How to Tie a Webbing Sling Safely and Extend Its Lifespan

In the world of modern industry, efficiency and safety are no longer optional—they are mandatory. Every lifting process—whether in construction or manufacturing—depends on one crucial factor: how the load is tied and lifted correctly. This is where the role of the webbing sling becomes essential. Although it may look simple, even small mistakes in tying can turn a routine operation into a major risk for workers and equipment.

Many lifting failures occur not because of poor sling quality, but due to incorrect tying techniques. Improper lifting angles, the wrong method, or insufficient inspection are often the main causes. As a result, loads may slip, slings may break, and fatal accidents can occur.

Through this guide, we will discuss step-by-step how to tie a webbing sling correctly, the main rigging techniques, and how to maintain and inspect slings so they remain safe to use. With the right understanding, every operator can maintain workplace safety while significantly extending the lifespan of the sling.

The Importance of Proper Webbing Sling Tying

Mistakes in tying are often underestimated, even though the consequences can be severe. Incorrect tying not only reduces the sling’s lifting capacity but also creates uneven pressure that causes fibers to wear out quickly. According to data from the European Agency for Safety and Health at Work (EU-OSHA), 1 out of 4 lifting accidents is caused by incorrect rigging methods, including improper tying.

Beyond safety, proper tying also has a direct impact on work efficiency. A properly installed sling allows operators to control the load’s direction and balance more easily. This speeds up work time, reduces the need for additional lifting tools, and lowers maintenance costs for lifting equipment.

In other words, understanding the correct tying technique is not just about compliance—it is an investment in safety, productivity, and equipment longevity. Every detail—from sling positioning to lifting angle—plays an important role in determining the outcome of the lift.

Preparation Before Tying a Webbing Sling

Before the tying process begins, there are several crucial steps often overlooked by field operators. Yet, preparation is the most important determinant of lifting success. Preparation is not only about checking the sling’s condition but also ensuring the load, tools, and working environment are all safe.

Many mistakes happen during this phase: slings are used while damp or dirty, the tying point does not align with the load’s center of gravity, or operators forget to check for sharp edges that can cut sling fibers. These errors may seem minor but can cause lifting failure even before the load leaves the ground.

By following the steps below, these risks can be significantly minimized.

1. Inspect the Webbing Sling

The first step is a full inspection of the sling’s physical condition. Ensure there are no loose stitches, thinning fibers, or extreme discoloration caused by UV exposure or excessive heat. A sling that becomes stiff, hardened, or discolored typically has lost some elasticity and should no longer be used.

Also check the identification tag containing the Working Load Limit (WLL), length, and production standard (e.g., EN 1492 or ASME B30.9). If the tag is missing or unreadable, the sling is automatically considered unfit for use. Record inspection results in a logbook, especially for slings used in major projects to track usage history.

2. Inspect the Load

Every load has different characteristics—weight, shape, and center of gravity. A common mistake is estimating load weight without accurate calculation. If the load exceeds the sling’s capacity, lifting failure can occur instantly.

Also ensure the load does not have sharp or rough surfaces that could cut the fibers. Use edge protectors where needed. For unbalanced loads, use two or more slings to distribute pressure evenly.

3. Choose the Right Tying Technique

The tying method depends on the load’s shape and weight. One of the biggest mistakes is using the same method for all situations. For example, long loads should use a basket hitch with two contact points rather than a single vertical hitch, which risks causing rotation.

Experienced operators usually calculate the working angle before selecting the technique. Angles smaller than 45° exponentially increase the load on the sling. Therefore, understanding lifting geometry is essential for safe and efficient operations.

Tying Techniques for Webbing Slings

This section is the core of the entire process. There are three main tying techniques used in the industry: Choke Hitch, Basket Hitch, and Vertical Hitch. Each has different application methods, effective capacity, and risks.

To achieve the best results, it is important to understand when each technique should be used, how to tie it correctly, and common mistakes to avoid.

1. Choke Hitch

This method is most commonly used to lift cylindrical items such as pipes or drums. The sling is wrapped around the load, and one end is passed through the other end’s loop to form a choke. As the load is lifted, the loop tightens and grips the load.

Its main advantage is preventing the load from shifting during lifting. However, a choke that is too tight can increase local pressure on the fibers and reduce sling strength by 25-40%. Therefore, using additional protection on the choke area is recommended, especially if the load has edges or rough surfaces.

A common mistake is tightening the sling too strongly before lifting, causing fiber compression even before the load moves. This accelerates damage. Ensure the choke is snug enough for stability but not overly tight.

2. Basket Hitch

Basket hitch is used when the load needs to be supported from below with both sling legs forming a “basket.” Both ends are attached to the crane hook while the load sits in the center.

Its advantage is even load distribution along the sling. Because the load is carried by two legs, its effective capacity can be up to double compared to vertical hitch—but only if the angle between the two legs is kept below 60°. If the angle exceeds this, the effective capacity drops sharply.

For long or wide loads, ensure both connection points are equidistant from the center of gravity to prevent tilting. In some cases, a spreader bar is used to maintain stable angles and prevent excessive friction on the hook.

3. Vertical Hitch

This is the simplest and fastest method. The sling is attached directly from the crane hook to the lifting point of the load vertically. It is suitable for symmetrical loads such as concrete blocks or machines with a top lifting point.

Although simple, this method demands high accuracy in aligning the hook with the center of gravity. If off-center, the load can rotate or shift during lifting. Always begin lifting slowly to allow the load to stabilize before fully lifting.

Vertical hitch is often used together with a tagline so operators can control load sway.

Comparison Table of Webbing Sling Tying Techniques

Safety Tips for Webbing Sling Tying

Workplace safety must never be compromised. Even if the sling passes inspection and the correct technique is chosen, many other factors can still cause accidents. Human error is the main cause, especially when operators lack understanding of basic lifting principles.

1. Do Not Exceed Load Capacity

Every sling has a factory-tested Working Load Limit (WLL). Exceeding this limit invites failure. Capacity is also affected by angle and tying method. For example, at a 30° angle, the effective load increases by 15%, meaning the sling works harder than it appears.

Use this simple formula:

Effective Load = WLL / cos(lifting angle)

This helps operators estimate actual forces on the sling and avoid overloading.

2. Avoid Sharp Edges

Sharp edges are the biggest enemy of webbing slings. Friction against steel edges can cut fibers like a knife. Use corner protectors or rubber padding at contact areas. Many manufacturers offer protective sleeves that resist abrasion and chemicals.

As a rule of thumb:

If the sling passes over an edge with a radius less than 2× the sling’s thickness, edge protection is mandatory.

3. Check Sling Placement

Before lifting begins, ensure all sling legs and hooks are aligned and not twisted. A twisted sling creates uneven tension and may rotate during lifting.

Perform a pre-lift test 10-15 cm off the ground to verify balance and stability before proceeding.

4. Use Protective Equipment

Operator safety is as important as equipment safety. Use helmets, gloves, and safety shoes when working with slings. Ensure hooks, shackles, and fittings are undamaged. Avoid uncertified or modified lifting tools.

5. Training and Certification

Operators must understand not only how to tie slings but also basic principles of force and gravity. Rigging training and certification are mandatory to ensure all procedures follow international standards.

Certified workers are 60% less likely to make tying mistakes compared to untrained operators. Thus, investing in training is one of the most effective accident-prevention strategies.

How to Maintain Webbing Slings

Maintaining a sling is not only about cleanliness, but also performance and safety. A well-maintained sling can last 2–3 times longer than one used without care.

Maintenance includes routine cleaning, proper storage, periodic inspection, and emergency handling if exposed to chemicals or extreme heat.

1. Clean Routinely

After use, clean the sling from dust, mud, oil, or chemicals using water and mild soap. Do not use organic solvents or abrasive substances. Use a soft-bristle brush to remove dirt trapped in the weave.

Dry the sling in a shaded, ventilated area. Direct sunlight accelerates UV degradation of synthetic fibers. If the sling is wet, do not use it until fully dry to avoid slippage during tying.

2. Store Properly

A sling stored carelessly wears out faster than one frequently used. Store slings in a dry place with stable room temperature, away from chemicals, heat, or sharp metal.

Use smooth hanging racks or loosely roll the sling without sharp folds. Avoid hanging slings on nails or steel wires that may damage fibers from within.

3. Routine Inspections

Create an inspection schedule: daily for visual checks, monthly for detailed inspections. Examine the sling’s center area, reinforced stitching at the ends, and signs of aging such as discoloration or stiffness.

Record inspection results in a logbook to track lifespan and usage history. If more than 10% damage is found across the sling width, replace it immediately.

4. Avoid Overloading and Extreme Environments

Exposure to temperatures above 90°C, corrosive chemicals, or continuous UV exposure accelerates degradation. Use coated slings if operating outdoors or in heavy industrial environments.

If the sling has experienced overload or shock load, remove it from service and retest before reuse.

Understanding Webbing Sling Load Capacity

Every sling has a limit known as the Working Load Limit. However, actual capacity can differ due to angle, tying method, and environmental conditions.

For safety, use a minimum safety factor of 5:1—meaning the sling must withstand five times the nominal load before failing.

Professional operators should also have the manufacturer’s load chart for quick field calculations. Never rely solely on visual estimation.

General effective capacity guidelines:

• Choker hitch ≈ 0.75 × WLL
• Basket hitch ≈ 2 × WLL
• Vertical hitch ≈ 1 × WLL

Always refer to the manufacturer’s load chart for safe combinations of configurations and angles.

Inspect Webbing Slings to Ensure Safe Installation

Webbing slings are modern lifting solutions that are lightweight, strong, and safe—as long as they are used correctly. Every stage, from inspection and tying method to maintenance, plays a vital role in workplace safety.

By following proper guidelines, accident risks can be significantly reduced, sling lifespan can be extended, and work efficiency can be maintained.

PT Bintang Surya Sejati Sukses (BSS) is committed to providing high-quality, internationally certified webbing slings along with technical consultation services to help you choose and use slings correctly.

Contact BSS to get safe, efficient, and industry-standard lifting solutions.