Publish Time: 2026-04-03 Origin: Site
The safety of wire ropes in construction and lifting operations depends on correct splicing techniques and adherence to established standards. Below are the key specifications for wire rope termination lengths and splicing practices in various standards and regulations.
According to the "Building Machinery Safety Technical Code JGJ 33-2012", when a wire rope is secured using a splice, the length of the splice must not be less than 20 times the diameter of the wire rope. Additionally, the splice should not be shorter than 300mm, and it must be tied with fine steel wire. If using a rope clamp for connection, the number of rope clamps must match the diameter of the wire rope, as outlined in the table. The spacing between clamps should be 6 to 7 times the diameter of the wire rope. The distance between the last clamp and the rope end must not be less than 140mm. Furthermore, the saddle of the rope clamp should be positioned on the side of the rope under load, with the U-bolt at the rope's end. It is also important that clamps are re-tightened after the rope is loaded, ensuring the end of the wire rope is compressed by 1/3 of its diameter height. Regular checks should be made during operations to ensure proper tightening.
The "Crane Safety Code Part 1: General Provisions GB 6067.1-2010" specifies that when splicing is used, the splice length should not be less than 15 times the diameter of the wire rope, with a minimum splice length of 300mm. This regulation ensures the strength and stability of the splice in lifting applications.
As per the "Safety Technical Specifications for Lifting and Hoisting in Construction JGJ 276-2012", slings or rope loops should use spliced terminations, with the splice length not being less than 20 times the diameter of the wire rope. This specification ensures that the sling maintains sufficient strength and safety during operations.
The "Safety Technical Specifications for Installation, Use, and Dismantling of Tower Cranes in Construction JGJ196-2010" specifies that when wire rope ends are spliced, the splice length should not be less than 20 times the wire rope diameter and must not be shorter than 300mm. The inserted strands should be tightly pulled, with protruding parts being smooth and flat. A suitable length should be left at the splice's end and secured with metal wire. The splicing method should follow the current industry standard "Safety Code for Lifting Equipment and Rigging LD48". In cases where other splicing methods are used, the connection strength should not be less than 75% of the rope's minimum breaking strength.
The "Construction Site Machinery Equipment Inspection Technical Specification JGJ 160-2016" stipulates that when splicing is used, the splice strength must meet specific requirements. The splice length should not be less than 20 to 25 times the diameter of the wire rope, and the shortest splice length should not be less than 300mm. The spliced section should be secured with fine steel wire, with the tying length being greater than 20 times the wire rope diameter.
Ensuring proper wire rope splicing and termination lengths is crucial for the safety and reliability of lifting equipment. The regulations from various standards provide clear guidelines for the required lengths and methods of securing wire ropes in different lifting applications. Following these specifications ensures that lifting operations remain safe, and the equipment performs efficiently and effectively.
By adhering to these industry standards, construction companies and lifting equipment operators can ensure the longevity and reliability of their wire ropes, preventing accidents and enhancing overall operational safety.
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