2013, May

The single, most popular question asked at our training is, “What is the recommended D/d for web slings?” D/d is a well-known consideration for wire rope slings, where “D” represents the Diameter of the object the sling contacts and “d” represents the diameter of the wire rope sling. If a 1 Inch diameter wire rope sling is used in a basket hitch around a 25 Inch Diameter object, a 25/1(D/d) results and the wire rope sling has full basket capacity. Conversely, if the same 1 inch diameter wire rope sling is used on an 8 inch diameter object, resulting in an 8/1 D/d, the wire rope sling loses efficiency and the basket capacity must be reduced by 16%.