20t Light Weight Durable Hollow Design Single Girder Truss Gantry Crane

Product Description

Product Description

20t Light Weight Durable Hollow Design Single Girder Truss Gantry Crane

Truss gantry cranes are rail-mounted lifting equipment designed for small and medium-sized lifting scenarios. The main beam adopts a triangular grid truss structure welded from angle steel or I-beams. Through mechanical optimization, its self-weight is reduced by over 30% compared with traditional box girders, while wind load resistance is significantly improved. The equipment is suitable for outdoor environments such as open-air warehouses, factory workshops and small ports/docks.

 

Some models are equipped with an extendable cantilever function, supporting single-side or double-side cantilever structures. The spreader can extend 3-5 meters beyond the outriggers without moving the entire machine, accurately covering traditional blind areas such as the tops of trucks and the edges of container stacks.

Note: Specific model parameters can be customized according to actual load, span, and functional requirements. Please contact our sales team for technical solutions.

(1)Technical Parameters

Type	Single Beam Truss Gantry Crane
Tonnage	1T/2T/3T/5T/10T/12.5T/16T/20T/25T/30T/40T/50T/75T/100T/200T/Customized
Span	1 meters to 40 meters
Lifting Height	2 meters to 40 meters
Working Level	A1/A2/A3/A4/A5/A6/A7/A8
Lifting Speed	5/0.8 m/min double speed or Customized
Trolley Running Speed	0-20 m/min frequency conversion or Customized
Cart Running Speed	0-32 m/min frequency conversion or Customized
Warranty Time	18 MONTHS AFTER SHIPMENT
Lifting Motor	Squirrel cage 2-speed motor with Disc electromagnetic brake inside
Gear Motor	Hardened tooth gear for C.T.& L.T.
Surface Preparation Type	Shot Blasting Sa2.5
Painting Type/Depth	E/120µm
Max./Min. Static Wheel Load	62.9/11.8 kN
Control Method	Wireless Remote control or Ground Handle or Cabin
Industrial Voltage	380V 50HZ 3P AC or Customized
Working Temperature	-20~45ºC or Customized
Application Area	Warehouses, Ports, Steel Plants, Power Stations, Bridge Construction Sites, Shipyards,etc.

(2)Advantages & Limitations

Advantages	Light Weight: Triangular grid truss (angle steel/I-beam) uses 30-50% less material than box girders, reducing self-weight.
	Low Cost: Simplified welding/standardized parts cut manufacturing costs by 20-40% vs. box girders.
	Better Wind Resistance: Hollow design improves wind load capacity by 10-15% at same span/height.
	Faster Modular Install: Prefabricated sections with bolted assembly (no heavy lifting equipment needed).
	Easier Maintenance: Open structure allows quick inspection/replacement of wear parts.
Limitations	Precision/high-speed limitations: Flexible truss structure leads to lower spreader positioning accuracy and slower speeds than rigid beam cranes.
	Indoor space constraint: Truss main beam requires more headroom than box girders, limiting use in low-clearance environments.

(3)Product Structure 
Truss girder single beam gantry crane is small and medium-sized lifting equipment that runs on rails. It is mainly composed of mast (main beam, outrigger, lower beam, etc.), hoisting mechanism, operating mechanism and electronic control part, etc.

Truss Gantry Structure

1. Composition
   • Main beam: Constructed from Angle Steel or I-Beams.
   • Legs: Constructed from Angle Steel or I-Beams.
   • End beam: Welded from Q235B or Q355B steel.
2. Functions
   • Supports the entire crane structure.
   • Transmits loads during operation.
   • Connects to the rails for stable movement.
3. Structural Feature
   • The truss structure welded into a triangular grid, features lighter self-weight and high wind resistance.

Lifting Mechanism

1. Composition
   • Primarily includes an electric hoist, which contains a motor, reducer, and steel wire rope/chain.
2. Function
   • Drives the vertical lifting and lowering of materials via the motor.
   • Serves as the core execution component for completing handling operations.

Electrical System

1. Composition
   • Includes motors, reducers, brakes, and control boxes.
2. Function
   • Precisely controls lifting and moving actions to ensure operational safety.
3. Advantages
   • High intelligence level for automated operation.
   • Strong protection performance against electrical faults and environmental factors.
   • Convenient maintenance for reduced downtime and cost.

Cantilevers (Optional)

1. Definition:
   • A cantilever is a single or double-sided overhanging extension of a gantry crane's main beam beyond its outriggers.
2. Functions:
   • Expanding the working range: Enables the spreader to reach beyond outriggers without moving the crane.
   • Balancing structural loads: Optimizes stability via counterweights or mechanics to offset main beam loads.

 

Operating Mechanism

1. Wheels:
   • Directly contact the rails or ground to support the weight of the gantry crane and drive the equipment to move.
2. End Beams:
   • Connect the bottoms of the two side legs, distributing the weight of the legs and main beam (including cargo loads) to the wheels and rails through the end beams.
3. Rails (or Ground Foundation):
   • Provide a running path for the wheels and bear the weight of the gantry crane and cargo loads.

Safety Devices

1. Rubber buffer: Absorbs impact energy to avoid rigid collisions with surrounding objects or personnel.
2. Audio-visual alarm: Emits light and sound warnings during startup or abnormal conditions to alert nearby personnel.
3. Overload protector: Monitors lifting weight and cuts off power when overloaded to prevent structural damage or overturning.
4. Contactor: Controls circuit on/off for crane operation and provides under-voltage/voltage-loss protection.
5. Circuit breaker: Automatically trips to cut off power during overload, short-circuit, or under-voltage faults to prevent electrical accidents.
6. Seamless slide wire: Ensures stable power supply with enclosed design to prevent electric shock and foreign matter interference.
7. Cross limit switch: Restricts lifting height and travel range to prevent overhoisting and derailment.
8. Emergency stop button: Instantly cuts off all power in emergencies to halt operation and minimize risks.

Choosing the right crane is crucial to improving operational efficiency and safety. At Shanghai Hexin, our team can help you select the most suitable crane system based on your specific lifting requirements. Feel free to contact us for expert advice or a detailed quote.

^{Of course, we also offer a customized service.To provide you with the most accurate and tailored design solution, please share the following details:}

1. Lifting Capacity: Specify the maximum weight the crane needs to lift to design a safe and efficient load-bearing system.
2. Span Length (Rail Center to Rail Center): Provide the distance between the centers of the two rails, which affects the overall structural design and stability of the crane.
3. Lifting Height (Hook Center to Ground): Indicate the height the hook needs to reach from the ground to determine the appropriate girder or leg height.
4. Rail Installation: Confirm whether rails are already installed; if not, specify the required rail length for a complete system plan.
5. Power Supply: State the voltage of the power source, influencing the design of electrical components and wiring.
6. Working Conditions: Describe the types of materials to be lifted and ambient temperature to select suitable materials, coatings, and mechanical specifications.
7. Workshop Drawing/Photo: Share drawings or photos of the workshop (if available) to help tailor the crane design to your space and layout.

If you are unsure how to obtain the above information, please feel free to contact our sales manager at any time. We will provide you with professional assistance and guidance.

Company Profile

Founded in 2007, our company's entrepreneurial journey began in the lifting machinery industry. With the expansion of our global operations, we built a modern manufacturing base in China and officially launched the independent brand Hexin Crane in 2024. Headquartered in Shanghai, we are committed to our mission of "Helping to Lift World."

As specialists in overhead cranes and gantry cranes, we focus on delivering tailored solutions for diverse industrial challenges. Whether addressing precision lifting in light-duty workshops or complex heavy-duty scenarios in ports, steel plants, and beyond, our engineering team crafts purpose-driven designs. Today, Hexin Crane serves clients across 20+ countries and regions, including end-users, distributors, and industry partners. Leveraging modular design, high-precision manufacturing, and intelligent control technologies, we supply core components and OEM manufacturing services for global markets, covering load capacities from 1 to 500 tons. Our solutions are seamlessly integrated into our clients' production ecosystems.

From Shanghai to the world, Hexin Crane combines expertise and craftsmanship to deliver greater value with every lift. For more details, visit our website or contact our global service team.

Certifications

Exhibitions

Our quality and reputation attracts many customers
We will select the most suitable transportation method based on the actual situation of your product to ensure it arrives safely and quickly. If you have other transportation requirements, please feel free to contact our sales manager at any time, and she will provide you with the most appropriate transportation solution.

Packaging & Shipping

FAQ

Q1: Are you a manufacturer or a trading company?
We are an integrated production and trading enterprise, with our own independent R&D team, manufacturing facility, and professional marketing department. This integrated structure allows us to offer comprehensive solutions and maintain a competitive edge in the market.

Q2: Are customization options available?
Absolutely. We understand that each customer's needs are unique. That's why we offer full customization on all our products to suit your specific operational requirements. To ensure we provide the best solution, we encourage you to provide detailed information about your needs. Our expert team will then design the most optimal solution, tailored to meet your exact specifications, while minimizing costs and maximizing efficiency.

Q3: How long is your warranty coverage?
We offer a 2-year warranty on the crane itself and an 18-month warranty on electric components. Should any issues arise, our dedicated after-sales team and professional engineers will promptly assist in troubleshooting and resolving the issue. Support is available via email or video conference for efficient diagnosis. If the issue is found to be related to quality, we will swiftly send any necessary replacement parts via air freight to minimize downtime and ensure a quick resolution.

Q4: Do you provide overseas installation services by engineers?
While we typically provide a detailed instruction manual for self-installation, we also offer the option of overseas installation services in specific cases. Our products are carefully packaged and designed for easy installation, which helps reduce costs and streamline the setup process. If necessary, we can arrange for our engineers to assist with installation at your location.

Q5: What other types of products do you offer?
We offer a broad range of lifting solutions, including but not limited to overhead bridge cranes, gantry cranes, jib cranes, monorail cranes, workstation cranes, and various other construction lifting machinery. Our sales specialists are always available to help you choose the most suitable equipment for your specific needs.

Q6: If we have an urgent need, can you arrange prompt delivery?
Yes, we understand the urgency of your requirements. Once your order parameters are confirmed, we prioritize urgent orders and work diligently to expedite the production and shipping process. Our efficient production systems and logistics network ensure that you receive your products quickly and reliably, without compromising on quality.

Q7: I have limited headroom in my workshops.
Is it possible to install a crane in that space? Definitely. We offer specialized crane solutions designed for workshops with low headroom. Our experienced engineers will work with you to create a customized design that fits your space perfectly, ensuring both optimal performance and space efficiency.

Q8: Do you supply lifting and rigging tools?
Yes, we provide a full range of lifting and rigging tools, including hooks, electromagnetic devices, grab buckets, and more. Please consult with our sales team to discuss the specific tools and accessories that best suit your needs.

Q9: Do you accept OEM/ODM business?
Certainly. We have extensive experience in OEM/ODM manufacturing and have collaborated with leading crane brands and customers worldwide. Whether you need customized products or full OEM solutions, we are equipped to meet your specifications.

Q10. What payment methods do you accept?
We accept T/T, bank transfers, L/C, PayPal, and other major payment platforms.