- Mar 06, 2026
- News
Yuantai Customized Bridge Cranes
Discover Yuantai's customized bridge cranes, designed for efficiency in industrial applications. Improve your operations with solutions tailored to your lifting needs. Explore our offerings today.
Yuantai Crane Co., Ltd. is a Chinese crane and hoist manufacturer with decades of experience designing and building industrial lifting equipment. Its product range includes single-girder and double-girder overhead (bridge) cranes, fully customized to meet each facility's requirements. Typical lifting capacities span from a few tons up to several hundred tons: for example, Yuantai offers single-girder cranes from 1–32ton and double-girder cranes from 5–550ton. All designs comply with international standards (FEM, ISO, etc.) and carry ISO9001/CE certifications. Key specifications – such as span, lift height, and service class – are tailored to the customer's environment and application.
Types of Overhead (Bridge) Cranes
Bridge cranes are broadly categorized by their structural design and installation method. Yuantai's lineup includes the common single-girder and double-girder bridge cranes, as well as underhung (under-running) cranes and special configurations. Single-girder cranes have one main beam (girder) carrying the hoist, while double-girder cranes use two girders for the hoist and trolley. The choice affects capacity, span, and hook height.
1. Single-Girder Overhead Cranes
Single-girder overhead cranes use a single bridge beam supported at each end by end trucks that run on runway rails. They are typically fitted with an underhung trolley and hoist, which moves on the bottom flange of the girder. Yuantai's single-girder cranes are compact and cost-efficient for light-to-medium duty. Because they use less steel and require lighter runway structures, single-girder cranes have lower installation cost and weight. They are ideal where headroom or floor space is limited. For example, Yuantai's models include electric-hoist single-girder cranes with capacities from 1 to 20ton, and light-duty "HD" single-girder cranes (1–20ton) built to European FEM standards. The LDP series (low-headroom design) also uses a single girder for applications with restricted height. For facilities with limited headroom or intermittent low loads, Yuantai offers underhung (also called under-running) bridge cranes. In this configuration, the crane is supported entirely from a runway attached to the ceiling or roof trusses. The bridge (one or two girders) and hoist are suspended below the runway beams. Single-girder cranes generally have a practical limit around 1–20ton capacity.
2. Double-Girder Overhead Cranes
Double-girder overhead cranes use two strong bridge beams supported by end trucks, with the hoist and trolley running on rails mounted on top of the girders. This design provides greater strength, better stability, and higher lifting height than a single-girder crane because the hoist sits above the bridge rather than below it. Yuantai double-girder cranes cover a wide capacity range from 5 tons up to 550 tons, making them suitable for heavy loads and long spans. Different configurations are available for specific industries, including general-purpose bridge cranes, coil-handling cranes, ladle cranes for steel mills, electromagnetic plate cranes, and grab bucket cranes. For example, the Yuantai QDX double-girder crane designed under FEM standards can handle loads from 5 to 100 tons with spans from 7.5 to 31.5 meters. These cranes are built for demanding environments where lifting is frequent and heavy loads are common. They are widely used in steel plants, foundries, shipyards, ports, and large manufacturing facilities. While double-girder cranes offer higher capacity and durability, they are heavier and more expensive than single-girder models. They also require stronger runway beams or support columns due to their greater structural weight. For this reason, Yuantai engineers usually recommend them when lifting capacity exceeds about 15–20 tons or when the span is longer than about 20 meters. For lighter applications, a single-girder crane may be a more economical choice.
Crane Solutions by Environment
A key strength of Yuantai's offerings is adapting crane design to the operating environment. Overhead cranes must often function in challenging conditions, so Yuantai provides modifications for outdoor use, corrosive atmospheres, high temperatures, explosion hazards, and even cleanrooms. Each category of environment has specific requirements to ensure safety and reliability.
- Standard Indoor (Factory/Warehouse): For normal indoor facilities, standard protective paint (often a durable enamel or epoxy) suffices, and electrical components are rated for typical workshops (e.g. IP54 or IP55 protection). Yuantai's indoor cranes come with enclosed cabs or cabless controls, and use energy-efficient motors and hoists for smooth operation. For example, their standard single-girder electric hoist cranes (1–20t) are widely used in factories, warehouses, stockyards and the like, with spans up to 31.5m. These cranes meet IEC/ISO safety norms (like limit switches, overload protection, and warning alarms) appropriate for controlled indoor use.
- Outdoor (All-Weather) Cranes: Cranes operating outdoors face rain, wind, UV exposure and thermal cycling. Yuantai equips outdoor cranes with high Ingress Protection (IP) rated components – commonly IP55, IP65 or even IP67 for harsh weather. For example, IP55 means the crane is protected against dust and low-pressure water jets from any direction. Motors and control panels are often weatherproofed (e.g. with sealed bearings and silicone rubber gaskets). The steel structure is coated with corrosion-resistant finishes. Yuantai complies with this by using thicker-walled girders and rust-inhibiting multilayer paints (such as zinc-rich primers and polyurethane topcoats) for its outdoor models.
- Corrosive/Chemical Environments: Facilities like chemical plants, saltwater ports, or waste treatment may contain caustic fumes and moisture that corrode steel. To protect equipment, Yuantai offers specialized coatings and materials. Typical solutions include high-build epoxy primers, polyurethane topcoats, or even galvanization (zinc-aluminum) on steel parts. For critical components (hooks, trolleys, wheels), non-sparking alloys like stainless steel, bronze or copper-plating can be used. Likewise, Yuantai can supply stainless steel wire ropes and fully-enclosed cable trays to prevent corrosion. In some cases, heat-resistant or chemical-resistant paints are applied. The goal is to meet or exceed standards like ISO 12944 for corrosion protection, ensuring long service life even in aggressive atmospheres.
- High-Temperature Environments: Foundries, steel mills, and glass plants involve elevated ambient heat and occasional splashes of molten material. Overhead cranes in these settings incorporate heat-resistant designs. For instance, Yuantai's ladle cranes (for molten-metal handling) use heat shields and refractory linings on critical parts. Motors and electricals are located away from direct heat or fitted with thermal barriers. High-temperature cabling and insulation (rated for 180°C or more) are standard. Yuantai's high-temperature cranes may also incorporate water-cooled brakes and fans, and their duty class (e.g. ISO class A4/A5) is chosen to account for the heat-induced stresses.
- Explosion-Proof (Hazardous) Areas: In atmospheres with flammable gases, vapors or dust, cranes must be explosion-proof. Yuantai offers explosion-proof single-girder and double-girder cranes conforming to relevant standards. All motors, electrical boxes and wiring are flameproof (flame-containment construction "Ex d" according to GB3836.2 or IECEx) so that any ignition remains contained. For example, their QB series explosion-proof double-girder cranes meet Chinese standard GB3836.2‑2000 for flameproof enclosures and JB/T5897‑1991 for explosion-proof bridge cranes. These cranes carry markings like Exd II BT4 or CT4, indicating they are safe for Class IIB/IIC gas atmospheres. Operating temperature is managed to class T4 (≤135°C). Yuantai explosion-proof cranes are typically rated for service class A3–A5 (heavy service). Such cranes are essential in petrochemical plants, oil terminals, or painting operations.
- Cleanroom and Controlled Environments: In semiconductor, pharmaceutical or electronics manufacturing, overhead cranes must minimize contamination. These specialized cranes use smooth, sealed components and often stainless steel construction. Bearings and gears are sealed and pre-lubricated to reduce particulate emission. Yuantai can supply cleanroom cranes that comply with ISO 14644 classifications (by design, not by air filtration). For instance, they may use powder-coated or stainless-painted surfaces and fully enclosed hoists. Cleanroom cranes often feature anti-static coatings. The result is a crane system that moves materials efficiently while keeping dust and pollutants to a minimum.
Across all environments, Yuantai ensures compliance with safety and protection standards. For outdoor or damp conditions, electrical enclosures typically achieve at least IP54–IP66 protection. For corrosive atmospheres, multi-layer epoxy coatings and corrosion-resistant finishes are applied. In high heat, fire-resistant wiring and insulation prevent breakdown. In short, Yuantai tailors each crane with the engineering and materials needed for its intended operating environment.
Applications and Industry Uses
Overhead bridge cranes play an important role in many industries where heavy materials need to be lifted, moved, and positioned with accuracy. These cranes help companies improve workflow, reduce manual labor, and increase safety in daily operations. Because they travel along fixed runways above the work area, they free up floor space and allow workers to move heavy loads smoothly across large facilities. Yuantai’s bridge cranes are designed with flexibility in mind, so they can adapt to different production processes and working environments. From small manufacturing workshops to large industrial plants, these cranes help handle materials quickly and reliably. Their ability to lift, transport, and place heavy items with precise control makes them a valuable tool for companies that want to improve productivity and maintain safe working conditions.
1. General Manufacturing and Assembly
In general manufacturing and assembly facilities, overhead cranes help move parts and equipment between different production areas. Factories that produce machinery, vehicles, or industrial equipment often rely on cranes to handle components that are too heavy for manual lifting. For example, automotive plants frequently use bridge cranes to move engines, chassis parts, or large assemblies along production lines. These cranes allow workers to position parts accurately at each workstation, which improves efficiency and reduces the risk of damage. In many production halls, single-girder cranes with capacities between 1 and 20 tons are a popular choice because they provide smooth movement while fitting well in limited space. Larger manufacturing operations, such as forging or heavy machining shops, may use double-girder cranes to lift molds, dies, or large metal parts. With features like pendant control and variable-speed drives, operators can move loads slowly and precisely, which is especially helpful when assembling delicate or high-value equipment.
2. Logistics, Warehousing, and Container Handling
Logistics centers and warehouses also benefit from overhead cranes when handling heavy or bulky goods. In large storage facilities, cranes can span across wide aisles and move loads directly from receiving areas to storage locations. This helps reduce the need for forklifts when dealing with very heavy items. Bridge cranes can lift pallets, steel coils, large machinery parts, or packaged equipment and place them safely on racks or transport vehicles. For indoor logistics operations, overhead cranes and indoor gantry cranes help speed up loading and unloading tasks while keeping material flow organized throughout the facility.
3. Steel and Metallurgical Industry
Steel mills and metal processing plants place very high demands on crane systems. In these environments, cranes often work around heat, dust, and heavy loads throughout long production cycles. They may carry molten metal in ladles, transport steel slabs, move scrap metal, or handle finished coils. To meet these challenges, cranes used in the metallurgical industry must be strong, durable, and built for continuous operation. Yuantai provides heavy-duty overhead cranes designed specifically for steel production. Ladle cranes, for example, safely lift and transport containers of molten metal between furnaces and casting areas. Electromagnetic cranes move steel plates or scrap using powerful magnets, which allows fast loading and unloading without manual handling. These cranes usually include reinforced hooks, high-duty motors, and protective electrical systems that can operate in harsh industrial conditions. Reliable performance is critical because many steel production processes run continuously and depend on cranes for material movement.
4. Shipbuilding and Ports
Shipbuilding yards and port facilities often require some of the largest overhead cranes in the industrial world. These cranes lift massive components such as ship hull sections, engine blocks, and large steel structures. Because shipyard buildings and docks are extremely wide, cranes in this industry usually have very long spans and high lifting capacities. Double-girder bridge cranes are commonly used in indoor ship assembly halls, where they can move heavy blocks across the entire building. Yuantai designs high-capacity cranes that can handle loads ranging from several tons to hundreds of tons. In some shipyards, cranes use multiple hoists or tandem lifting systems to handle large sections safely. Special lifting tools, such as C-hooks or plate clamps, may also be installed to handle steel plates and coils. Since many of these cranes operate near seawater and harsh weather, strong corrosion protection and marine-grade coatings help ensure long service life in coastal environments.
5. Cleanroom, Pharmaceutical, and Electronics
Certain industries require extremely clean working conditions, especially in pharmaceutical manufacturing, electronics production, and precision laboratories. In these environments, even small particles can affect product quality or damage sensitive components. Overhead cranes designed for cleanroom use must prevent dust generation and limit contamination. Yuantai manufactures specialized cleanroom cranes with sealed motors, smooth surfaces, and carefully welded structures that reduce particle release. Many parts are enclosed or made from corrosion-resistant materials such as stainless steel. The hoist mechanisms may also use special lubricants that produce minimal vapor or residue. These features allow heavy equipment, production tools, or sensitive components to be moved safely without affecting the clean environment. By using overhead cranes instead of floor-based lifting equipment, companies can keep workspaces organized and maintain strict cleanliness standards.
6. Other Industries
Overhead bridge cranes are also widely used in many other industrial sectors where heavy materials must be handled regularly. In power generation plants, cranes help move large turbines, generators, and maintenance equipment during installation or repair work. In petrochemical facilities, they assist with lifting large reactors, tanks, and pipelines inside refineries or processing plants. Paper and forestry industries use cranes to handle heavy rolls of paper or raw timber products. Waste-to-energy plants rely on cranes to move and sort waste materials before processing. In each of these industries, cranes perform essential tasks such as lifting, transporting, loading, unloading, and accurately positioning large items. Compared with ground-based equipment like forklifts, overhead cranes often provide faster movement, better stability, and greater repeatability. This makes them an efficient solution for facilities that need reliable and safe material handling every day.
Design Standards and Customization
Yuantai bridge cranes are designed according to recognized international standards to ensure safety, reliability, and long service life. These standards help our engineers select the correct structural design and component sizes for each crane. We also follow OSHA requirements and ANSI B30.2 safety codes for overhead cranes, so every crane includes essential protections such as travel limit switches, end stops, overload protection, and clearly marked Safe Working Load labels. Each crane is built as a customized solution. Customers simply provide key information such as lifting capacity, span, lifting height, and expected operating frequency, and our engineers design the most suitable configuration. For demanding applications or continuous operation, we upgrade critical parts like wire ropes and bearings to higher durability classes according to ISO 4309 or DIN 15020 to extend fatigue life and improve reliability. Yuantai also uses modern electrical systems with energy-efficient inverters and PLC-based controls that meet CE requirements, ensuring smooth operation and lower power consumption. Our production follows ISO 9001:2015 quality management standards, and the factory also holds ISO 14001 environmental and ISO 45001 occupational safety certifications, every crane goes through strict design review, manufacturing inspection, and testing before delivery.
Key technical features that vary with application include:
- Bridge girder style: Rolled I-beams or box girders of steel (Q235/Q345) designed for minimal deflection, per FEM1.001 guidelines.
- Wheel/rail interface: Hardened wheel treads and rails, sized per CMAA load charts.
- Brakes and motors: Usually AC motors with Class F insulation and mechanical or electromagnetic brakes; explosion-proof versions use flameproof (Ex d) motors.
- Hoists and Trolleys: Wire rope or chain hoists (electric) made to FEM Class 2m–5m or ASME H2–H4 duty, depending on load spectrum.
- Controls: Pendant, wireless remote or cabin control, meeting OSHA/CENELEC standards for emergency stop and safety.
- Safety devices: Anti-collision, overload sensors, and as-needed load monitoring to conform with ANSI/CMAA or EN standards.
These design choices are all based on the intended use case. Yuantai's technical team conducts a feasibility study and provides detailed design drawings for approval.
Summary
Yuantai's customized bridge cranes cover a broad spectrum of lifting solutions. By varying the crane type (single vs. double girder, top-running vs. underhung), adapting to environmental factors (outdoor, high-temp, corrosive, explosive, cleanroom, etc.), and meeting the needs of different applications (manufacturing, logistics, steel, shipbuilding, etc.), Yuantai provides fully tailored crane systems. The designs comply with global standard and carry certifications like ISO 9001 and CE.
Comparison – Single vs. Double Girder
| Feature | Single Girder | Double Girder |
|---|---|---|
| Typical capacity range | ~0.5–15t | ~5–550t |
| Max recommended span | Up to ~20m | Unlimited (40m or more) |
| Hook approach | Better (trolley below bridge) | More limited (trolley on top of bridge) |
| Headroom usage | Fits low ceilings (hoist below beam) | Maximum lift height (hoist above beams) |
| Cost and weight | Lower (lighter structure) | Higher (more steel & supports) |
| Best for | Light/medium duty, limited space | Heavy-duty, long spans, high lift |
| Typical applications | Warehousing, light manufacturing | Steel, shipbuilding, large assembly |
