- Feb 25, 2026
- Case Studies
5T and 6T Overhead Cranes for an Australian Manufacturer
Discover reliable 5t and 6t overhead cranes designed for Australian manufacturers. Boost your workflow with custom lifting solutions—learn more!
A leading Australian manufacturing plant needed to improve its heavy‐lifting capabilities. The client's facility produces large industrial equipment and processes, with frequent handling of bulky and heavy components. However, the existing material‐handling setup – mainly forklifts and manual hoists – created bottlenecks, safety hazards, and floor congestion. In particular, two work bays required the ability to lift loads up to 5 tons and one bay up to 6 tons on a span of 10.9m under limited headroom. The challenge was to install indoor high-duty overhead cranes that could operate reliably under continuous use, meet Australian standards, and fit within the existing building height.
Our Lifting Solution: Double-Girder Overhead Cranes
To solve the client's needs, we engineered three bridge cranes: two with 5t capacity and one with 6t capacity. Each crane spans 10.9m and delivers a 6.15m hook height. All are top-running, double-girder EOT cranes, fitted with robust European‐style NR electric wire rope hoists (one hoist per crane). The cranes are controlled by pendant buttons (with optional radio control) for precise operation. This configuration was chosen because double-girder cranes are ideal for lifting frequent heavy loads and give greater strength, stiffness and hook height.
Crane Design Features
For many manufacturing plants, limited building height and high daily lifting frequency create real challenges. In this case, the customer required 5t and 6t overhead cranes that could operate under a low ceiling while handling frequent lifts every day. We focused on maximizing hook height, ensuring structural strength, and providing smooth, precise control.
1. Single-Girder Structure
Both cranes use a single-girder bridge design, where the girder carries the hoist and trolley along rails mounted on top of the beam. This structure increases the effective lifting height, which was very important because the factory ceiling height was limited to 6.15 meters. By placing the hoist on top of the girder, we maximized hook travel without changing the building structure. The girder was engineered with strong steel plates and precise welding to ensure high rigidity. Even during frequent lifting of 5-ton and 6-ton loads, the crane remains stable and shows minimal deflection. For a manufacturing environment that operates daily, this rigidity helps reduce vibration, protect components, and extend service life.
2. Construction
These cranes are designed to meet CMAA Class D/E and ISO A5 duty standards. This means they are built for frequent use and can handle more than 200,000 lifting cycles during their lifetime. In a production workshop, lifting tasks happen throughout the day. Motors start and stop often. Loads move repeatedly across the bay. To handle this, we selected heavy-duty motors, reinforced end trucks, and high-quality gear systems. The structure and mechanical components are designed to reduce fatigue and prevent overheating during long operating hours.
3. NR Electric Wire Rope Hoists
Each crane is equipped with an NR-series electric wire rope hoist. This type of hoist is ideal for 5-ton to 6-ton lifting tasks because it provides strong lifting power, stable operation, and higher lifting speeds compared to chain hoists. A wire rope hoist handles heavier loads more smoothly, especially at greater lifting heights. The NR hoist uses dual-drive motors mounted directly on the drum, which ensures smooth starting and stopping. This design reduces rope slack and minimizes sudden movement. During installation and testing, the customer noticed how steady the loads moved, even when positioning heavy machine components.
4. Controls and Safety
The cranes are operated by pendant push-button controls, which are simple and reliable for workshop use. We integrated essential safety devices, including upper and lower limit switches, overload protection, emergency stop circuits, and reliable braking systems. These features protect both the operator and the equipment. All components meet Australian standards such as AS 1418 and AS 2550, as well as ISO 4301 and CMAA requirements. Electrical parts are sealed to IP54 protection level, suitable for indoor industrial environments. During commissioning, we carefully tested every safety function to ensure stable and compliant operation before handover.
Crane Specifications and Customization
1. Capacities & Dimensions
This project included two 5-ton overhead cranes and one 6-ton overhead crane to meet different lifting needs inside the same workshop. The span is 10.9 meters, with rails rigidly fixed to the building columns. The lifting height is 6.15 meters, which allows enough vertical space for handling large components safely. We carefully matched the rail centers and runway system to the existing building structure. This step is very important when you install cranes in an existing factory. It helps avoid costly structural changes and ensures smooth installation.
2. Duty Class
The cranes are designed to ISO A5 duty class, which corresponds to CMAA Class D/E. This means they are suitable for high-frequency and heavy-duty industrial work. The client runs multi-shift production, so the cranes need to handle frequent lifting every day without performance issues. Choosing the right duty class is critical. If the class is too low, parts will wear out quickly. If it is too high, you may overspend. In this case, A5 provides the right balance between durability and cost for a busy manufacturing environment.
3. Hoist Model
NR-Type Electric Wire Rope Hoist
We selected an NR-type wire rope hoist rated at 5 tons and 6 tons. The hoist uses dual-speed control, which allows slow and precise positioning as well as faster lifting when needed. A heavy-duty brake improves safety during operation. The wire rope diameter is sized with a safety factor greater than 5:1, which increases reliability and long service life. The rope drum and guide system ensure smooth winding and reduce rope wear.
4. Trolley
The hoist trolley is motor-driven and runs on top of the bridge. It uses four drive wheels and efficient gearboxes for stable travel. We applied VFD (Variable Frequency Drive) control to the trolley motion. This allows smooth acceleration and deceleration. Precise control not only improves safety but also reduces mechanical stress on the structure. For manufacturing plants that require careful positioning of tools or equipment, this feature makes daily operations much easier.
5. Main Beam Structure
The bridge uses welded steel box girders and is painted in safety yellow for high visibility. Box girder construction provides strong load capacity with minimal deflection. The end trucks are equipped with large-diameter wheels and sealed bearings for smooth travel and low maintenance. The design considers the crane’s own weight plus an additional 25% dynamic load, in line with industry standards.
6. Control Voltage
The cranes operate on 415V, 3-phase, 60 Hz power supply, which matches Australian industrial standards. The control system includes a durable pendant with six buttons for up, down, left, right, and emergency stop. The pendant is simple and easy to use. We also offered an optional wireless remote control for greater flexibility.
Bridge Cranes for Light and Medium Duty Applications
Challenges and Solutions
In this project, there were more structural constraints in the client's environment and they had tighter production cycle requirements. In addition to this, the client was in a position where they needed to continue their day-to-day operations during the construction period. This requires careful planning and precise engineering. From design to production, transportation and installation, we focus on solving every problem of our customers to ensure that the cranes can operate safely and efficiently without affecting production.
1. Limited Overhead Clearance
The low headroom in the client's facility resulted in very limited crane installation space and lifting height. For you, this kind of limitation can directly affect how high you can lift materials and how efficiently your workshop operates. To solve this, we selected the NR low-headroom hoist design and matched it with compact end trucks. This design reduced the space taken by the hoist and trolley system. As a result, the hook could travel much closer to the roof structure. The recovered headroom allowed the crane to lift materials to the maximum possible height, improving storage flexibility and workflow efficiency inside the factory.
2. Existing Structure
The factory already had runway beams in place, but they were originally designed for lighter loads. A double-girder overhead crane creates higher wheel loads and different stress conditions. If you install a heavier crane without checking the structure, you may face long-term safety risks. We carried out a full structural analysis of the existing runways. Based on the results, we provided detailed reinforcement recommendations. The client strengthened the runway girders before installation. This ensured the structure could safely support the new cranes and maintain stable long-term operation.
3. Tight Schedule
The project timeline matched a planned production upgrade, so delays were not acceptable. For any manufacturer, downtime means lost revenue and interrupted supply commitments. To stay on schedule, we carefully managed procurement and production. We pre-ordered key components such as motors and electrical control systems to avoid supply chain delays. At the same time, we arranged parallel production steps. While one crane was being fabricated, another was in the welding stage. We also kept close communication with the client’s site team to prepare for installation in advance. This approach helped us complete delivery and installation on time, without affecting their production plan.
4. Safety in Installation
Installation took place under the existing runway system, which increased safety risks. Working at height always requires strict control. To protect everyone on site, we implemented full fall protection measures and clearly barricaded the work area. We followed Australian site safety regulations at every stage. This gave us better control and reduced the risk of accidents.
Client Feedback and Ongoing Support
The plant's equipment manager gave us this feedback: “The new 5t and 6t cranes are running very smoothly with heavy loads. Moving parts between stations is now stable and precise. We appreciate the quick commissioning and professionalism of the team. If any colleagues need cranes, we will definitely recommend this solution.”
Other Applications of This Crane Design
While this case highlights an Australian manufacturing plant, the benefits of 5–6t single-girder overhead cranes are far-reaching. These cranes are versatile, designed to safely lift heavy loads indoors across many industries.
1. Metal Fabrication and Steel Mills
In metal fabrication and steel mills, these cranes excel at lifting and moving dense, heavy items such as steel plates, molds, and castings. You can handle loads weighing several tons with ease, keeping production lines efficient and safe. The single-girder design maximizes headroom, allowing you to lift items higher without structural interference. Frequent heavy lifts are no problem, as the durable wire-rope hoist is built to withstand continuous industrial use.
2. Automotive & Machinery Plants
For automotive and machinery plants, the crane simplifies handling engines, transmissions, and large machinery components. You can move these items along assembly lines or between workstations without delays or excessive labor. Its precision control makes positioning parts more accurate, reducing the risk of damage and improving overall workflow efficiency. If your production process involves heavy assemblies, this crane can become an essential tool in daily operations.
3. Mining and Bulk Material Handling
Even in mining or bulk material handling facilities, these cranes have a role, particularly in indoor or covered maintenance areas. You can easily lift heavy equipment parts, loader buckets, or replacement components during routine servicing. Their indoor rating and durability ensure that your machinery maintenance workflow is faster, safer, and more predictable, reducing downtime and improving operational efficiency.
4. Energy Sector
In the energy sector, whether in conventional power plants or renewable energy workshops, these cranes are invaluable. You can handle heavy turbines, generator parts, or wind turbine components without relying on multiple lifting setups. The crane’s modular design also allows integration with production automation if your workshop scales up. Indoor reliability ensures that sensitive energy components are handled safely and without exposure to environmental hazards.
5. Warehousing and Logistics
Even though warehouses typically handle lighter loads, those that store heavy crates, machinery, or industrial equipment can benefit from these cranes. You can speed up material movement, reduce manual handling, and optimize storage processes. The single-girder, wire-rope solution provides both high hook height and durability, ensuring long-term performance even with frequent use.
Frequently Asked Questions (FAQs)
Q: What is an NR electric wire rope hoist?
A: NR type refers to a standardized European-style wire rope hoist designed for heavy-duty lifting. It features a large drum with wire rope, heavy motors, and dual gearbox drive. This type of hoist has high load capacity, high speed, and precision control. Compared to chain hoists, NR wire hoists can lift much heavier loads and reach higher under the same ceiling. They also typically include safety features like overload protection and reliable braking. In essence, an NR hoist is a robust, heavy-duty hoist ideal for loads of several tons.
Q: How do these cranes compare to using forklifts?
A: Overhead cranes and forklifts serve different needs. Forklifts offer mobility on ground, but they need wide aisles (typically ~12ft) and have much shorter life (10–15 years). Overhead cranes don't take up floor space; they free up the entire floor for production. They are safer for very heavy or high lifts – data suggests overhead systems see fewer accidents than forklifts.
Q: What maintenance is required?
A: Routine inspection is straightforward: check hooks, ropes, brakes, and limit switches monthly as per AS standards. The wire ropes should be lubricated and examined for wear. The robust design means components last long; our sources note that quality wire hoists require less frequent repairs when matched to duty. We provided a spare-parts kit and offer service contracts. As the manufacturer, we stand by the equipment for the long term, and the client can rely on quick support if any issues arise.
