The rapid development of China's economy has driven the rapid development of the logistics industry, and the rapid development of the logistics industry has promoted the continuous improvement of traffic conditions and the increase of transportation capacity. And cargo tie down also occupies a very important part in our lives.
The minimum breaking force of the wire rope sling should meet the standard requirements and be calculated as the minimum breaking force of the wire rope sling, kN; d is the nominal diameter of the wire rope sling, mm; R. It is the nominal tensile strength of the wire rope sling, MPa; K` is the minimum breaking force coefficient of the wire rope sling of a specified structure. Certain special wire rope slings should be subjected to fatigue test, rubber adhesion test, flatness test, etc.
If the strands and the steel wires in the strands do not change the twisting state in the free state after the ties are untied, and there is no spontaneous loosening tendency, the wire rope sling can be considered as not loose. You can also untie the corresponding two strands at one end of the wire rope sling. There are about two lay lengths. When the two strands are twisted to the wire rope sling again, the steel wire remains in place in the strands and the strands hang on the wire rope. The inside of the rigging should also be restored. In this case, the wire rope sling can be regarded as not loose.
The ratchet buckle can also be applied to cargo tie down.
