Wire Rope Design Factor Working Load

5 when disposal materials are dropped more than 20 feet to an exterior location an enclosed chute must be used.

Wire rope design factor working load. The design factor is the ratio of the breaking strength of the rope to the maximum working load. Rated capacity in tons of 2 000 lbs. Nominal strength in short tons. This load represents a force that is much less than that required to make the lifting equipment fail or yield also known as the minimum breaking load mbl.

Cable diameter breaking strength working load limit 5 1 design factor. 0 13 m wire rope is about the same as its 170 tonne payload. The typical design factor for wire rope used as a sling is 5 1. And is working under an operating stress of 20 000 lbs it has a rope strength design factor of 5.

Rated capacities based on design factor of 5. The individual wires may all be the same size or a mixture of sizes. The result is the safe working load in tons. At 3000 m 9840 ft the weight of a 5 in.

Strands the design arrangement of a strand is called the construction. Wire rope must have the strength required to handle the maximum load plus a design factor. The rope strength design factor is the ratio of the rated strength of the rope to its operating stress. The design factor is the ratio between the ultimate strength of the rope and the recommended working load limit wll.

A wire rope sling with a strength of 10 000 pounds and a total working load of 2 000 pounds has a design factor multiplier of. Nominal strength in pounds. It is operating at one fifth or 20 of its rated strength. To calculate the swl you ll need to know the diameter of the rope in inches and apply it to the formula swl d x d x 8.

Nominal strength in metric tons. 1 partslings vertical choker or vertical basket. Recommended safe working load a 5 1 design factor lbs. Nominal strength in kg.

We provide wire rope chain synthetic slings cargo control hardware. At a depth of about 6000 m 19700 ft the safe working load swl of the steel wire rope is entirely used up by its self weight leaving zero payload capacity. Swl or wll are calculated by dividing mbl by a safety factor sf. Rated capacities shown apply only to 6x19 and 6x37 classification wire rope.

The safe working load is the mass that lifting equipment usually a wire cable can safely hold without fear of breaking. If a particular rope has a rated strength of 100 000 lbs.