minimize deflection and sway for accurate placement.
3. Optimal Hook Height: Utilize vertical space efficiently.
4. Unmatched Durability: Built for the toughest environments and continuous use.
5. Enhanced Safety: Engineered with robust safety systems.
6. Future-Proof Flexibility: Adaptable for auxiliary equipment and evolving needs.
7. Long-Term ROI: Reduced downtime, lower maintenance costs, extended service life.

Custom Engineered Solutions

Every Double Girder Bridge Crane is engineered to order based on your specific requirements: capacity, span, lifting height, duty cycle, operating environment, control preferences, and safety regulations. We provide detailed CAD layouts and project management.

Contact us today for a detailed consultation and quote. Let our engineering team design the optimal Double Girder Bridge Crane solution to enhance your productivity, safety, and bottom line.