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Views: 0 Author: Site Editor Publish Time: 2026-01-16 Origin: Site
When it comes to lifting gear used in steel structures, it is crucial to choose the right equipment for both safety and efficiency. Below is an analysis of the advantages and disadvantages of the most common lifting tools, namely steel wire ropes and chains, as well as some common misconceptions about their usage.
Cost-effective: Steel wire ropes are generally cheaper compared to other lifting gear.
Lightweight: These ropes are easy to handle and convenient to use in various lifting applications.
Moderate hardness: Steel wire ropes offer a certain level of rigidity, making them suitable for pulling components.
Warning before failure: Under normal conditions, steel wire ropes show clear signs of damage before breaking, providing time to address potential issues.
Vulnerable to direct contact with sharp edges: Steel wire ropes should not be in direct contact with right-angled surfaces, as it could cause damage.
Prone to damage: Steel wire ropes can become damaged easily if misused or if the equipment is improperly maintained.
No warning after damage: Once damaged, steel wire ropes may break suddenly, without any noticeable warning signs.
Durable and strong: Chains are much less likely to suffer damage and can handle significantly heavier loads.
High hardness: Chains have a high hardness and are well-suited for lifting materials like H-beams and other heavy steel components.
Expensive: Chains are generally more expensive than steel wire ropes.
Heavy and less portable: Due to their weight, chains are less convenient to handle and transport compared to lighter alternatives.
No warning before failure: Just like steel wire ropes, chains also fail without any warning when overloaded.
One common misconception is that if a steel wire rope can lift 5 tons, then two ropes together can lift 10 tons. This is incorrect. As the angle between the ropes increases, the load on each rope increases significantly, which can overload the ropes. This phenomenon is called the angle load effect, and it can compromise the safety of the lifting operation.
Some operators believe that steel wire ropes and chains are highly safe due to their high safety factor. However, this assumption is based on the idea that the lifting gear is in perfect condition. In practice, lifting equipment can wear over time due to regular use, and worn-out lifting gear can fail unexpectedly even within the rated load capacity. When steel wire ropes are damaged, they may break suddenly without any visible signs of wear. Therefore, it is crucial to conduct regular inspections and replace worn-out gear promptly to ensure safety.
Another common misconception is that the rated load on a single lifting clamp represents the load capacity of two clamps combined. However, most lifting clamps are designed to be used in pairs. The rated load typically refers to the load capacity of a pair of clamps, not a single one. Always refer to the manufacturer's instructions to confirm whether the rated load applies to a pair or a single clamp.
Choosing the right lifting gear for steel structures is essential for both safety and efficiency. While steel wire ropes and chains are both commonly used, it is important to understand their respective advantages, disadvantages, and potential risks in specific applications. Misconceptions such as assuming the combined capacity of multiple ropes or clamps can lead to unsafe lifting conditions. Always ensure that the equipment is in good condition, check the rated loads carefully, and replace any damaged or worn gear to maintain a safe working environment.
For professional guidance on lifting gear selection, maintenance, or steel wire ropes, feel free to contact us for more information.
