Overhead Crane Specifications

Overhead Cranes Provided by Yuantai

Here we mainly introduce the specifications of the bridge crane, so that customers can find the crane model suitable for their working conditions. Use this article to get an overview of our overhead cranes, then contact us by phone or by email with your specific requirements. After receiving your inquiry, our company's professional sales managers and engineers will provide you with professional services.

The bridge crane is a lifting device that is horizontally placed over the workshop, warehouse and stockyard for material lifting. Because its two ends are located on tall concrete pillars or metal supports, it is shaped like a bridge. The bridge frame of the bridge crane runs longitudinally along the tracks laid on the elevated sides on both sides, which can make full use of the space under the bridge frame to lift materials without being hindered by ground equipment. It is a kind of hoisting machinery with the widest range and the largest number. Overhead cranes are used to lift and move heavy loads in industrial settings, such as factories, warehouses, and construction sites. The specifications of an overhead crane can vary based on the specific application, load requirements, and operating environment. Here are some common specifications to consider when designing or selecting an overhead crane.

Overhead Crane Lifting Capacity G

The lifting capacity of a bridge crane depends on several factors, including its design, specifications, and the materials it's built with. Bridge cranes, also known as overhead cranes or gantry cranes, are used to lift and move heavy loads within industrial settings such as warehouses, factories, construction sites, and shipyards. The lifting capacity of a bridge crane is typically determined by its manufacturer and is specified in terms of the maximum weight it can safely lift.
Lifting capacity is influenced by the following factors:

1. Crane Type and Design: Different types of bridge cranes, such as single-girder cranes and double-girder cranes, have varying lifting capacities. Double girder cranes are generally capable of lifting heavier loads compared to single girder cranes.
2. Span Length: The distance between the two runway beams of the crane affects its lifting capacity. A longer span might require a larger crane with a higher lifting capacity to maintain safety and stability.
3. Hoist and Trolley Configuration: The hoist and trolley system is responsible for lifting and moving the load horizontally. The type of hoist (wire rope or chain) and the trolley mechanism (single speed, dual speed, variable frequency drive, etc.) can impact the crane's lifting capacity.
4. Lifting Speed: The speed at which the hoist can lift the load can influence the crane's overall lifting capacity. Faster lifting speeds might reduce the maximum weight the crane can safely handle.
5. Structural Strength: The structural integrity of the crane, including the quality of materials used and the design of key components, determines its overall lifting capacity. A stronger crane can handle heavier loads.
6. Safety Factors: Manufacturers include safety factors in their lifting capacity calculations to ensure that the crane can handle unexpected loads or dynamic forces without compromising safety.

Overhead Crane Span S

The span of an overhead crane refers to the horizontal distance between the two parallel runways or rails on which the crane travels. It is a critical factor in determining the crane's reach and its ability to cover a specific area within a facility. The span is typically measured from the center of one runway rail to the center of the opposite rail.

The span of an overhead crane can vary widely depending on the specific requirements of the application and the layout of the facility. Here are some key points to consider regarding the span of an overhead crane:

1. Span Length: The span length is determined by the distance between the two runway rails. It is an essential specification when selecting an overhead crane because it defines the crane's coverage area. Common span lengths for overhead cranes can range from a few meters to over 100 meters, depending on the needs of the facility.
2. Load Coverage: The span of the crane should be chosen to ensure that it can cover the entire work area and reach the locations where lifting and material handling tasks are required. A longer span allows the crane to cover a larger area.
3. Building Structure: The available space and structural support within the facility will also influence the maximum span length of the crane. The building must be designed to accommodate the crane's span, and suitable support structures (such as columns or support beams) may be necessary to carry the load.
4. Lifting Capacity: The lifting capacity of the crane can be affected by the span length. Longer spans may require cranes with a higher lifting capacity to maintain safety and stability.
5. Operational Requirements: The specific tasks and materials being handled by the crane will also impact the choice of span length. Some applications may require a flexible crane system with a shorter span, while others may benefit from a longer span for increased coverage.

Bridge Crane Lifting Height H

The lifting height of a bridge crane, also known as the vertical lifting distance or hook height, refers to the maximum distance from the floor to which the crane's hoist can raise a load. This parameter is an essential factor when designing or selecting a bridge crane for a specific application because it determines whether the crane can handle the lifting tasks required within a given facility.

Several factors influence the lifting height of a bridge crane:

1. Crane Type: Different types of bridge cranes, such as single-girder and double-girder cranes, may have varying lifting heights. Double girder cranes generally have greater lifting heights compared to single girder cranes due to their design and structural capabilities.
2. Hoist Configuration: The type of hoist used on the crane, including the length of the wire rope or chain, affects the maximum lifting height. Some cranes may have multiple hoist options with different lifting heights.
3. Building Height: The height of the building or facility in which the bridge crane is installed sets a practical limit on the crane's lifting height. The crane's hook height should not exceed the available vertical space within the building.
4. Support Structures: The crane's runway and support structures, such as columns or beams, must be designed to accommodate the required lifting height. The structural integrity of these components is crucial for safety and performance.
5. Load Weight: The weight of the load being lifted can affect the crane's lifting height. Heavier loads may require a crane with a lower lifting height to maintain stability and safety.
6. Safety Factors: Manufacturers typically include safety factors in their lifting height calculations to ensure that the crane can handle unexpected loads or dynamic forces without compromising safety.
7. Environmental Considerations: Environmental factors, such as wind conditions or temperature variations, can also impact the crane's lifting height. Special considerations may be necessary for cranes operating outdoors or in harsh environments.

Overhead Crane Operating Speed

The operating speed of an overhead crane refers to how fast the crane can perform various movements, including lifting, lowering, trolley travel (horizontal movement), and bridge travel (longitudinal movement along the runway). These speeds are essential considerations when designing, selecting, or operating an overhead crane system. Operating speeds are typically specified in feet per minute (fpm) or meters per minute (m/min), and they can vary depending on the specific application and crane design. Here are the primary operating speeds of an overhead crane:

1. Lifting Speed: Lifting speed refers to how quickly the crane's hoist can raise or lower the load. It is an essential factor in determining the crane's efficiency and productivity. Lifting speeds can vary widely, with options for single-speed and variable-speed hoists. The appropriate lifting speed depends on the weight of the load and the required precision during lifting and lowering operations. Slower speeds are often used for more delicate or precise operations, while faster speeds are suitable for quickly moving heavy loads.
2. Trolley Travel Speed: Trolley travel speed pertains to how fast the trolley (the horizontal mechanism carrying the hoist) moves along the bridge girder. The speed is adjustable and can be tailored to the specific needs of the application. Faster trolley speeds can improve efficiency in moving loads horizontally within the workspace.
3. Bridge Travel Speed: Bridge travel speed refers to the rate at which the entire crane moves horizontally along the runway rails. Similar to trolley travel speed, it can be adjusted to accommodate the workflow and operational requirements within the facility. Faster bridge travel speeds enable the crane to cover larger distances more quickly.

Bridge Cranes Working Class

Bridge cranes are classified based on several factors that reflect their capacity and usage characteristics. These classifications help in selecting the right crane for specific applications. The classifications you mentioned are typically used to describe the working class of a bridge crane:

Crane Use Level (U0~U9): The crane use level, often denoted as U, reflects the degree of busyness or utilization of the crane over time. It is a measure of how frequently the crane is used for lifting and material handling tasks. The U rating ranges from U0 (infrequent use) to U9 (continuous use). Here's a breakdown of the U ratings:

Crane Load Status Level (Light - Medium - Heavy - Special): This classification refers to the load-carrying capacity of the crane and is based on the lifting weight. The load status levels include:

Crane Working Class (A1~A8): The crane working class, often denoted as A, provides information about the duty cycle and the expected operational conditions of the crane. The working class is important for determining the crane's design and durability. The A ratings range from A1 (very light duty) to A8 (severe heavy duty). Here's a breakdown of the A ratings:

Selecting the appropriate bridge crane for a specific application involves considering all these factors to ensure that the crane can handle the required loads and usage patterns safely and efficiently. Matching the crane's working class, load capacity, and use level to the operational demands is crucial for optimal performance and longevity. Consulting with crane manufacturers or specialists can help determine the best crane for your needs.

Why Custom a Crane Solution?

At Yuantai, we know that there is no "one size fits all" in the lifting field. Universal cranes are suitable for general factories, warehouses, etc. Besides, different applications have different needs for cranes. For example, steel industries often lift steel plates, so need electromagnetic cranes. Ports and docks often need to load ore, gravel, and other bulk goods, so need to grab bucket cranes. Chemical dangerous places often need to carry flammable and explosive materials, so need explosion proof cranes.

So, we provide customized cranes according to the special needs of our customers. Custom crane solutions offer many benefits in a variety of applications：

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