Selection criteria for Galvanised Steel Wire Ropes for building hoisting

The selection of Galvanised Steel Wire Rope for building hoisting should follow four core standards:

Load matching principle: Calculate the minimum breaking force (MBL) required based on the weight of the hoisted object, and the safety factor shall not be less than 6 times. For example, a wire rope with MBL ≥ 30 tons should be selected for a 5-ton hoisting load, and the load distribution of multiple branches should be considered.

Diameter adaptation rule: The nominal diameter of the Galvanised Steel Wire Rope must match the pulley/drum diameter. The pulley diameter is usually required to be ≥ 20 times the wire rope diameter to avoid fatigue fracture caused by excessive bending.

Zinc layer quality control requirements: Hot-dip galvanizing process is preferred, the zinc layer adhesion is ≥ 300g/㎡, and there is no red rust in the neutral salt spray test for 72 hours to ensure anti-corrosion performance in marine climates.

Structural selection specifications: It is recommended to use a 19×7 non-rotating structure for building hoisting, with an outer steel wire diameter of 0.6-0.7 times the core wire diameter, taking into account flexibility and wear resistance, and reducing the risk of self-rotation during multi-limb hoisting.

During actual selection, the manufacturer’s ISO certification and third-party test report should be checked simultaneously, and a usage record should be established to track accumulated fatigue damage to ensure safety and control throughout the life cycle.