20 Ton Gantry Crane for Sale

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20 Ton L Type Single Girder Gantry Crane

The L Type Single Girder Gantry Crane features an “L”-shaped leg on each end. This leg design offers a low weight and wide clearance under the main girder. It is well-suited for handling long materials (like pipes or beams) outdoors, since the L-shaped outriggers maximize side clearance. Yuantai's L-type cranes can be built for capacities up to 20 tons.

20 Ton Truss Gantry Crane for Outdoor Lifting

Truss Gantry Cranes use a truss frame girder rather than a solid box beam. The triangular truss structure reduces weight and wind resistance while maintaining strength. Truss cranes are made for large spans and outdoors, where wind loads are a concern. They can be single or double girder, and range from 5 to over 100 ton. A 20 ton truss gantry crane is ideal for construction sites, yards, or bridge work where durability in weather is needed.

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20 Ton Double Girder Gantry Crane

A Double Girder Gantry Crane has two main beams and can carry heavier loads or longer spans. Yuantai's double girder gantry cranes handle 5–500 tons, so a 20 ton version is well within normal range. These cranes are very stable and suited for heavy-duty use outdoors or indoors where overhead cranes are not feasible. They often include large end-carriage wheels and strong girders to move 20 ton loads smoothly.

20 Ton U-Type Double Girder Gantry Crane

The U-Type Double Girder Gantry Crane is a special double-girder crane with vertical U-shaped legs. This design increases clearance between the legs, making it easier to move large or awkward loads beneath the bridge. Like other double-girder cranes, it excels at high-capacity lifting. A 20 ton U-type crane provides extra workspace under the crane while still delivering strong, stable lifting. This model is common in outdoor yards and hydropower stations where floor clearance is key.

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Each 20 ton crane is built to order. You can choose single or double girder, leg style (A-frame, U, or L), span length, and hoist type. All models comply with international standards (CE, ISO). Yuantai's cranes use quality materials (steel Q235/Q345) and proven hoist mechanisms.

Features of 20 Ton Gantry Cranes

All 20 ton gantry cranes share key features:

• High Lifting Capacity: Engineered steel girders and heavy-duty hoists give a safe 20 ton working load. Double girder designs offer extra strength and stability for high-duty use.

• Versatile Operation: These cranes can travel on rails indoors or outdoors. Many models allow either pendant, radio remote, or cabin controls. They adapt to various sites — factories, ports, yards, or construction fields. For example, an outdoor truss crane resists wind, while a semi gantry saves roof support.

• Custom Spans and Heights: The crane bridge span (distance between legs) can be as small as 8–10 m up to 40 m or more, per project. Lifting height (hook drop) is designed to meet ceiling or yard height. Available in standard voltages (220–440V 50/60Hz 3Phase).

• Robust Construction: All components use quality steel and welding. Legs (A-frame, L-shape, or U-shape) are welded steel box sections. Girders are welded I-beam or box frames. Wheels and rails are heavy gauge. This yields a stable, long-lasting frame built for heavy service.

• Smooth Hoisting and Travel: Cranes use proven electric hoists (CD1, MD1 series) for vertical lift and geared motors for travel. Speed controls are often available. Double-girder cranes typically have the hoist on top of the girders for greater hook height. Gantry cranes offer smooth, precise positioning of loads.

• Safety Features: Standard safety systems include overload protection, emergency stop buttons, and mechanical limit switches. For example, upper and lower hook limit switches stop travel beyond safe range. Brake motors and buffers reduce swing and impact. Truss cranes reduce wind sway. All Yuantai cranes meet safety norms (CE, TUV, etc.).

These features make 20 ton gantry cranes reliable for heavy-duty handling. They operate independently of overhead runways (no need for building rigging) and can be placed on ground rails or skid-chains.

Parts and Components

A typical 20 ton gantry crane has these main parts:

• Bridge (Main Girder): The primary horizontal beam(s) spanning between legs. Can be single or double girders. In double-girder cranes, two parallel beams provide the runway for the hoist. Girders are made of welded steel beams (box or I-beams) for high strength.

• Support Legs and End Beams: Steel legs (also called end carriages) support the bridge. They form the gantry frame. Legs may be A-frame, vertical (U-type), or L-shape. They are mounted on bottom end beams or saddles that hold the travel wheels. The legs transfer the crane's load to the rails. Y-shaped or U-shaped legs offer more clearance between them.

• Crane Trolley and Hoist (Lifting Mechanism): The hoist unit (motor, gearbox, drum, hook) travels along rails on top of the bridge girders. This is the lifting component that raises/lowers the load. It includes the hoist motor, drum/winch, gearbox, brake, and hook block. The hoist is often an electric wire-rope type (CD1/MD1), sized for 20 ton lifts.

• Crane Traveling System: Motors, gearboxes, and wheels that move the crane along rails. On each end carriage are motors connected to steel wheels running on floor rails. These drive the crane longitudinally along the work area. Motorized wheels and drives ensure smooth back-and-forth movement.

• Controls and Electrical System: The crane uses a controller panel with contactors or variable frequency drives. It includes control cables (cable reel or festoon) and a pendant or radio remote control for the operator. Options include cabin control (enclosed operator cabin) for high-use cranes. Electrical components are rated for industrial duty.

• Safety Devices: Limit switches (for hook travel), overload relays (to prevent lifting beyond capacity), emergency stop switch, horn, and travel limit switches are mounted on the trolley and carriage. A brake on each motor holds position when power is off.

Each gantry crane model is a complete assembly of these parts. For example, a U-type double girder crane consists of two parallel main beams, robust U-shaped legs welded to end carriages, a trolley hoist unit, and drive motors on the ends. A single girder crane replaces the two beams with one main beam and travels on steel rails.

Precautions for Use

Operating a 20 ton gantry crane safely requires attention to several points:

• Stay Within Capacity: Do not lift more than the rated 20 ton load. Use built-in overload protection and heed warning indicators. Always verify the load weight before lifting. Never shock-load or swing loads abruptly.

• Environment and Load Type: These cranes are not for use with molten metals, flammable or explosive materials. Avoid use in corrosive or extreme-heat conditions, as specified by the manufacturer.

• Pre-Operation Checks: Before each use, inspect the crane and environment. Check that rails are free of obstacles, wheels are clean, and end stops are in place. Verify that limit switches and brakes work. Inspect ropes, hooks, and chains for wear or damage.

• Operating Area: Keep the work area clear of personnel and obstructions while moving or lifting a load. Do not allow anyone to stand under a suspended load. Use warning signals if needed.

• Proper Training: Only qualified operators should use the crane. Operators must be trained in crane controls and safety.

• Regular Inspections: Perform routine inspections (daily/weekly) as recommended. Address any unusual noise, vibration, or malfunction immediately.

Following these precautions will help prevent accidents and equipment damage. Always follow the crane's instruction manual and meet local safety regulations. Yuantai's cranes come with documentation specifying safe operation procedures.

How to Select the Right 20t Gantry Crane

Choosing the correct 20 ton gantry crane involves matching the crane to your application:

1. Load Capacity and Duty: Ensure the crane's capacity (20 ton) fits your heaviest lift with a safety margin. If your load approaches 20 ton frequently, a heavy-duty double girder gantry is advisable for robustness. For occasional or lighter 20 ton lifts, a single girder design may suffice and can be more economical.

2. Span and Height: Determine the required span (the distance the crane must bridge) and lifting height (ceiling clearance or free lift height needed). The crane's dimensions must fit the worksite. For very long spans (over 20–30 m), a truss or double girder design may be best.

3. Environmental Constraints: Indoor or outdoor? For outdoor windy sites, consider a truss gantry to reduce wind load. For sites with limited building structure, a full gantry (all legs on ground) or mobile gantry may be required. If one side can attach to a runway, a semi gantry saves steel.

4. Leg Style: Choose A-frame legs for maximum stability, L-type legs for extra clearance for long loads, or U-type legs if clearance under the crane is needed. U-type is useful if trucks or large objects must pass under the crane.

5. Frequency and Speed: Higher duty operations (many lifts per hour) benefit from double girders, multiple hoist speeds, and stronger brakes. Light duty or maintenance cranes may not need premium specs.

6. Control and Power: Decide on pendant control, wireless remote, or cabin. Cabin controls are useful for frequent use or extended spans. Ensure the site's electrical supply (e.g. 380 V 3-phase) matches crane requirements.

7. Standards and Custom Needs: Look for CE, TUV, or ISO certification to ensure quality. Check if any special customization is required (e.g. special wheels, vibration isolation, instrumented scales).

In summary, compare the project requirements (load, span, environment) against the crane types. For example, if you need a low-cost crane for 15–20 ton loads and moderate use, a Single Girder 20 ton Gantry Crane may work. If you have large loads and heavy use, a Double Girder 20 ton Gantry Crane provides extra strength. Consult with Yuantai's experts to ensure the crane fits the span, height, and load spectrum.

Maintenance Guide

Proper maintenance keeps a gantry crane safe and reliable. Follow these guidelines:

• Daily Inspections: Before each shift, inspect critical components. Check hooks for cracks or deformation. Examine wire ropes and chains for wear or kinks. Look at sheaves and pulleys for sharp edges or misalignment. Test limit switches: run the hoist up and down to ensure the upper and lower limits stop the motion properly. Verify the travel brakes engage.

• Lubrication: Grease moving parts regularly. Apply oil or grease to wire ropes, gearbox, trolley wheels, and crane bearings as per schedule. Good lubrication prevents wear. Confirm that all grease points and gearboxes are serviced at the recommended intervals.

• Weekly Checks: Inspect the crane structure and rail alignment. Tighten bolts on end carriages and girders. Check travel wheels and rails for wear or debris that could cause derailment. Ensure end stops and buffers are secure. Test all safety devices and alarms.

• Monthly Testing: Perform functional tests on brakes, limit switches, and controllers. Measure brake pad wear and adjust if needed. Check electrical panels for loose connections.

• Annual Inspection: Have a qualified technician perform a thorough audit. This includes nondestructive testing (NDT) of high-stress parts (e.g. hook, beams) and a comprehensive check of all components. Ensure compliance with any local crane safety standards.

• Record Keeping: Keep a maintenance log. Document all inspections, repairs, and modifications. This history helps spot recurring issues and demonstrates due diligence.

Regular maintenance reduces downtime and extends the crane's life. As one source notes, poor maintenance can lead to failures and hazards. Yuantai provides support and spare parts to help maintain peak performance. For example, limit switch function should be verified and worn ropes replaced immediately.

Customization Options Available

Yuantai offers extensive customization for 20 ton gantry cranes to match your exact needs. Options include:

• Steel Grade and Paint: Choose from high-strength Q235B or Q345B steel. Standard paint colors (blue or yellow) or custom colors are available. For outdoor cranes, special coatings can resist weather.

• Span and Height: Set the bridge span (distance between legs) anywhere from about 8 m up to 35 m or more. Choose lifting height (hook travel) per your building clearance.

• Leg and Support Design: Specify leg style – fixed-height, adjustable, or mobile (casters), with A-frame, L-shape, or U-shape outriggers. This lets cranes adapt to site constraints.

• Hoist Type and Speed: Select the hoist model. You can pick a single-speed or dual-speed electric hoist (CD1/MD1), or even an open winch style. Options include stepless (VVVF) drives for smooth operation.

• Power and Controls: Options include voltages (e.g. 380V 3-phase, 415V, etc.). Control method can be floor-mounted pendant, wireless remote, or operator cabin. Customized control logic, push-button stations, or PLC integration can be added.

• Mobility and Rails: For portable needs, we can fit the crane with rubber wheels or a bogie for ground rails. For fixed cranes, you can choose rail type (profile steel rail) and layout (single or bi-rail).

• Additional Accessories: Overload protection devices, rope length limiters, anti-sway systems, or CCTV cameras can be installed. Optional attachments like grab buckets or electromagnetic fixtures are also available.

• Certification and Standards: We can build cranes to meet specific national standards or project requirements. All cranes are CE certified and can carry other certificates as needed.

In short, every aspect of the crane can be tailored. As Yuantai notes, it provides “tailor-made solutions” for special needs. Whether you need an unusual span, high-duty design, or special attachments, the 20 ton gantry crane can be customized. For example, the semi-gantry model offers "multiple capacities, spans, and lifting heights to suit specific needs". Contact Yuantai with your parameters (lifting capacity, span, height, environment) and we will engineer the right configuration.

Frequently Asked Questions

• What are the typical applications of a 20 ton gantry crane?
  20 ton gantry cranes are used in industrial yards, steel factories, shipyards, construction, and logistics. They handle heavy parts, equipment, and materials – for example, lifting steel beams, containers, machinery, or concrete forms. Outdoor models (truss or U-type) suit rough terrain; indoor models manage factory assembly lines.

• How do I maintain a 20 ton gantry crane?
  Perform daily visual inspections of the hook, wire rope, and limit switches. Lubricate moving parts weekly. Test brakes and controls regularly. Follow the manufacturer's checklist. Keep rails clear of debris. Replace worn parts promptly. An annual professional inspection is recommended for safety.

• Single vs. Double Girder – which is better for 20 ton?
  If your work is heavy-duty or continuous, a double girder crane provides extra strength and a higher lift height. For lighter-duty use or lower budget, a single girder gantry (up to 20 ton) is more economical. The choice depends on span and frequency of use.

• Can a 20 ton gantry crane be customized for unusual spans or environments?
  Yes. Yuantai custom engineers crane spans, heights, and leg styles to match site requirements. You can specify long spans, tall hook heights, or special rail layouts. For example, if you need extra clearance underneath, choose an L-type or U-type gantry. If you need a taller hook height, we can raise the leg height or use wheels with extended bearings. Tell us your specs and the crane will be designed accordingly.

• How do I choose 20 ton gantry crane parts like the hoist or control?
  Pick a hoist rated for 20 ton lifts (usually a CD/MD series wire rope hoist). Consider two-speed or VVVF control for precision. For controls, you can choose a pendant, cabin, or wireless remote. Ensure the hoist has safety features like mechanical brakes and overload protection. All parts are industrial-grade and meet safety standards.

• Where can I get a 20 ton gantry crane for sale?
  Yuantai Crane supplies factory-direct 20 ton gantry cranes worldwide. You can contact Yuantai for quotes; they have a range of stock designs and can build custom cranes. All cranes are CE-certified and built in a ISO factory.