What Is a Spreader Beam?
A Complete Guide to Spreader Beams, How They Work, Common Applications & Industry Standards
A spreader beam is a below-the-hook lifting device used to distribute lifting forces across multiple lifting points. By transferring load through compression rather than bending, spreader beams provide a stable and efficient lifting solution for long, heavy or structurally sensitive loads.
Widely used throughout offshore wind, marine construction, ports, heavy engineering and infrastructure projects, spreader beams help improve load stability, control sling forces and reduce stress on the load during lifting operations.
This guide explains what a spreader beam is, how it works, the different types available, typical applications, design standards and key factors to consider when selecting a spreader beam for a lifting project.
How Does a Spreader Beam Work?
A spreader beam works by transferring lifting forces through the beam in compression, while bottom slings distribute the load across two or more lifting points.
The crane connection uses top slings to transfer lifting force into the spreader beam, creating a stable two-point lifting arrangement.
A spreader beam is primarily loaded in compression between the top sling connection points, helping reduce bending forces in the beam.
Bottom slings connect the beam to the load, spreading lifting forces across multiple points for improved stability, balance and control.
Why Use a Spreader Beam?
Spreader beams are used when a load needs to be lifted from two or more points, especially where stability, load control and even force distribution are important. They are commonly used for long loads, heavy fabricated structures, offshore equipment, marine components and loads that could distort if lifted from a single point.
The main purpose of a spreader beam is to keep lifting points apart and control how forces are transferred into the load. This makes spreader beams useful for lifting operations where the load geometry, centre of gravity, sling angle or available lifting points require a more controlled lifting arrangement.
Improved Load Stability
A spreader beam helps maintain balance by lifting the load from multiple points. This is especially important when handling long, wide or awkward loads where movement during the lift must be controlled.
Even Force Distribution
By spreading the lifting force across the beam and into separate lifting points, a spreader beam helps reduce concentrated loads and supports safer handling of structurally sensitive components.
Reduced Stress on the Load
Some loads are not designed to be lifted from one central point. A spreader beam allows lifting forces to be applied closer to the load’s designed lifting points, reducing the risk of distortion or damage.
Better Control of Sling Angles
Sling angle has a direct effect on lifting forces. A spreader beam can help create a more suitable rigging arrangement by increasing the distance between lifting points and reducing unwanted side loading on the load.
Suitable for Long or Flexible Loads
Spreader beams are often used for steelwork, pipe sections, frames, machinery, marine equipment and fabricated structures where single-point lifting would not provide enough stability.
Useful for Complex Lifting Operations
For heavy lifting, offshore lifting, construction and engineered lift plans, spreader beams provide a practical way to adapt the rigging arrangement to suit the load, crane hook position and available headroom.
A spreader beam is usually selected when a lifting operation requires multiple lifting points, improved load stability, controlled sling angles or reduced stress on the load. The final selection should always consider load weight, span, centre of gravity, headroom, sling angle and the required working load limit.
Types of Spreader Beams
The main types of spreader beams are fixed spreader beams, adjustable or telescopic spreader beams, and modular spreader beams. Specialist variations such as bespoke spreader beams, heavy lift spreader beams and offshore spreader beams are usually developed from one of these core configurations.
Fixed & Bespoke Spreader Beams
Fixed spreader beams are manufactured to a set span and are used where the lifting arrangement, load size and lifting point positions remain consistent. They are often selected for repetitive lifting operations or dedicated project lifts.
Bespoke spreader beams follow the same principle but are engineered around a specific load, capacity, centre of gravity, headroom restriction or site requirement.
- Permanent lifting span
- Suitable for dedicated lifting operations
- Can be custom designed for specific loads
Adjustable & Telescopic Spreader Beams
Adjustable spreader beams, often referred to as telescopic spreader beams, allow the span to be altered to suit different load widths, lifting point positions and rigging arrangements.
This makes them useful where one beam is required to support multiple lifting operations, reducing the need for several fixed spreader beams across different load sizes.
- Variable span adjustment
- Useful for different lifting point positions
- Can be designed as a bespoke adjustable lifting solution
Modular Spreader Beams
Modular spreader beams use interchangeable struts, end units and bolted connections to create multiple span and capacity configurations from a single system.
They are commonly used for heavy lifting, offshore lifting, construction projects and engineered lift plans where flexibility, transportability and multiple configurations are important.
- Interchangeable beam sections
- Multiple span and capacity options
- Suitable for heavy lift and offshore applications
Typical Applications of Spreader Beams
Spreader beams are used wherever a load needs to be lifted from multiple points while maintaining stability and controlling lifting forces. They are commonly used throughout offshore wind, marine operations, construction, heavy engineering and specialist lifting projects.
Offshore Wind
Used for lifting turbine components, monopiles, transition pieces, nacelles and other large offshore wind structures where stability and load control are critical.
Ports & Shipping
Used for handling cargo, marine equipment, vessel components and fabricated structures during loading, unloading and heavy lift operations.
Construction & Infrastructure
Used for lifting structural steelwork, bridge sections, precast concrete elements and large assemblies where forces need to be distributed across multiple lifting points.
Heavy Engineering
Used for lifting machinery, fabricated components, pressure vessels, transformers and industrial equipment where load stability is essential.
Although lifting requirements vary between industries, the objective is usually the same: distribute lifting forces safely across multiple lifting points, reduce stress on the load and improve control throughout the lifting operation.
Design Standards & Compliance
Spreader beams used in lifting operations should be designed, manufactured, tested and certified in accordance with recognised lifting equipment and structural design standards. These standards help ensure the equipment is suitable for its intended application and can be operated safely throughout its service life.
BS EN 13155
BS EN 13155 covers non-fixed load lifting attachments, including lifting beams, spreader beams and other below-the-hook lifting devices. It defines requirements for design, manufacture, testing and verification.
DNV-ST-0378
DNV-ST-0378 is widely used throughout offshore wind, marine and offshore industries. The standard provides requirements for offshore and platform lifting appliances operating in demanding environments.
Eurocode 3
Eurocode 3 provides structural design rules for steel structures and is commonly used when assessing strength, stability, compression, buckling resistance and overall structural performance.
Proof Load Testing & Certification
Following manufacture, spreader beams are typically proof load tested to verify structural integrity and confirm that the equipment performs as intended before entering service. Certification, traceability and inspection records form an important part of the lifting equipment lifecycle.
What Should Be Verified?
- Working Load Limit (WLL)
- Span and configuration
- Sling angle and load path
- Connection points and shackles
- Material traceability
- Proof load testing
- Certification and inspection records
Understanding Spreader Beam Capacity
Selecting a spreader beam involves more than matching the beam’s Working Load Limit to the weight of the load. Span, sling angle, lifting geometry, connection points and beam configuration can all affect the allowable capacity of the lifting arrangement.
As the span increases, the capacity of many spreader beam systems can reduce. Sling angle is also important because it affects the forces transferred through the top slings, beam and lifting points.
For this reason, spreader beam capacity should always be checked against certified load data before a lift is planned or carried out.
View Spreader Beam Capacity ChartSpreader Beam FAQs
Answers to common questions about spreader beams, capacity, certification and lifting applications.
What is a spreader beam used for?
A spreader beam is used to lift loads from multiple lifting points, helping distribute forces evenly and improve load stability during a lifting operation.
What is the difference between a spreader beam and a lifting beam?
A spreader beam is primarily loaded in compression and normally uses top slings, while a lifting beam is loaded in bending and typically connects directly to a central lifting point.
How is spreader beam capacity determined?
Capacity depends on factors such as span, sling angle, beam design, configuration and Working Load Limit. Capacity should always be verified using certified load data.
What standards apply to spreader beams?
Common standards include BS EN 13155, DNV-ST-0378 and Eurocode 3, depending on the application and operating environment.
Are spreader beams suitable for offshore lifting?
Yes. Many spreader beams are designed specifically for offshore applications and may be designed and certified in accordance with offshore standards such as DNV-ST-0378.
Can a spreader beam be custom designed?
Yes. Bespoke spreader beams can be engineered for specific loads, lifting arrangements, capacities and project requirements.
Do spreader beams require proof load testing?
Most spreader beams are proof load tested before entering service to verify structural integrity and demonstrate compliance with the relevant design requirements.