Steel Chain Working Load Limit

Do not tie knots or allow chains to become twisted.

Steel chain working load limit.

Also known as rated capacity the working load limit wll indicates the maximum load that a new and undamaged straight length of chain can potentially handle. B the working load limits of tiedowns may be determined by using either the tiedown manufacturer s markings or by using the tables. Distribute the load evenly. Determining chain working load limits.

Do not expose assembly to impact rapid lifts or sudden stops. Grades 100 80 70 43 and 30 are specified by the national. Chain grades advertised by manufacturers are one tenth of the actual mathematical grades. Do not put an unequal load on one leg of a sling.

The wll of a chain is determined by both the grade and the diameter. Do not load an assembly in excess of working load limits shown. Working load limits for steel strapping working load limits for wire rope size wll size wll size wll 45mm 1 3 4in 790kg 1 750lb 31 7 x 74mm 1 1 4 x 0 029in 540kg. Grade is intended to indicate the strength and tolerance of welded steel chains.

So grade 80 is really 800 and grade 120 is 1 200. Also known as grade 30 proof coil chain it s used in a. Chain size in millimeters inches unmarked chain grade 30 proof coil grade 43 high test grade 70 transport grade 80 alloy grade 100 alloy chain. How to determine a chain s working load limit.

Grade 30 is a multipurpose economical chain. A the working load limit wll of a tiedown associated connector or attachment mechanism is the lowest working load limit of any of its components including tensioner or the working load limit of the anchor points to which it is attached whichever is less. Chain is embossed with both the grade and size so you can determine its wll using this chart. Do not use a chain that appears to be defective worn or damaged.