Product Overview

The Double Girder 40 Ton Gantry Crane represents a specialized lifting solution designed specifically for the stone industry. This heavy-duty equipment addresses the unique challenges of handling granite, marble, and other natural stone materials in various industrial settings. With its robust construction and precision engineering, this crane meets the demanding requirements of stone yards, fabrication shops, and processing facilities where reliable material handling is essential for operational efficiency and workplace safety.

Technical Specifications

Parameter	Specification
Lifting Capacity	40 metric tons
Span Length	12-35 meters (customizable)
Lifting Height	6-18 meters (adjustable)
Main Girder Type	Double box girder construction
Work Duty Class	A5-A7 (medium to heavy duty)
Lifting Speed	0.8-8 m/min (variable frequency control)
Traveling Speed	5-20 m/min (crane) / 10-30 m/min (trolley)
Power Supply	380V/415V, 50Hz/60Hz, 3-phase
Control System	Pendant control with optional radio remote
Safety Features	Overload protection, dual limit switches, emergency stop

Design Features

Structural Configuration

The crane utilizes a double girder design that provides superior stability and load distribution compared to single girder alternatives. The box girder construction offers optimal strength-to-weight ratio while maintaining the structural integrity necessary for handling heavy stone slabs. The reinforced end trucks and carriage system ensure smooth operation under full load conditions, with minimal deflection across the entire span length.

Lifting Mechanism

Equipped with a heavy-duty hoisting system featuring precision gear transmission and thermal-protected motors, the crane delivers consistent performance in demanding stone yard environments. The wire rope drum assembly is engineered for even spooling and extended service life, while the hook assembly includes rotation prevention features crucial for handling stone slabs.

Control and Operation

The crane incorporates user-friendly control systems with smooth acceleration and deceleration characteristics. The variable frequency drive technology enables precise load positioning, which is particularly important when handling finished stone products where surface protection is critical. Optional radio remote control allows operators to maintain optimal visibility during lifting operations.

Stone Industry Applications

Material Handling Scenarios

This gantry crane serves multiple functions in stone processing facilities, including loading and unloading of raw stone blocks from trucks, transferring slabs between processing stations, and organizing finished materials in storage yards. The design accommodates various lifting attachments suitable for different stone handling requirements, including C-hooks for slabs and vacuum lifters for finished products.

Processing Workflow Integration

The crane facilitates efficient workflow in stone fabrication facilities by enabling seamless transfer of materials between cutting, polishing, and finishing stations. Its precise positioning capabilities allow operators to carefully place stone slabs onto processing equipment without compromising material quality or worker safety.

Safety Considerations

Load Security

Multiple safety systems ensure secure handling of valuable stone materials. Overload protection devices prevent exceeding rated capacity, while redundant braking systems provide fail-safe operation. Anti-sway technology minimizes load swing during transportation, reducing the risk of material damage or workplace accidents.

Operational Safety

The crane includes comprehensive safety features such as emergency stop buttons at multiple locations, warning alarms during crane movement, and limit switches for all travel motions. The structural design incorporates appropriate safety factors and regular inspection points to maintain operational integrity over the equipment’s service life.

Configuration Options

Span and Height Variations

Customers can select from standard span configurations or request custom dimensions to match specific facility layouts. The crane’s lifting height can be adjusted to accommodate different storage rack systems and processing equipment heights commonly found in stone industry applications.

Power Supply Alternatives

While typically configured for standard industrial power supplies, the crane can be adapted for alternative power sources including generator sets or electrified rail systems. Special environmental protections are available for installations in coastal areas or regions with extreme weather conditions.

Installation and Maintenance

Site Preparation

Proper installation requires adequate site preparation including reinforced concrete foundations and precision-aligned runway rails. Our technical team provides comprehensive installation guidance and can supervise the commissioning process to ensure optimal performance.

Service Support

Regular maintenance protocols and service intervals are established to maintain peak operating condition. Local service support and technical documentation ensure that maintenance personnel can properly care for the equipment and address any operational issues that may arise.

Industry-Specific Advantages

The 40-ton double girder gantry crane offers distinct benefits for stone industry applications. The robust lifting capacity accommodates the heaviest stone blocks and slabs, while the precise control system enables careful handling of finished materials. The design’s versatility supports various lifting attachments and can be integrated with existing material handling systems in stone processing facilities.

This equipment represents a reliable solution for stone yards and fabrication shops seeking to improve their material handling efficiency while maintaining the highest standards of operational safety and material preservation.