In the lifting and hoisting operation, the lifting angle of the sling, according to the price of the tensioner applied by Wuxi lifting manufacturer, its general requirement is not less than 45 degrees, otherwise it will cause problems. For high temperature type slings, the temperature limit is usually 400 degrees, but at this time, the load of the sling is reduced. When the membrane structure tensioner is subjected to structural stress, it should be simple and the force should be clear to reduce the effect of concentrated stress. Add some manipulation knowledge by the question. About the rigging, there are questions about it, in addition to the existing ones: Question 1: Which is the best tensioner, and how to understand it? What is the name of the "O" shaped end of the weave?