• Jun 16, 2025
• Case Studies

Yuantai 5 Ton HD Bridge Crane to Concrete Factory in Iraq

Check out the Yuantai 5 Ton HD Bridge Crane, now in action at a concrete factory in Iraq! Discover how this powerhouse boosts efficiency and productivity.

Yuantai Crane Group supplied a 5-ton HD single-girder bridge crane with a European wire rope hoist to a newly commissioned precast concrete production plant in Erbil, Iraq. The customer produces large diameter concrete pipe segments and prestressed beams for water infrastructure and construction projects. Precast plants manufacture concrete pipes, culverts, beams, and slabs for roads, bridges, sewer systems, and building foundations. High-volume production necessitates effective material handling to maintain cycle times and product quality. The workplace requires dependable overhead lifting for transporting large molds, reinforcing cages, and finished items.

Industry Background and Customer Profile

Iraq's reconstruction efforts and expansion of water supply infrastructure have spurred demand for precast concrete products. According to the World Bank, Iraq's non‐oil GDP grew by 4.5% in 2023, driven by infrastructure investment and improved security conditions. Precast factories produce concrete pipes, culverts, beams, and slabs for roads, bridges, sewer systems, and building foundations. High‑volume production requires efficient material handling to maintain cycle times and product quality.

Client's Operations and Requirements

The Erbil Precast Plant is a cooperative venture between a major European waterworks contractor and a regional construction firm. The plant produces large-diameter concrete pipes and beams for infrastructure projects in Kurdistan, including indoor casting halls and surrounding outdoor curing yards. The workflow requires flexible material handling to keep up with high-volume mold cycles and strict quality standards.

1. Pouring and Vibrating Large‑Diameter Molds

Operators handle molds that are up to 4m long and weigh up to 5t when loaded with concrete. Precise location under the hoist is required for consistent vibration and cast quality. To reduce concrete segregation or voids, the crane must raise, position, and lower the big molds smoothly.

2. Handling Steel Reinforcement Cages and Prestressing Jacks

Steel cages weighing 1.5t to 2t should be lifted gently and securely into mold forms. Prestressing jacks can also be moved in and out of position using a crane. To preserve design tolerances and minimize reinforcement damage, cages and jacks must be accurately aligned.

3. Lifting Finished Pipe Segments and Beams

Once concrete has reached its initial set, the crane moves 2-5t pipe sections and beam elements from casting beds to curing racks. The crane's dual-speed lift allows operators to quickly transport pieces between bays and precisely put them on storage supports without chipping the edges.

To support these tasks, the plant needed a material handling system with the following characteristics:

1. Load Capacity

Each lift can take up to 5 tons to cover the heaviest filled molds and cured beam segments. The crane's hoist and structure are rated with a safety margin that exceeds this maximum to ensure consistent performance even under dynamic loading.

2. Lifting Height

The crane's hook must reach 6 meters under the bridge girder. This clearance allows for molds to be placed in tall frames and cured elements to be stored on multi-tier racks without hindrance from the roof or overhead utilities.

3. Span Coverage

The 12m girder span allows complete access to casting beds, storage racks, and loading facilities. This extensive coverage allows the crane to serve several production cells without modifying runway supports or employing additional cranes.

4. Precision and Speed

Dual-speed hoisting (rapid at 8m/min for empty hook runs and slow at 0.8m/min for final placement) enables high throughput and ±25mm precision. Operators adjust speeds on the fly to fit production patterns while maintaining control.

5. Durability

The crane operates in a difficult environment with cement dust, high humidity, and summer temperatures of 50°C. Mechanical and electrical components have sealed bearings, IP55-rated enclosures, and corrosion-resistant coatings to withstand harsh conditions with minimal maintenance.

Challenges Prior to Yuantai's Crane Installation

1. Manual and Forklift Handling Limitations

Before installing the bridge crane, the plant used forklifts and mobile chain hoists. Forklifts lifted molds only when partially filled, requiring two to three trips to pour and return empty molds. Mobile chain hoists provided limited capacity (1ton) and required manual shackle rigging at each mold. This process extended the mold cycle time by 15–20minutes per pour and increased labor costs.

2. Poor Precision and Productivity Bottlenecks

Chain hoist positioning lacked the precision needed to align molds on rails, leading to misalignment of concrete elements. Manual adjustments added 10–15minutes of downtime per mold. Forklift transits between casting beds and curing racks created aisle congestion, hindering workflow.

3. Maintenance and Safety Concerns

Mobile hoists required lubrication every 100 operating hours. Brake linings on forklifts wore quickly under heavy duty. Frequent maintenance led to an average of 12 downtime hours per week. Handling heavy, unbalanced molds with forklifts also posed safety risks. The client sought a dedicated overhead lifting solution to improve safety and uptime.

Design and Engineering of the 5Ton HD Bridge Crane

1. Crane Type: Single Girder HD Bridge Crane

Yuantai designed a Heavy Duty (HD) single‐girder bridge crane with the following parameters:

Structural Design Details

The box girder is fabricated from 10mm web and flange plates, welded into a torsion‐resistant section. The crane's deadweight is optimized to reduce runway beam loads by 15%. End trucks feature heavy‐walled steel sections with four forged wheels (HRC 58 hardness) per truck. Wheelbase and track gauge match the plant's runway rails (UIC60 profile). Laser alignment tolerances were held within ±2mm over the 12m span.

2. European NR‑Type Wire Rope Hoist

Yuantai's NR‐Type electric wire rope hoist was selected for its compact headroom and robust design:

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• Capacity: 5ton.
• Hoisting Speeds: 8/0.8m/min via dual‐speed motor.
• Wire Rope: Ø16mm, 1960N/mm², 6×36 FC construction for high fatigue resistance.
• Drum & Gearbox: Four‐stage helical gears with simulated FEA analysis for minimal deformation.
• Brake: DC spring‐applied disc brake, maintaining <0.5mm creep under full load.
• Limit Switches: Mechanical upper/lower plus electronic backup.
• Overload Limiter: Electronic sensor on output shaft with LED display and alarm at 102%.

Low-Headroom and Underslung Trolley

To maximize lifting height, the hoist trolley is underslung, running on the girder's bottom flange. This arrangement reduces headroom requirements by 20% compared to top-suspended trolleys. Top of hook to beam clearance is only 450mm, allowing full 6m hook travel within the facility's 6.5m roof height.

3. Control System and Safety Features

The operator may move goods with accuracy and responsiveness thanks to hoist up/down controls, bridge and trolley travel buttons, high/low speed choices, and emergency stop features. Automatic safeties that stop electrical faults, overloading, and mechanical failures during operation include safety interlocks like phase-loss and phase-sequence protection, overload and slack-rope detection, anti-two-block devices, and redundant limit switches. Apart from these fundamental characteristics, contemporary overhead cranes frequently integrate variable frequency drives (VFDs) and programmable logic controllers (PLCs) to guarantee precise positional precision, smooth acceleration, and deceleration, which lowers mechanical stress and improves load stability.

Installation and Commissioning

Yuantai's engineers conducted an on‑site survey in March 2025. Our team measured runway beam capacity, rail alignment, and headroom clearance. Minor modifications—such as reinforcing lateral bracing and adding rail plates—were recommended to meet the hoist's wheel load.

1. Installation Process

This phase ensures the crane fits your site conditions and works safely from day one. In March 2025, Yuantai’s engineers carried out an on-site survey at the concrete factory in Iraq to fully understand the existing structure and operating needs. The team carefully checked runway beam capacity, rail alignment, and available headroom to confirm the site could support a 5-ton HD bridge crane. Based on real measurements, we suggested small but important upgrades, including reinforcing lateral bracing and adding rail plates, so the runway could handle the hoist wheel load with confidence. After preparation, installation moved quickly and smoothly over four days. The team welded rail plates onto the runway beams and installed rails, keeping alignment within ±1 mm over a 12-meter span to ensure stable crane travel. Box girder sections were lifted and secured using a mobile crane, followed by precise mounting of the underslung trolley and wire rope hoist. The crane then passed both 100% and 125% load tests.

2. Commissioning Results

The crane has undergone multiple tests and been successfully used since delivery. Following extensive use, the customer observed that the crane we provided functions with remarkable steadiness and accuracy when compared to the prior equipment. It has shown reliable performance even while operating continuously, with no electrical or mechanical malfunctions. The commissioning process confirmed the lifting precision of the system, surpassing the client's demand of ±25 mm with a positioning accuracy of ±20 mm at slow speed. In comparison to the client's outdated chain hoists, the smooth operation made possible by sophisticated soft-start and soft-stop controls decreased load swing by 60%, leading to safer and more effective material handling. During an unbroken 8-hour endurance test, the crane also demonstrated exceptional dependability, exhibiting no symptoms of fault tripping, overheating, or unusual vibration.

Performance in Real Production Tasks

The full value of an overhead crane may be seen in everyday production operations where speed, precision, and safety have a direct impact on throughput and personnel costs. In addition to precast concrete plants, 5 Ton HD bridge cranes are suitable for the following applications.

1. General Workshop Material Handling

Cranes in factories transport raw materials and semi-finished items along production lines. Operators use it to raise steel plates, tubing, and prefabricated assembly. The precise positioning characteristics allow for speedy and safe part placement. This configuration eliminates manual labor and accelerates cycle times.

2. Warehouse Loading and Unloading

In warehousing, the crane transports palletized items and huge crates. It travels the entire length of the bay to access trucks and storage racks. The pendant or remote control allows operators to place goods without leaving their cab. Consistent line speed and anti-sway functions enhance placement accuracy.

3. Automotive Assembly Plants

On automotive lines, cranes lift engines, transmissions, and welded sub-assemblies. Dual-hoist arrangements can accommodate long components, such as chassis rails. Slow-speed mode ensures accurate alignment during installation. The HD model's low headroom conserves ceiling space in tall assembly cells.

4. Metal Processing and Fabrication

In steel mills and fabrication yards, cranes transport massive plate bundles and machined pieces. The high-capacity drum and strong reel construction can withstand continuous shifts. Overload prevention prevents lifts from exceeding their rated load. This helps to safeguard tooling and save downtime.

5. Power Generation Equipment Handling

The crane is used in power plants and substations to lift transformers, turbines, and generator rotors. The exact positioning capability enables workers to align shafts and housings. The IP54-rated motor protection can tolerate dusty and humid situations near boilers and switchgear.

6. Waste‑to‑Energy and Biomass Plants

In waste-to-energy facilities, cranes raise feedstock hoppers and ash skips. Corrosion-resistant paint and sealed brakes withstand humid, dusty conditions. The electric anti-sway technology ensures loads remain stable while transmission to grinders or conveyors. Remote control enables operators to avoid residual dust.

7. Container Handling and Logistics

In small container yards, cranes lift freight containers or huge bins. Its span can be adjusted to accommodate rail widths or street clearances. High-duty components can withstand extended shifts of recurrent loading. Advanced PLC monitoring provides real-time status on use and maintenance needs.

Each application benefits from the HD model's reduced overall height, lighter weight, and reliable safety features. When specifying your crane, consider span length, control method, and environment‑specific coatings to match your site requirements.

Related Products

HD Single Girder Overhead Cranes

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NR Type Electric Wire Rope Hoist

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Conclusion

Yuanta's 5-ton HD single girder overhead crane is equipped with a European wire rope hoist, allowing its production to run in a safer, more efficient manner. We offer customized designs to meet the complex material handling needs of our clients. Beyond concrete production, similar 5t HD bridge cranes apply to steel fabrication, automotive assembly, warehousing, ports, and power plant workshops. For any operation requiring reliable, precise, and durable overhead lifting, Yuantai offers proven crane designs that deliver long‑term value and productivity gains.