Wire Rope Ratings Strength

Minimum sling length when using standard eyes.

Wire rope ratings strength.

Basket ratings are based on a minimum d d of 25. D d ratio is the ratio of the diameter. Minimum breaking strength refers to the smallest load that will pull a piece of wire rope apart. Basket hitch capacity based on minimum d d ratio of 25 1.

Nominal strength in kg. Rated capacity is based on nominal wire rope breaking strength. It is recommended not to exceed 1 3 3 1 design factor of the rope s strength to maintain a useful service life. The same standard requires a design factor of 5 0 for rotation resistant ropes.

Nominal strength in short tons. Starlift xtra wire rope has one of the highest strength to diameter ratios on the market. You ll likely see two different ways to measure the breaking strength of wire rope. Strength breaking tenacity dry grams denier wet strength vs.

A fitting having an efficiency rating of 90 may very well develop 100 of the rope s catalogue breaking strength because the rope s actual breaking may very well be 5 15 higher. Nominal strength in pounds. Efficiency rating depends on rope size and core type. M f g 1 where.

For choker hitch the angle of choke shall be 120 degrees or greater. Wire rope slings wire rope environmental considerations. Asme b30 5 mobile and locomotive cranes requires a design factor of 3 5 for 6 strand hoist ropes. Number of parts of rope in the sling.

Aggregate strength refers to the collective breaking strength of all of the wires in a single cable when a manufacturer tests them individually. The strength of the sling is decreased. Recommended safe working load a 5 1 design factor lbs recommended safe working load a 5 1 design factor kg recommended safe working load a 3 5 1 design factor lbs. F force weigh t n m mass kg g acceleration of gravity 9 81 m s2 maximum safe mass for a 3 8 wire rope where the safe load is 10 9 kn can be calculated as.

Cordage instutitute uses refernece size number which is the approximate circumference of the rope. Nominal strength in metric tons. Type of hitch vertical choker or basket. M 10 9 103 n 9 81 m s2 1111 kg.

1 ton 2 000 lbs. 1 use only with 6 strand wire rope. Dry strength shock load absorption ability.