- Feb 11, 2026
- Case Studies
16T, 8T Overhead Cranes for Indonesian Manufacturing Plant
Boost productivity with 16T and 8T overhead cranes designed for Indonesian manufacturing plants. Discover efficient lifting solutions today!
The client is a leading manufacturing plant in Indonesia that produces electronics and industrial products and needed a reliable indoor lifting solution for heavy components. Their production process required frequent movement of modules weighing up to 16 tonnes between assembly stations, but the building had limited ceiling height. The main requirement was to install overhead cranes with 16 t and 8 t capacities on separate spans of 17.5 m and 17.8 m while maximizing lifting height in the low-headroom facility. Our project scope included designing, manufacturing, shipping, installing, and commissioning two wire-rope hoist cranes on existing runway girders. The customer emphasized the need to lift heavy loads while conserving overhead clearance. To meet this challenge, we engineered customized low-headroom double-girder overhead cranes with frequency-conversion drives and heavy-duty wire rope hoists. This solution provided high lifting capacity, smooth control, and maximum hook height, helping the customer increase throughput safely and efficiently under tight space constraints.
Challenges and Customer Requirements
The customer faced two main challenges: very heavy loads and limited vertical space. The new cranes had to fit under an existing low roof while still achieving the required hook heights of 8.0 m for the 16 t crane and 5.4 m for the 8 t crane, so maximizing lift height was critical. This created a classic low-headroom design requirement. The cranes also needed to cover long spans of more than 17 m and move large assemblies across the plant, such as heavy molds, power units, and smaller subassemblies. Since the cranes would run in a busy manufacturing environment with multiple shifts, the design had to support heavy-duty operation similar to A5/A6 duty class. Precise and stable control was required to align loads with production equipment. Reliability was a top priority because any downtime would stop the assembly line. In summary, the customer needed a low-profile, heavy-duty, high-precision, and energy-efficient crane system that could work reliably in a space-constrained factory.
Our Overhead Crane Solution
To meet these requirements, we supplied two double-girder electric overhead traveling (EOT) cranes equipped with wire rope hoists. The 16 t crane has a span of 17.5 m and a hook lifting height of 8.0 m; the 8 t crane spans 17.8 m with 5.4 m hook height. Both are top-running double-girder cranes designed for indoor use.
1. Low-Headroom Configuration
We used a compact hoist and carriage arrangement to maximize hook height under the same clearance. In a low-headroom crane, the hoist and end-carriages are integrated into one compact assembly (no extra space above the girder). Low headroom bridge cranes are designed to maximize operational efficiency in spaces with limited vertical clearance. Their compact design allows for higher hook heights and better space utilization, enabling businesses to reduce construction costs by building shorter structures while maintaining a larger usable floor area. In practice, our cranes' hoists sit very close to the girder, shaving off extra centimeters so that the hook can reach up to the full 8.0 m as needed.
2. Double-Girder Structure
For loads of this magnitude, we chose a double-girder design. Double-girder cranes have two main bridge beams instead of one, allowing higher lifting capacity and rigidity. They also give a higher hook height (since the trolley runs on top of the girders) and virtually no span or load limits. This design is ideal for the customer's 16 t crane and provides extra safety margin. For the 8 t crane, double-girder was chosen to match the heavy-duty industrial setting and to keep the design consistent. Compared to a single-girder crane, the double-girder setup delivers greater structural stiffness and a longer service life under heavy cycles.
3. Wire Rope Hoists
Both cranes use high-performance electric wire rope hoists. Wire-rope hoists are the industry standard for heavy-duty lifting (typically well beyond 5–10 t). They offer exceptional load-bearing capability by using multi-strand steel ropes that share the load. This makes them more suitable than chain hoists for 8–16 t lifts. Wire rope hoists also operate very smoothly and with less vibration, thanks to the drum-winding mechanism that maintains even tension. In practice, this means our cranes can lift large, heavy components with stability and minimal load sway. The wire rope system also allows faster lifting speeds. The high-capacity motors and precision gearing of the hoists (combined with VFD drives, see below) ensure quicker lift cycles, which boosts throughput on the shop floor.
4. Frequency Converter (VFD) Controls
Each crane's hoisting and travel drives are fitted with variable-frequency drives (VFDs). This choice was made for smooth, energy-efficient control. With VFDs, the operator can vary the lifting/travel speeds rather than being limited to fixed speeds. As a result, the load can accelerate and decelerate gently, greatly reducing jerks and swings. It also minimizes load swing: gradual speed changes reduce jerky movements and improve load stability. For the customer, this means the new cranes can position heavy loads very precisely on the production line, without risk of abrupt motion or overshoot. Furthermore, modern drives include safety features: for example, in an outage a VFD can brake the load and perform a controlled stop to prevent a free-fall. These capabilities greatly enhance operational safety.
5. Controls and Safety
We provided radio-remote pendant control for both cranes, allowing operators to stand safely clear while controlling lifts. Standard features like overload detection, zero-voltage braking, and adjustable speed levels are included. The electrical panels meet IP55 dust/weather ratings for indoor use. We also integrated limit switches (upper/lower) on the hoists to prevent over-travel. In short, each crane is built and tested to rigorous standards (CMAA specifications, FEM duty ratings, and local regulations) to ensure safe, reliable operation in a busy industrial setting.
In summary, our solution was a pair of custom double-girder EOT cranes with wire rope hoists and VFD control, designed specifically for the customer's space and load requirements. This lifting system meets the high load capacities and precise handling needed in their manufacturing process, while the low-headroom design maximizes the usable lift height. The double-girder structure provides the strength and hook height advantages needed for heavy lifting. The wire rope hoists ensure smooth, efficient heavy lifts. And the frequency drives give fine speed control and safety interlocks.
Crane Technical Specifications
This project required two low-headroom overhead cranes that could lift heavy loads while fitting under an existing low roof. The goal was to maximize hook height without changing the building structure. The cranes had to handle frequent lifting, offer smooth and precise control, and meet strict industrial safety standards. The final design focused on durability, efficiency, and long-term reliability for continuous manufacturing operations.
1. 16 Ton Overhead Crane
The 16 ton crane uses a double-girder, top-running EOT structure to provide strong load capacity and stable operation over a 17.5 m span. It offers an 8.0 m lifting height, which is optimized for low headroom conditions. A high-capacity wire rope hoist handles heavy loads with smooth lifting and lowering. Heavy-duty motors in A5/A6 duty class support continuous industrial use and frequent starts and stops. Variable frequency drives control the hoist, trolley, and bridge movements, so you get precise positioning and reduced mechanical stress. Radio pendant control improves operator safety and flexibility on the shop floor. Built-in safety features include limit switches, an emergency stop system, and an overload limiter to protect both equipment and personnel. The low-headroom end-carriage design helps maximize vertical lift space under the existing roof.
2. 8 Ton Overhead Crane
The 8 ton crane also uses a double-girder, top-running EOT design with a 17.8 m span and a 5.4 m lifting height. It is designed for lighter but still demanding lifting tasks in the same facility. A wire rope hoist ensures stable and controlled lifting, while heavy-duty motors support moderate to heavy daily use. VFD speed control allows smooth acceleration and deceleration, which reduces wear and improves load handling accuracy. Radio pendant control lets operators move freely and maintain a clear view of the load. Safety systems match those of the 16 ton crane, including limit switches and overload protection, so you get consistent safety standards across both cranes.
3. General Design and Compliance
Both cranes are designed for indoor use and built with industrial-grade components such as sealed motors, robust box-section girders, and rolled steel rails. Each hoist uses multiple wire rope falls to achieve the required safety factor and stable lifting performance. All electrical components comply with IEC and ISO standards for crane systems, which helps ensure reliability and global compatibility. With proper operation and maintenance, the cranes are designed to exceed a 20-year service life.
Project Implementation and Management
1. Installation & Testing
Our experienced field engineers supervised assembly in the plant. The runway beams and crane framework were inspected for tolerance. Each crane was assembled on a flat test bed first; we conducted factory acceptance tests there, including no-load run tests and load tests at 100% capacity. After erection on the runway, we repeated the tests with 100% rated load (and spot-check with 125% in brief for certification) as per industry practice. These tests confirmed smooth operation, correct alignment, and safety interlocks. We followed all applicable safety standards during commissioning.
2. Challenges and Solutions
One challenge was the limited vertical space; we addressed this by customizing the hoist-end carriage assembly to be extremely compact. The shortened end trucks required precise machining, but it achieved the needed clearance without sacrificing strength. Another challenge was coordinating with the plant's structure: we ensured the runway was reinforced to handle the double-girder weight. Tight delivery timelines meant manufacturing had to stay on schedule; we mitigated risk by using proven subcontractors and pre-ordering long-lead items. In summary, each obstacle was solved through careful planning and our in-house expertise.
3. Quality Management
Throughout production we enforced strict quality control. The steel girders were shot-blasted and painted with anti-corrosion coatings. Welds were inspected by X-ray where required. Electrical wiring and panels were built to IP55 standards and tested for insulation resistance. After installation, we provided operator training and delivered as-built documentation and manuals.
Customer Feedback and Support
After several months of operation, the customer reported high satisfaction with the crane system and our support. The plant's equipment manager stated that the cranes run smoothly and reliably, meet their lifting needs, and have improved their workflow, and they plan to recommend Yuantai to others in their industry. This feedback confirms that our engineered solution and after-sales service delivered real value. We will also continue to track the subsequent operation of the crane to ensure that the crane always maintains high performance and provide long-term quality after-sales service.
Other Applications of This Crane Design
Beyond this manufacturing case, the same 16 t/8 t low-headroom double-girder crane design can serve many other industries that need precise lifting in limited space. Typical applications include steel mills, automotive assembly plants, power stations, heavy machinery workshops, logistics warehouses, and shipbuilding yards. In steel fabrication shops, it can handle large steel plates under tight roof clearance. In automotive plants, it can lift engines or chassis sections with good positioning accuracy. In power plants, it supports turbine and maintenance components. The low-headroom structure maximizes lifting height, while the robust double-girder design handles heavy loads with high stability. VFD control improves efficiency, smooth travel, and reduces wear. The 8 t version fits commercial logistics and maintenance tasks, while the 16 t version suits heavy engineering operations. The modular design allows future upgrades such as tandem lifting control or integration into automated systems, so the crane can adapt to growing capacity needs and changing workflows.
Frequently Asked Questions (FAQs)
Q: What is a low-headroom overhead crane?
A low-headroom crane is specially designed to fit in workshops with limited vertical clearance. It uses a compact end carriage and hoist arrangement so that the hook is positioned as close to the girder as possible. This increases the available lifting height (hook approach) under the same roof level. In our project, this meant the 16 t crane could still reach 8.0 m even with a low ceiling.
Q: What advantages do wire rope hoists offer over chain hoists?
Wire rope hoists are the preferred choice for medium-to-heavy loads. They can lift very heavy weights (from several tons up to well over 100 tons, depending on the system) because the multi-strand steel rope spreads the load and resists wear. They also operate faster and more smoothly than chain hoists, thanks to powerful motors, precision gearing, and variable-speed drives. This reduces load swing and vibration, which is important for precise placement. Overall, wire rope hoists are more robust and suited for continuous duty – perfect for the customer's 8 t and 16 t applications.
Q: How does a frequency converter (VFD) improve crane operation?
A VFD lets the crane's motors run at variable speeds rather than fixed steps. This provides smoother starts and stops, reducing mechanical shock and making lifts more controlled. With a VFD, the crane can fine-tune speeds for different loads, which cuts load swing and improves positioning accuracy. Modern inverters also include smart features: they monitor motor current to prevent overload and can execute safe stops if a power fault occurs. In short, using VFD drives on our cranes enhances both safety and efficiency.
