- Aug 11, 2025
- Case Studies
30 Ton Double Girder LH Crane to the Philippines
Check out our 30 Ton Double Girder LH Crane heading to the Philippines! Perfect for heavy lifting, this crane combines power and reliability.
The customer needed a heavy indoor lifting system to move large equipment inside a production bay. They had recently added new machining centers and large test rigs. These pieces arrive in modules that weigh several tonnes. The plant layout left no space for mobile cranes or extended fork trucks. The customer therefore asked for an overhead solution that could:
- lift up to 30 tonnes safely and repeatedly;
- traverse the full width of the workshop on a fixed runway;
- place heavy equipment with fine positional control; and
- work reliably over long shifts with predictable maintenance intervals.
They wanted the crane mounted on a structural steel frame inside the building. The frame would carry runway loads and keep the floor clear. After the crane was installed, the client planned to repaint the supporting steel frame. That repainting would protect the structure and give the workshop a finished look once the crane was live.
Problems Before the Crane Installation
Before installing the new double girder LH overhead crane, the customer depended on temporary lifting methods that caused ongoing problems. Large lifts required rented truck cranes, which needed outside space and clear road access, often leading to long waits and project delays. Smaller moves relied on forklifts, but these required frequent re-rigging, extra labor, and added time for every lift. Positioning accuracy was also poor, so workers had to manually adjust loads using chains, shims, and pry bars, increasing both time and risk of damage. At the same time, mobile cranes and forklifts crowded the shop floor, blocked key aisles, and disrupted normal production flow, raising safety concerns. Together, these issues reduced efficiency, slowed commissioning, and increased operating costs, driving the need for a permanent overhead crane solution that could work within the existing building and remove these bottlenecks.
30 Ton Double Girder LH Crane Design
We supplied a 30 ton double girder LH overhead crane engineered for indoor heavy equipment handling. The design prioritized load control, operator ergonomics, and straightforward maintenance.
1. Double girder bridge structure and steel frame mounting
The crane uses a double girder bridge. Two box-section girders run the full span. That layout increases bridge stiffness and lowers midspan deflection when the crane carries heavy, asymmetric loads. The bridge rides on heavy end trucks that run on rails fixed to the client's steel frame. The customer asked for the crane to be mounted on a steel frame rather than on the building columns. The frame was sized and checked by structural engineers to absorb vertical and horizontal runway loads. After crane erection, the client repainted the frame to restore corrosion protection and to match the workshop finish.
2. High-capacity wire rope hoist and load handling gear
The hoisting unit is a proven wire-rope hoist sized for 30 tonnes. We specified a drum diameter and rope class that meet fatigue and bending life requirements for heavy, repetitive duty. The hoist has dual-speed lifting: a fast travel speed for empty hook positioning and a slow, low-speed mode for precise placement under load. We fitted a robust suspension block and heavy swivel hook. The hoist gear uses sealed grease-lubricated bearings and a spring-applied, electrically released brake system. The brake holds the load securely when the hoist is stationary or if power fails.
3. Motion control and operator interface
The bridge, trolley, and hoist drives use variable frequency drives (VFDs). VFDs provide smooth acceleration and deceleration, which reduces pendulum swing and lowers dynamic stress on the structure. The crane operator controls moves from a wireless remote or from a cabin, depending on the task. The remote includes an emergency stop. We integrated anti-sway functionality in the control system. Anti-sway reduces pendulum motion automatically during travel. That control shortens cycle time and reduces the need for manual operator corrections.
4. Safety systems and monitoring
We installed redundant mechanical and electronic limit switches for travel and hoist height. An electronic overload limiter protects the hoist from lifting beyond rated capacity. The crane features an anti-two-block device to prevent the hook block from contacting the hoist head. All electrical panels use industrial IP ratings to resist dust and humidity. The control cabinet includes a programmable logic controller (PLC) for diagnostics, run-time logging, and basic predictive alerts.
5. Installation, commissioning and frame repaint
Given the steel frame mounting, installation required precise rail alignment. We used laser trackers and alignment jigs to hold rail tolerances within design limits during erection. After we commissioned the crane, the customer applied the final paint to the frame. That repaint was scheduled after system checks to avoid damage during mechanical adjustments. The overall solution matched the workshop geometry and gave the customer a fixed lifting resource that cleared floor space.
How the Crane Handled Diverse and Challenging Tasks
Once commissioned, the crane took over a wide range of heavy handling tasks that earlier depended on rented equipment and ad-hoc rigging. The following paragraphs explain how the crane performed in representative workflows.
1. Large equipment placement and machine relocations
The crane moved complete machine modules—frames, gearboxes, and assembled axes—across the bay. These modules required controlled lifting and rotation to align anchor points with the foundation bolts. The crane's low-speed hoist and anti-sway control let the operator place modules within a few centimeters of their target lines. In many cases, technicians completed bolting without additional repositioning.
The double girder bridge reduced girder deflection under off-center loads. That stability simplified the alignment of long modules where end-to-end twist would otherwise complicate installation.
2. Heavy tooling and die changeovers
Production tooling and dies—sometimes weighing multiple tonnes—moved from storage to machining and press areas. The crane lifted tooling directly from storage racks, rotated it as needed, and lowered it onto fixtures. The operator used creeping speed for fine placement. The crane removed the need for multiple forklifts and reduced the manual handling of heavy tooling.
3. Test rig assembly and transport
Assembly of large test rigs occurred in-house. Teams built rigs in sections, then the crane lifted and joined them into a final assembly. The crane's large span and travel range let technicians assemble parts in place instead of moving them across multiple workstations. This approach saved handling steps and lowered re-assembly time.
4. Scheduled plant moves with minimal disruption
When the plant reconfigured a production line, the crane handled all heavy lifts inside the building. The fixed runway and internal frame avoided external crane mobilization. The renovation work proceeded without blocking access routes outside the building. The internal lifts reduced plant downtime for reconfiguration.
5. Handling asymmetrical and awkward loads
Some components had uneven mass distribution. With a single central hook, the crane operator used spreader beams and sling arrays to control load geometry. The double girder bridge provided a rigid platform for long spreader beams. The crane moved these awkward loads safely and positioned them for bolting without reorientation by floor crews.
Advantages of 30 Ton Double Girder LH Crane
After the cranes were put into operation, the customer's production underwent several changes that made its plant run more smoothly and efficiently.
1. Reduced dependency on rental equipment
The customer removed routine reliance on external truck cranes for indoor moves. That change cut crane rental scheduling and related logistics. With a permanent overhead crane, the plant regained control of lift timing and reduced external crane mobilization costs.
2. Faster installation cycles
Typical multi-ton equipment installs moved from multi-hour sequences with external rigs to single-session in-house lifts. The crane reduced per-install handling time by combining lifting and exact placement in one operation. That reduced the overall project cycle for equipment fits.
3. Clearer floor space and safer workflows
Because the runway carried loads overhead, site staff no longer needed forklifts in busy aisles during heavy lifts. The overhead path freed floor lanes and lowered collision exposure. Operators used the wireless remote to stand clear of suspended loads while positioning them.
4. Predictable maintenance and uptime
The crane's modular components and built-in diagnostics simplified preventive maintenance scheduling. Visual and electronic checks followed specified intervals. Predictable maintenance reduced unplanned stops and improved planning for production runs.
30 Ton Double Girder LH Crane Product
Designing and operating heavy overhead cranes requires adherence to reputable standards. We engineered the crane to meet relevant guidance for safe overhead lifting.
- OSHA's overhead and gantry crane rule (29 CFR 1910.179) sets general requirements on clearances, inspection, and safe operation. The rule references established industry specification for dimensions and safety features. We incorporated the guidance into the project's engineering and commissioning checks.
- For crane duty classification and lifecycle expectations, ISO 4301-1 provides a framework to select service class and design life. We used those classification principles to size components and to specify rope and gearbox spare life.
- The Crane Manufacturers Association guides structural and fatigue parameters for overhead cranes. Designing to widely accepted crane criteria reduces repair risk and supports predictable service life.
- Automated load-sway control and modern drive systems shorten cycle time and reduce operator workload. Published industry guidance notes that these technologies can halve cycle times in repeated pick-and-place workflows and lower mechanical wear by smoothing acceleration and stopping. We included anti-sway control for precisely that reason.
Meeting recognized standards and adopting proven electronic control measures gives the customer both safety evidence and an auditable maintenance trail.
30 Ton Double Girder LH Crane Product
The double girder LH crane offers several advantages when used for indoor heavy equipment moves.
1. Structural stiffness and low deflection
Double girders deliver higher bending stiffness than single-girder equivalents. That matters when moving long, off-center loads. Low deflection reduces the final work required to align equipment after placement. The effect shows up as fewer manual adjustments and faster commissioning.
2. Higher trolley capacity and larger hoist sizes
Double girder bridges allow larger hoists and bigger drum diameters. Larger drums improve rope life and reduce bending stress. The LH crane uses a hoist spec that balances drum diameter and drum wrap to extend rope life under frequent heavy lifts.
3. Easier integration of auxiliary gear
Double girder bridges permit easy installation of auxiliary devices such as spreader beams, rotators, and multi-point rigging points. Those integrations simplify lifting complex or long items. They also let the operator change lifting patterns without changing the bridge.
4. Better access for inspection and maintenance
The bridge top on a double girder crane gives more room for hoist access and inspection platforms. Technicians can get to gearbox and motor mounts without removing components. That access lowers maintenance duration and downtime.
5. Smooth motion and operator control
With VFDs and modern drive systems, operators achieve smoother starts and stops. Smooth motion reduces load swing and preserves the steel frame and runway rails. It also improves placement repeatability.
Yuantai 30 Ton Overhead Crane
Oher Applications and Industries of Double Girder LH Crane
While this project demonstrated the crane's ability to handle inside heavy equipment, the versatility of a 30-ton double girder LH crane goes far beyond that. Its high load capacity, sturdy double-beam structure, steady travel mechanisms, and advanced control options make it an excellent choice for a variety of applications. Whether it's precise assembly, heavy manufacturing, or specialist material handling, the same fundamental design works in a wide range of operational environments. The following are some good examples of when and how crane technology provides measurable value.
1. Machine tool installation and maintenance facilities
In large-scale machine tool manufacturing plants or repair workshops, heavy components like spindles, bed castings, column structures, and rotary tables require careful handling. A fixed overhead double girder crane streamlines the process of machine tool assembly and maintenance, allowing for fast yet precise installation of heavy parts without relying on multiple mobile lifting devices. This setup not only reduces required floor space by eliminating the need for forklifts but also minimizes downtime during tool changes and reconfiguration.
2. Power generation equipment handling
Power generation facilities—such as hydroelectric, thermal, or nuclear power plants—often handle extremely large and heavy equipment like turbine rotors, generator stators, heat exchangers, and condenser units. The crane’s high hook height allows for vertical clearance over bulky machinery, while its precise positioning capabilities ensure that delicate, high-value components can be maneuvered with millimeter accuracy.
3. Heavy fabrication and metalworking plants
In heavy fabrication shops, tasks often involve lifting and transporting large steel structures, press frames, or oversized welding jigs. A double girder LH crane provides the structural rigidity and span length to move these items directly between welding bays, machining stations, and assembly lines. By reducing the need for intermediate storage and manual transfers, the crane supports continuous production flow and reduces handling-related bottlenecks.
4. Precast concrete or composite panel manufacturing
The production of large precast concrete elements or composite building panels demands equipment that can handle wide loads and ensure accurate placement into molds or curing racks. The double girder LH crane’s rigid bridge design minimizes deflection, enabling consistent, repeatable movements when transferring materials. In indoor manufacturing halls, the crane protects products from environmental exposure while streamlining high-volume, repetitive lifting tasks.
5. Aerospace and defence assembly
The assembly of aircraft fuselages, wing sections, satellite components, and missile systems requires exceptional precision and stability during lifting operations. Anti-sway control systems paired with fine-speed hoisting enable delicate positioning within tight tolerances. In clean or controlled environments, the crane’s advanced controls ensure safe handling of both oversized and sensitive components without risking surface damage or misalignment.
6. Ship outfitting and marine component shops
Shipbuilding and marine equipment workshops often require heavy lifting inside enclosed hull sections or prefabricated modules. The long span of a double girder crane allows it to bridge wide work areas, while its robust hoist capacity makes it ideal for moving engines, propeller assemblies, and large outfitting components. The enclosed environment benefits from the crane’s fixed overhead design, which avoids congestion in tight workspaces.
