Here is a list of definitions that are commonly used throughout this website, print material, andthe lifting industry. Please bookmark this page for reference or check back for any updates as we will try to always keep our reference pages up to date.
A wearing, grinding, or rubbing away by friction.
A sling containing any of the following: chain, master links, hooks or other attachments.
The acute angle between horizontal and the leg of the rigging, often referred to as horizontal angle.
American Petroleum Institute
American Society of Mechanical Engineers
The fitting together of manufactured parts into a complete sling or assembly.
A device used for attaching loads to a hoist. The device may contain components such as slings, hooks, rigging hardware, and lifting attachments.
The twisting of fiber or wire rope in an isolated area of the rope in the opposite direction of the rope lay causing it to take on the appearance of a bird cage.
A sling made from braiding multi-parts of wire rope.
The ultimate load at which a tensile failure occurs.
A sling composed of multiple legs with the top ends gathered in a fitting that goes over the lifting hook.
A type of galvanized wire rope consisting of several wire ropes laid into a single wire rope.
The average location of the weight of an object.
The angle between the vertical part and choked part of a choker type sling. As this angle is decreased, the rated capacity must be reduced accordingly.
The distance around the edge of a closed curve or circular object.
A wire rope fitting consisting of basket and bail.
One who is capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.
The ratio between nominal or minimum breaking strength and rated load.
The distance a straight line passing through the center of a circle or sphere.
The ratio of the diameter around which the sling is bent, divided by the body diameter of the sling.
A sling made up of wire rope, chain, or synthetic webbing that forms a single continuous loop.
Extra Improved Plow Steel (as it pertains to wire rope).
The progressive and localized structural damage that occurs when a material is subjected to cyclic loading.
A metallic button, usually cylindrical in shape, normally fastened to a wire rope by swaging or poured socketing.
Cord or rope of synthetic fiber used as the axial member of a wire rope.
Any functional accessory attached to a sling.
An eye splice that is constructed by opening the rope body into two parts, one having three strands and the other having the remaining three strands
and the core.
Zinc coated for corrosion resistance.
Categorized by strength and/or type of material.
An endless circle or ring fabricated from one continuous length of wire rope.
The shape formed by a line that curves around and along a central line forming a spiral.
A method of rigging (attaching) a sling temporarily to a load or object for the purpose of lifting.
Method of sling loading where the sling is passed under the load with both ends, end attachments (eyes) on the hook, or single master link.
Method of sling loading where the sling is passed around the load through one end attachment or eye and is suspended by the other.
Method of sling loading where the load is suspended on a single part or leg.
A mechanical device for lifting and lowering loads.
A curved or angular piece of metal for lifting, pulling or suspending.
A mechanical device used to close the throat opening of a hook.
Independent Wire Rope Core
Japanese Industrial Standards
A unique deformation of a wire rope caused by a loop being pulled down tight. It represents irreparable damage and indeterminate loss of strength
in the wire rope.
The direction of a strand or wire helix (as it pertains to wire rope).
The distance in which a strand makes one complete helical revolution around the wire core.
The object being lifted or lowered.
Forged or welded steel link used to support all members (legs) of a sling.
A non-welded, mechanically closed link used primarily to attach fittings to alloy steel chains.
Naval Facilities Engineering Command
Relating to a designated or theoretical size or strength that may vary from the actual.
A wire rope fitting that consists of a basket and two ears with a pin.
Occupational Safety & Health Administration
A continuous loop of polyester yarn covered with a polyester fabric.
Wire rope in which the strands are permanently formed during fabrication into the helical shape they will assume in the wire rope.
The specific load applied in performance of the proof test.
A nondestructive tension test to verify the integrity and workmanship of the individual sling.
A person who, by possession of a recognized degree, certificate, or professional standing, or who by extensive knowledge, training and experience, successfully demonstrated the ability to solve/resolve problems relating to the subject matter, the work, or the project.
A rigger who meets the criteria for a qualified person.
The maximum allowable load established by the sling manufacturer. The terms "rated capacity" and "working load limit" are commonly used to
describe rated load.
A metal link, typically U-shaped, closed by a bolt, and used to secure a sling.
A tubular piece manufactured from metal that fits over a wire rope.
An assembly to be used for lifting when connected to a lifting mechanism. The upper portion of the sling is connected to the lifting mechanism and the lower supports the load.
A master link designed to be used with multi-legged slings or assemblies.
The process of mechanically forming a fitting onto the eye or end of a wire rope.
Grooved metal fitting to protect the eye, or fastening loop of a wire rope.
A sling made of synthetic materials such as nylon or polyester.
A wire rope fitting where in the rope end is secured by a wedge.
A flexible rope constructed by laying steel wires into various patterns of multi-wired strands around a core system to produce a helically wound rope.
The maximum allowable working load established by the sling manufacturer. The terms "rated capacity" and "working load limit" are commonly used to describe rated load.
Web Sling & Tie Down Association