โซ่ยกแบบกําหนดเอง

Lifting chains find application in a wide range of industries and sectors that involve material handling and lifting operations. They are commonly used in construction sites for lifting heavy equipment, building materials, and structural components. Lifting chains are valuable in manufacturing facilities for hoisting machinery, engines, or heavy parts. They are also employed in the transportation and logistics industry for cargo handling and securing loads on trucks, cranes, or ships. Additionally, โซ่ยก are used in the mining, oil and gas, and marine sectors for various lifting and rigging tasks.

Alloy Chain Grade 80 or Grade 100 should be used for overhead lifting. ASTM states that alloy chain shall be able to elongate a minimum of 20% before fracture (7.3.5). To ensure that alloy chain consistently meets this requirement, ASTM requires the use of certain alloying elements in the manufacturing of the steel for alloy steel chain. These alloys can vary from company to company, but some key requirements are specified by ASTM. The alloy properties also improve the wear and tear that the chain will experience.  Note that when chain is in use, no amount of stretch is allowed.

Proper usage of โซ่ยก is crucial to ensure safe lifting operations and prevent accidents or equipment failure. It is important to select the appropriate ยกโซ่ based on load requirements, working load limits, and industry standards. Regular inspection and maintenance of โซ่ยก are necessary to identify any signs of wear, damage, or deformation that may affect their strength. Proper training and adherence to safety guidelines are essential for operators and riggers working with โซ่ยก to minimize risks and ensure optimal performance.

The safety measure was identifying which types of chain are appropriate and strong enough for overhead lifting. Anytime we move or lift a load it is dangerous. Moving a load along the ground has the advantage that the ground is supporting the load. We have to overcome the coefficient of friction to move the load. The chain’s working load limit does not have to match the weight of the load. It needs to be able to handle the tension applied, which is based on the surface that it is being moved over plus some fraction of the weight of the load. This can be calculated using formulas.

If we lift that same load off the ground, we now have to overcome gravity. The chain’s working load limit will have to be of sufficient strength to support the weight of the load plus any additional forces imposed by angles and hitch type(s) used.