MHhs Box Girder Gantry Crane for Heavy-Duty Lifting
Product Introduction
The MHhs Type Fully Enclosed Gantry Crane (also known as fully enclosed gantry crane or box-type gantry crane) is a gantry crane where both the main girder and box-section legs feature box-section welded construction — box girder plus box-section legs, hence the name "fully enclosed box" or "box-type" structure. This design offers excellent overall rigidity and a clean, aesthetically pleasing appearance, making it the most robust of the three configurations. Compared to the lattice structure (good wind resistance) and the lattice-top/box-leg hybrid (economical), the fully enclosed box structure provides the highest rigidity and load-bearing capacity, making it ideal for heavy-duty and high-frequency applications.
The MHhs Type Fully Enclosed Gantry Crane has a lifting capacity of 1 to 20 tons and a span of 10 to 35 meters. It is suitable for outdoor and indoor applications including subway construction, stations and ports, logistics and transportation, warehouses and freight yards, construction sites, cement product plants, machinery assembly plants, and hydropower stations. The working environment temperature ranges from -20℃ to +40℃.
Product Specifications
- Product Name: MHhs Type Fully Enclosed Gantry Crane (fully enclosed gantry crane / box-type gantry crane)
- Model & Specification: MHhs Type / MH Type, lifting capacity 1~20 tons (Custom Non-Standard Manufacturing available)
- Place of Origin: Xinxiang, Henan (Kelude Heavy Industry)
- Custom Non-Standard Manufacturing: Span, Lifting Height, and Cantilever Length can all be customized
- Structural Form: Fully enclosed box structure (box girder + box-section legs)
- Applicable Span: 10~35 meters (customizable)
Product Images
The image above shows an actual MHhs Type Fully Enclosed Gantry Crane. The fully enclosed box structure with box-section main girder and box-section legs provides excellent rigidity and a clean appearance.
Product Features
- Superior Rigidity with Fully Enclosed Box Design: Box-section main girder and outriggers deliver the highest overall stiffness among the three structural types (full lattice / lattice-top with box-leg / fully enclosed box), making it ideal for heavy-duty and high-frequency operations.
- Clean and Aesthetic Appearance: All-steel plate box-section welded construction with a smooth surface and minimal weld seams. Surface anti-corrosion coating is available, offering the best appearance among the three structures.
- High Load-Bearing Capacity: The box section provides excellent bending and torsional resistance, ensuring the highest safety margin at the same tonnage.
- Wide Range of Applications: From subway construction to machinery assembly, from indoor workshops to outdoor freight yards, the fully enclosed box structure offers the greatest adaptability.
- Multiple Control Methods: Ground control, cabin control, and Wireless remote control are available.
- Semi-Custom Design: Rail dimensions and parameters are determined based on site conditions and requirements, with technical personnel providing full support throughout the process.
Working Principle
The travel mechanism of the MHhs Type Fully Enclosed Gantry Crane moves longitudinally along the ground crane rail, while the Electric Hoist moves transversely along the lower flange of the I-Beam on the main girder. The Conical Rotor Motor of the CD1 Type Electric Hoist drives the drive drum to wind the Wire Rope, enabling the hook to lift and lower. On power failure, the cone brake automatically applies.
Product Structure
The MHhs Type Fully Enclosed Gantry Crane consists of the following core components:
Box girder: Q355B steel plate welded into a box section, formed by submerged arc automatic welding. The camber of the main girder is controlled in accordance with GB/T 3811 Crane Design Standard.
Box-Section Outriggers: Q235B (≈S235JR) or Q355B (≈S355JR) steel plates welded into a box section, with the bottom welded to a ground beam fixed to the concrete foundation. The overall rigidity is excellent.
Bridge Travel Mechanism: Motor + Gearbox / Reducer + Wheel Block, with adjustable speed. Individually driven to suit crane rail operation.
Electric Hoist: CD1/MD1 Type Wire rope hoist, comprising a Conical Rotor Motor, three-stage Reducer / Gearbox, drum, Wire Rope, and Hook block.
Electrical Control System: Main Circuit Breaker, Contactor, Thermal Overload Relay, Limit Switch. Control voltage is AC 36V safety voltage.
Technical Parameters
General Technical Parameters for MHhs Type Fully Enclosed Gantry Crane
| Parameter Item | MHhsBox-Type Parameter |
| Lifting Capacity | 1~20 t(1/2/3/5/10/16/20t,Customizable (Non-Standard)) |
| Span | 10~35 m(10/15/19/20/21.5/23/28/35m) |
| Lifting Height | 6~30 m(6/9/12/18/24/30m) |
| Work Duty / Classification | A3~A5 |
| Lifting Speed | 8 m/min(Standard)/ 8+0.8 m/min(Two-Speed) |
| Trolley Travel Speed | 20 m/min |
| Crane Travel Speed | 20~45 m/min |
| Power Supply | 3AC 380V 50Hz |
| Operation Mode | Floor / Operator / Remote Control |
| Structural Configuration | Full Box(box girder+Box Legs) |
| Structural Features Excellent rigidity and aesthetic appearance; the highest stiffness among the three structural types |
Product Drawings
The above is a reference structural drawing of the MH Type box-leg gantry crane. Actual dimensions are determined by lifting capacity, span, and lifting height.
Applications
- Metro Construction: Handling of tunnel segments and shield equipment. The fully box-section structure delivers excellent rigidity and reliable load-bearing performance.
- Railway Stations & Ports: Cargo loading and unloading. Box-section legs offer better impact resistance than lattice legs.
- Warehouses & Freight Yards: Stacking and handling of unit loads, with a clean, neat appearance.
- Cement Plants / Hydropower Stations: Heavy material handling. The box-section structure provides the highest safety margin.
Selection Guide
Light Duty: 1–5t, span 10–20m, suitable for workshops and warehouses. Reference price: RMB 30,000–80,000.
Medium Duty: 5–10t, span 20–28m, suitable for metro construction and logistics yards. Reference price: RMB 80,000–180,000.
Heavy Duty: 10–20t, span 28–35m, suitable for hydropower stations and large freight yards. Foundation load capacity must be verified. Reference price: RMB 180,000–350,000.
Operating Instructions
Inspection: Verify the crane rail is clear of obstructions, the wire rope is in good condition, and the brake operates properly.
Operation: Perform a trial lift of 200mm to confirm braking. Overloading is strictly prohibited. Operations must stop in strong winds (above Beaufort scale 6).
Shutdown: Raise the hook to the upper limit, then cut off the main power supply. When parked outdoors, engage the rail clamps.
Why Choose Kelude Heavy Industry
Professional Fully Box-Section Manufacturing: Box girders and box-section legs are fully welded from steel plate, with UT non-destructive testing and a three-stage factory test before delivery.
Three Structural Options: Full lattice / box girder with lattice legs / fully box-section — recommended based on your working conditions, with no bundled solutions.
End-to-End Service: Free site survey, design & manufacturing, installation, training, and after-sales support.
Service & Support
Call 13903802779 — 24-hour response.
Need a selection proposal or quotation for the MH Type box-leg gantry crane?
Feel free to contact the Kelude Heavy Industry sales & technical team anytime.
FAQ
Q: How do I choose between the fully box-section, box girder with lattice legs, and full lattice structures?
A: Fully box-section (box girder + box legs) — maximum rigidity, best appearance, highest cost; ideal for heavy-duty, high-frequency indoor applications. Box girder with lattice legs — the best value option, balancing rigidity and economy. Full lattice (lattice girder + lattice legs) — lightest dead weight, best wind resistance, lowest cost; suitable for large-span outdoor applications.
Q: Which national standards do the box-leg gantry cranes comply with?
A: Designed to JB/T 5663-2008 Electric Hoist Gantry Crane; box-section structure references GB/T 14406-2011; hoisting mechanism complies with JB/T 9008.1; installation and inspection per TSG Q7014.
Q: What are the advantages of choosing Kelude Heavy Industry for box-leg gantry cranes?
A: Kelude Heavy Industry is located in Changyuan, Xinxiang, Henangyuan, Xinxiang, Henan, with over a decade of experience in gantry crane manufacturing. Box girders and box-section legs are fully welded from steel plate, with UT non-destructive testing and a three-stage factory test before delivery. We provide free site surveys, structural design, and nationwide on-site installation services.
