40 Ton Double Girder Gantry Crane

Yuantai Crane's 40 Ton Gantry Cranes are robust, heavy-duty lifting systems designed for demanding material handling tasks. These cranes handle loads up to 40 tons and are built with high-strength steel and precision components. They serve ports, terminals, factories, construction sites and other industrial facilities. The series includes several models: a 40 Ton Rail-mounted Gantry Crane and a 40 Ton Rubber-tyred Gantry Crane (RTG) optimized for container handling; a 40 Ton Truss Gantry Crane for very large outdoor spans; plus 40 Ton Double Girder Gantry Crane and 40 Ton U-Type Double Girder Gantry Crane for heavy-duty lifting in workshops or yards. Each model is engineered for reliable, safe operation in its target environment. All cranes are factory-tested and comply with applicable safety and design standards (such as OSHA and CMAA/ANSI specifications) to ensure quality and reliability.

40 Ton Truss Gantry Crane for Outdoor Lifting

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40 Ton Double Girder Gantry Crane

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40 Ton U-Type Double Girder Gantry Crane

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40 Ton Rail-mounted Gantry Crane

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40 Ton Rubber-tyred Gantry Crane

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Model Comparison

Below is a summary of our 40 Ton gantry crane models and their key characteristics:

Each model can be customized in span, lifting height and travel configuration to suit a specific site or application. For example, the Rail-mounted Gantry Crane runs on fixed rails (suited to port quays) while the RTG moves on tires over a paved yard (ideal for container stacking). The Truss Gantry is used where very long spans or higher clearances are needed. The Double Girder models are versatile for general heavy lifting under overhead rails. The U-Type Double Girder has an open frame that allows unobstructed loading under the bridge.

Technical Standards

Yuantai's 40 Ton Gantry Cranes are engineered to meet major industry and safety standards. All new overhead and gantry cranes must comply with OSHA 1910.179 (Overhead and gantry cranes) in the U.S., which mandates design specifications per ANSI/ASME B30.2 (Safety Code for Overhead and Gantry Cranes). We design our gantry cranes to CMAA (Crane Manufacturers Assoc. of America) specifications as well. For example, CMAA Specification 70 covers top-running bridge and gantry cranes (multiple girder) with duty classes A–F. Our 40 Ton cranes typically meet heavy-duty classes (Class D/E) for steel mill and container operations. We also adhere to ISO and European standards: ISO 9001 quality management system in manufacturing, EN 15011 (bridge cranes), and relevant CE/UL requirements for electrical and mechanical safety. Each crane is certified and tested per local regulations (CE marking for EU, or equivalent), and issued with an inspection report on delivery.

Components

Yuantai 40 Ton Gantry Cranes use high-quality components throughout:

• Girders

  The main girders are heavy-duty box or truss beams made from high-strength structural steel (for example, Q345B or equivalent). Double girder design is standard for 40 t capacity, providing stiffness and strength. Box girders offer a compact, sturdy form; truss girders (used on our Truss Gantry models) reduce weight for very long spans. Girders are precisely welded and stress-relieved to minimize deformation. The span (distance between legs or wheels) and girder height are engineered per the load and duty class. End trucks connect to the girders and house the wheelsets for crane travel.

• Trolley and Hoist

  The trolley (or crab) runs on rails atop the girders and carries the hoisting mechanism. For 40 t capacity, we typically use a wire-rope hoist with robust gearbox and motor. The hoist includes a steel wire rope reeved on drum, multi-plate friction brake, and block with heavy hook. In some designs a twin-hoist trolley (two hoists on one girder) is available for long-span lift distribution. The hoist speed and torque meet the crane's duty rating (for example, FEM/ISO ratings). Limit switches for upper/lower travel protect against over-hoist or over-lower. All hoists are designed to ISO and CMAA standards, and the wire rope meets ISO 4309 (inspection and care). The trolley frame is welded steel, and wheels are profiled steel with sealed bearings.

• Legs and Supports

  For rail-mounted cranes, the leg frames are rigid box-section columns, precisely aligned to the runway beams. Flexible-leg design is available to adjust for minor runway misalignment. Each leg carries drive motors (end trucks) and wheels that roll on the rails. The legs are braced to the girders for stability. For RTG cranes, the “legs” are the massive portal frame columns with large pneumatic tires. RTG legs house hydraulic cylinders that steer the wheels and support the bridge. All leg structures are painted with industrial coatings for weather protection (e.g. outdoor anti-corrosion paint).

• Drives and Motors

  Each end truck is powered by an AC motor coupled to a gearbox for smooth crane bridge travel. The trolley travel also uses a motor and gearbox (separate from bridge drives). Motors have the required power (often up to tens of kW) and are matched to the duty cycle. For rubber-tyred cranes, diesel engines with hydraulic drives can propel the crane (standard on many RTGs), or we offer all-electric RTGs (with onboard generator or battery). All motors have industrial insulation and IP ratings (commonly IP54 or better). Variable Frequency Drives (VFDs) are often used for fine speed control and energy savings on bridge and trolley travel.

• Electrical System

  The crane's electrical control system is centralized in a floor-mounted or wall-mounted panel, built to IEC standards. Controls include start/stop and direction for hoist, trolley, and bridge motions. Power supply options include conductor bar (busbar), cable reel (festoon system), or external connections (for RTG cranes). Control methods can be a push-button pendant station, a cabin operator console, or a wireless remote control. Safety circuits use industrial contactors and relays, and optional PLC control is available for automation (for example, programmable anti-collision control between cranes). Emergency stop circuits are redundant. The system includes electrical protection devices (fuses, overload relays) and grounding per OSHA/ANSI requirements.

• Safety Devices

  Our 40 Ton Gantry Cranes incorporate multiple safety devices. These typically include overload protection (load cells or limiting devices) to prevent lifting beyond rated capacity; upper/lower limit switches to stop the hoist travel at end positions; bridge travel limit switches to prevent overrunning the runway; emergency stop buttons accessible to the operator; and protective guards around moving parts. Anti-collision devices (radar or laser sensors) can be fitted on container cranes to avoid contact between adjacent cranes. Optional features include anti-sway control (to damp load swing) and camera-vision systems. All safety devices are tested during commissioning, and circuitry meets OSHA and ASME safety code requirements.

Features

Yuantai's 40 Ton Gantry Cranes offer features that improve efficiency and uptime:

• Heavy-duty construction: Robust steel structure and high-grade components for long service life under heavy loads.

• High performance: Powerful hoist and travel drives with smooth starts/stops and adjustable speed control.

• Flexible operation: Multiple power supply options (busbar, cable reel, battery); operation via cabin, pendant, or remote control.

• Versatile design: Available in box or truss type, fixed-rail or mobile-tyre configuration, with single or double trolley arrangements.

• Advanced safety: Integrated overload sensors, limit switches, and emergency stops. Optional features include anti-collision and anti-sway systems.

• Environmental protection: Weather-resistant painting for outdoor use; motors and electrics rated for industrial environments (e.g. IP54 or better).

• Easy maintenance: Modular components (gearboxes, brakes, electrical cabinet) allow quick access. Grease fittings and lubrication points are centralized.

• Regulation compliance: Designed to ANSI/CMAA and ISO standards with CE/UL certification as needed.

These features ensure the crane performs reliably with minimal downtime. For example, VFD-driven motors save energy and reduce mechanical shock, and standardized parts (e.g. motors, gearboxes) simplify servicing.

Precautions for Use

Safe operation of a 40 Ton Gantry Crane requires proper procedures and care. Operators and supervisors should follow these guidelines:

• Pre-use Inspection: Check the hoist rope, hook (including latch), and swivel for damage or wear. Examine the runways (rails or surface) for obstructions or misalignment. Verify that all limit switches and emergency stops work.

• Capacity and Loads: Never exceed the rated 40 ton capacity. Ensure the load is rigged securely and evenly, using slings, spreader bars or other approved lifting gear. Center the load under the hoist and keep it level.

• Operation: Use smooth motions—avoid sudden starts/stops that can shock the crane. Raise or lower loads gradually. Do not drag loads along the ground. Keep personnel clear of suspended loads. Follow manufacturer's recommended operating speeds and guidelines.

• Environment: Only use the crane in rated conditions. For outdoor cranes, avoid use in storms or high winds. Ensure runway rails are clear of debris and have proper clearance (minimum 3 inches above the rail, per OSHA). For RTGs, operate on flat, firm ground; chock wheels when parked.

• Training: Crane operators must be trained and qualified under OSHA or local regulations. They should understand the control system, limitations, and emergency procedures (e.g. how to stop a load safely).

• Load Testing: After installation, perform a certified load test (e.g. 125% of rated load) before normal use. Periodic re-tests should follow local regulations or standards (often every 5 years for heavy cranes).

Following these precautions helps prevent accidents, equipment damage, and downtime. It is also aligned with regulations – for example, OSHA requires inspection and safe operating practices for cranes at job sites.

Model Selection Guidelines

Choosing the right 40 Ton Gantry Crane model depends on the application and site conditions. Consider these factors:

• Application Type: For heavy container handling (ports or intermodal terminals), a Rail-mounted Gantry Crane or RTG is ideal. The rail-mounted version offers higher lifting heights and speeds for loading ships, while the RTG can stack containers over a wide yard. For general factory use (lifting machinery or materials), a Double Girder Gantry works well under indoor overhead runways.

• Span and Height Requirements: Measure your working area. A Truss Gantry Crane is suited to very long spans (above 30 m) without excessive weight, while box-girder cranes cover moderate spans. Ensure the specified span (distance between legs) and hook clearance meet your needs. We customize span and height for each client.

• Mobility Needs: If the crane must be moved frequently between locations, an RTG (tyred) crane is self-propelled and need not rely on fixed rails. A rail-mounted crane, once installed, stays on its runway.

• Duty Cycle: Assess how often and quickly the crane will operate. High-frequency, heavy loads (like a busy container yard) require a higher CMAA service class (often Class D/E). Yuantai can design cranes to any CMAA class. For lighter, infrequent use, a lower class is sufficient (which can reduce cost).

• Site Conditions: Rail-mounted cranes need a well-built runway structure (steel rails on concrete foundations). RTG cranes require a smooth, paved surface that can support heavy wheels. Environmental factors (e.g. corrosive atmosphere, temperature extremes) may dictate special materials or coatings.

• Budget and Customization: Discuss your budget. We can adjust materials or features (speed, controls) to meet needs. The"U-Type Double Girder" is a popular crane that provides extra under-bridge space for tall loads (like trucks or pipes) while maintaining 40 t capacity.

In all cases, we recommend consulting with Yuantai's engineering team. We use standards like ISO 4301-1 to classify service conditions, ensuring the chosen crane matches your operational demands.

Maintenance Practices

Regular maintenance is essential for safe, reliable crane operation and long life. We advise the following maintenance schedule:

• Daily Inspections: Before each shift, inspect hoist ropes, hooks, brakes, limit switches, and control devices. Listen for unusual noises during operation. Check for loose bolts or deformations. Remove any debris from rail tracks or wheels.

• Lubrication: Apply grease or oil to moving parts regularly. Wheel bearings, guide rollers, hoist ropes, and gear teeth should be lubricated per the manual. Proper lubrication prevents wear and reduces energy loss.

• Mechanical Checks (Weekly/Monthly): Check alignment of runway rails and wheel condition. Verify that the rope drum flange has proper flange contact and the rope is winding neatly. Inspect brake pads for wear. Ensure electrical connections are tight and components (contactors, fuses) are clean.

• Testing Limits and Safety: Test upper and lower travel limits, emergency stops and overload indicators. Ensure they activate reliably. Calibrate overload devices and indicators as specified.

• Periodic Inspections: Perform thorough inspections at recommended intervals (typically every 6 or 12 months) based on usage. These “periodic” inspections include checking structural bolts, welds, ropes for kinks or breaks, and measuring rope wear. 1910.179 OSHA rules define frequent inspections (daily to monthly) and periodic inspections (1–12 months) based on usage conditions. Document every inspection and repair.

• Wire Rope and Hook Care: Replace wire rope when inspection (ISO 4309 criteria) shows wear or broken strands. Hooks should be removed from service if any cracks or deformation appear (OSHA requires certified monthly checks).

• Electrical System: Keep electrical panels dust-free. Verify ground continuity. Test control stations and safety circuits. Replace worn pendant or remote controls.

• Professional Service: Have a qualified crane technician inspect critical components annually (or more often for severe-duty cranes). Follow any local certification requirements. Keep maintenance logs on file.

Adhering to these practices reduces downtime and enhances safety. Yuantai provides a maintenance manual with each crane, outlining all required procedures. Note that many standards (CMAA, ISO, OSHA) mandate maintenance schedules and recordkeeping, so following these guidelines ensures compliance.

Customization Options

Our 40 Ton Gantry Cranes can be customized to match your exact needs. Options include:

• Span and Height: Any span (up to project site limits) and lifting height can be engineered. Extra tall or long cranes are possible with truss designs.

• Bridge and Leg Type: Choose box-girder or truss bridges. Legs can be rigid, flexible, or of special profile. The U-type design provides extra clearance under the bridge.

• Power Supply: We offer supply via conductor bar, festoon cable reel, or on-board diesel/battery systems. Voltage/frequency can be specified (for example, 380V/50Hz, 440V/60Hz, or DC systems). Explosion-proof electrical packages are available for hazardous environments.

• Control and Automation: Options include cabin-operated crane with panoramic view, wireless remote controls, or fully automated movement (PLC-driven positioning). We can add anti-collision radar, load positioning displays, and IoT monitoring.

• Hoist Attachments: Besides a standard hook block, we can fit container spreaders (for lifting 20/40 ft containers), magnets (for steel handling), vacuum grippers, or custom clamps. Auxiliary hoists or jibs are also possible.

• Speed and Duty: Modify hoist and trolley speeds (for example, high-speed trolley on rail cranes). Duty class can be upgraded for continuous use (CMAA F service) or downgraded for lighter duty to save cost.

• Environmental Protections: Special paints (marine coatings for seawater resistance), corrosion inhibitors, or heaters for cold climates.

• Standards Compliance: Cranes can be designed to specific standards (e.g. AS, JIS) or client specifications. For instance, we can package with a TÜV report or third-party inspection if required.

Tell us your application details and any special needs. Yuantai's engineering team will configure the crane (including span, electrical specs, special options) to deliver a system that fits your project.

Contact Yuantai Crane today to discuss your 40 Ton Gantry Crane requirements. Our experts will guide you on the best model and configuration for efficient, safe lifting in your facility.

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