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A lifting crane spreader bar beam is a device used to lift and distribute heavy loads of weight evenly across multiple points. These beams are crucial in lifting operations as they prevent loads from swinging, twisting, or dropping, which can cause damage or injuries. Below are the types of lifting crane spreader bars:
Fixed Spreader Bars
Fixed spreader bars are the most common type of lifting crane beam. They are designed and constructed with a simple construction and have a less complex rigging arrangement. These spreader beams are lightweight and cost-effective, making them suitable for various lifting operations. A fixed spreader bar is most commonly used when the load has a uniform weight distribution and stability. They are widely used in construction sites and warehouses.
Telescopic Spreader Bars
Telescopic spreader beams are versatile and designed to have multiple extension sections. They can be adjusted to different sizes and dimensions to accommodate various loads of weight. These spreaders bars have a lightweight design and come with rigging hardware, which makes them suitable for many lifting applications. Telescopic spreader beams are commonly used in shipping yards to transport containers of different sizes.
Textile Spreader Bars
These are specialized lifting beams designed to handle delicate or irregularly shaped loads. They are constructed from high-strength synthetic materials, which offer lightweight and non-damaging support to the loads lifted. Textile spreader bars come with padded slings or straps that distribute the load weight evenly and minimize slippage. They are commonly used in the textile industry and when handling fiberglass or wind turbine blades.
Double or Multiple Spreader Bars
Double or multiple spreader bars are used for heavy lifting operations. They feature two or more points of lifting, which helps to distribute the load weight evenly. These spreaded bars increase the lifting capacity of cranes and are ideal for lifting heavy and large loads, such as precast concrete elements. They are designed with high-strength steel to ensure stability and rigidity when lifting.
Magnetic and Vacuum Spreader Bars
These spreader beams are specialized and have lifting attachments, such as magnets or vacuum systems. The magnetic spreader bars are suitable for lifting ferrous metal sheets, while the vacuum spreader bars use suction cups to lift non-porous materials like glass plates. They are used in manufacturing industries for the efficient and safe transportation of sheet metals and glass panes.
Lifting beams and spreader bars have different features that affect how the load is lifted and distributed. Here are some of the features and functions of the lifting crane spreader bars and beams:
Function: Load Distribution
The primary function of a lifting beam and spreader bar is to distribute the load evenly across all points. This is especially important for lifting long or awkwardly shaped items, such as steel beams or pipes. By distributing the weight evenly, these tools reduce the risk of the load tipping or falling, ensuring a safer lift.
Feature: Rigidity
Lifting beams and spreader bars are constructed with high-strength materials such as steel or aluminum. This ensures that they can withstand the stresses and strains of heavy lifting without bending or twisting. The rigidity of these tools is crucial for maintaining load stability and safety during lifting operations.
Feature: Load Shackles
Load shackles are critical components of lifting beams and spreader bars. They connect the lifting device to the load, bearing the entire weight of the lifted item. High-quality load shackles are essential for safety, with the capacity to withstand the maximum load without failure.
Feature: Multiple Lifting Points
Spreader bars often have multiple lifting points along their length. This feature allows for the attachment of multiple slings, evenly distributing the load across the bar or beam. As a result, the load is lifted more stably and safely.
Feature: Adjustable Arms
Some spreader bars come with adjustable arms. This feature allows the equipment to adapt to different loads and lift angles. As a result, it increases the versatility of the lifting equipment, making it suitable for various lifting tasks.
Feature: Safety Swivels
Safety swivels are integral to the lifting process, allowing the load to rotate 360 degrees smoothly. This feature is important when precise positioning is required, reducing the risk of sling torsion and improving the maneuverability of the lifted load.
Feature: Powder Coating
A common feature of cranes and lifting devices is powder coating. The powder coating is a protective layer that prevents rust and corrosion. It ensures the equipment remains durable and functional, offering long service.
Spreader bars are used in a variety of industries to lift and move large, heavy, or unwieldy loads. The lifting equipment distributes the weight of the load more evenly across the lifting cables or chains, reducing the risk of damage and improving stability during the lift. Here are some common application scenarios.
Construction Sites
Spreader bars are commonly used at construction sites to lift and position large beams, precast concrete slabs, heavy roofing materials, and oversized containers. They help in the safe and efficient placement of heavy loads in construction projects.
Shipping Ports and Cargo Terminals
These bars are used in cargo handling at shipping ports to lift and move shipping containers and other large cargo. The spreader bars enhance the stability and safety of lifting containers from ships to trucks or trains and vice versa.
Steel Mills and Fabrication Facilities
Lifting beams are employed to handle large steel plates, beams, girders, and other structural components in steel mills and fabrication shops. They ensure safe and efficient movement of materials during the manufacturing process.
Oil and Gas Industry
Spreader bars are utilized in offshore drilling platforms and oilfield operations to lift and position heavy equipment, pipelines, and drilling components. They are crucial in handling large and bulky loads in marine and offshore environments.
Wind Energy Projects
These bars are used to lift and assemble large components of wind turbines, including rotor blades and nacelles. The spreader bars are essential in constructing and maintaining wind energy facilities.
Utilities and Electrical Companies
Utility companies use spreader bars to lift and place heavy power lines, poles, transformers, and other electrical equipment during installation and maintenance operations.
Heavy Machinery and Equipment Manufacturers
Manufacturers of heavy machinery and equipment often use spreader bars to move large components, such as engines, chassis, and other parts during the production process.
Mining Industry
In the mining sector, spreader bars are used to lift and transport heavy equipment, such as excavators, bulldozers, and drilling machines, as well as large ore bundles.
When choosing a lifting crane spreader bar beam, consider the following factors:
Load capacity and weight
The primary consideration when choosing a spreader bar beam for a crane lift is ensuring that it can handle the load's weight. Look at the load's weight and choose a spreader beam that can carry more weight than the load to be lifted. This ensures safety and prevents accidents.
Quality and material
The lifting crane spreader bar beam material directly affects its strength. Look for a spreader beam made with high-quality steel or aluminum. Steel is preferred because it is strong and durable. Also, the design of the spreader bar should be capable of carrying out the intended lifting operations.
Length and size
Compatibility
It is important to ensure that the spreader bar beam is compatible with the lifting crane. Check the lifting hooks and crane connection points to ensure they will work together without any issues.
Adjustability
Some lifting crane spreader bars have adjustable beams. Consider choosing a bar with adjustable beams, as this type of spreader beam is versatile. It can be used to lift different loads and can be adjusted to accommodate various widths and lifting angles.
Safety features
Safety should be the number one priority when lifting heavy loads with a crane. Look for lifting crane spreader bars that have safety features. Some of the safety features to look for include; safety hooks, load indicators, and anti-rotation devices.
Q1: What are the weight limitations of a spreader beam?
A1: There are no specific limitations on the weight of the load that a spreader beam can carry. ACBL 2023, an online source, states that these beams can lift and distribute weights ranging from 10,000 pounds to more than 1 million pounds. The weight distribution will depend on the size and construction material of the spreader beam.
Q2: How is the lifting beam maintained?
A2: The spreader beam's maintenance involves regular inspection and cleaning to remove debris and corrosive elements. Tightening loose parts, lubrication, and professional inspection should be done periodically to ensure the spreader beam is in good condition and safe for use.
Q3: Are there any alternatives to lifting beams?
A3: There are no specific alternative tools for lifting heavy items. However, other rigging equipment used for lifting and distributing weight include gantry cranes, lifting eyes, shackles, chain hoists, web slings, and synthetic slings.
Q4: Can one build a homemade lifting beam?
A4: It is not advisable to create a homemade lifting beam because of the risks involved. One must have expert knowledge and understanding of the required materials, engineering, and safety regulations needed to construct a quality and safe lifting beam. Cranes and other heavy lifting equipment require your entire attention when lifting and transporting because of their risks. Therefore, a homemade beam would be unsafe and risk damaging the equipment or injury to the person.
Q5: What industries use spreader beams?
A5: Several industries use spreader beams to lift and transport items. These include construction, shipping and ports, renewable energy, manufacturing, mining, offshore oil and gas, and heavy machinery industries.