Double Girder Overhead Crane Introduction
A Double Girder Overhead Crane is a heavy-duty lifting system featuring two parallel girders. Its structure includes a bridge frame (dual girders and end trucks), a crane travel mechanism, a trolley with a hoist, and an electrical control system. The box-type girders support capacities from 5 to 1000 tons, with duty classes ranging from A3 (light usage) to A6/A7 (heavy, frequent operation). The trolley runs on rails mounted atop the girders, accommodating hooks, magnets, or grabs. Operation modes include cabin control, remote radio control, or pendant station
The core structure and operating principles of the Double Girder Overhead Crane
Key components include metal structures, hoisting mechanisms, travel mechanisms, and electrical systems:
- Metal Structuresl: Main beams (typically box or truss beams, rectangular/I-shaped) bear full loads. End beams connect main beams, with bridge wheels enabling longitudinal movement.
- Hoisting Mechanisms: Consist of motors, reducers, drums, wire ropes, and hooks. Motor-driven drum rotation lifts/lowers loads via rope reeling. Double-girder models often have primary/secondary mechanisms (e.g., 50/10 tons) for varied loads.
- Travel Mechanisms: Bridge travel systems (motors, reducers, wheels) drive longitudinal movement along rails; trolley systems (mounted on main beams) enable transverse traversal.
- Electrical Systems: Include control cabinets, consoles, converters, regulating operation and safety. High-end models may feature PLC intelligent control.
Parameters of Double Beam Bridge Crane
The transmission processes of the lifting, trolley travel, and bridge travel systems are as follows: For the lifting system, power from the motor is transmitted to the high-speed shaft of the reducer via a gear coupling, compensation shaft, and brake wheel coupling. After the reducer reduces the motor’s high speed to the required speed, the low-speed shaft drives the drum set through the internal gear ring on the drum; the hook then lifts or lowers loads via wire ropes and pulleys.
Types of Double Girder Overhead Crane
General-Purpose Double Girder Overhead Cranes
- Used in industrial workshops/warehouses for diverse material handling.
- Features: simple structure, strong adaptability, high cost-effectiveness.
- Applied in machinery manufacturing, assembly, and warehousing.
Grab Bucket Double Girder Cranes
- Equipped with grabs for bulk materials (sand, coal, ore).
- High loading/unloading efficiency. Applied in ports, mines, bulk storage yards.
Electric Double Girder Overhead Cranes
- Equipped with electric hoists/trolleys for automated operation.
- Advantages: easy to operate, high efficiency, ideal for frequent use. Used in factories, warehouses, docks for high-throughput handling.
Magnetic Double Girder Cranes
- Fitted with electromagnetic/permanent magnets for magnetic materials.
- Fast, efficient for steel/iron handling.
- Used in steel mills, metal processing facilities.
- With explosion-proof electrical components/structures for flammable environments.
- Safe, compliant with explosion standards. Applied in chemical plants, oil depots, coal mines.
Underslung Double Girder Cranes
- Main girders suspended from roofs, no ground tracks.
- Saves floor space, suitable for high-ceiling/limited-ground facilities.
- Used in light material handling and production lines.
Similar Project Cases
Double girder overhead crane
20 T/Chile/Power Generation Industry
Grab Bucket Overhead Cranes
32 T/Kuwait/Garbage Disposal Industry
Metallurgical Overhead Crane
320 T/El Salvador/Metallurgical Industry
Electromagnetic Overhead Crane
20T+20T/Ecuador/General Manufacturing
Frequently Asked Questions
About the product: Minimum lifting weight? Maximum span? Degree of customization? Delivery time? Warranty period?
Minimum lifting weight: 1T
Maximum span: 28.5m
Customization level: Power supply/speed/color/special structure
Delivery time: 20 working days
Warranty period: 18 month since delivery or 12 month since installation
About purchase: payment method? shipping method and cost? installation responsibility?
Payment method: T/T L/C
Transportation method and cost: Sea/ Land Transportation
Installation responsibility: Provide free remote installation guidance and paid on-site installation guidance.
Regarding certification: What international standards are met? Can you provide country-specific certification?
Which international standards are met: CE ISO
Can certification for specific countries be provided: Based on the required products and supplying countries provided
For detailed cost information, please refer to our “Prices” page
About service: How to get technical support? When will spare parts be available?
You can reach our dedicated technical support team through multiple channels:
Phone/Email/Online Form
Please have your crane model number, serial number (if available), and a clear description of the issue ready to help us assist you faster.
Spare Parts Supply Time
Commonly used parts are typically kept in stock, allowing for fast dispatch (often within 1-3 working days) after order confirmation.
For specialized or less common parts, there may be a manufacturing or procurement lead time. We will provide you with an estimated delivery timeframe as soon as possible after receiving your inquiry or order.
Our goal is to minimize your downtime and ensure your crane operates smoothly.
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15 Years of Crane Industry Expertise: HSCRANE has optimized processes across production, transportation, and installation, leading to substantial cost savings.
