Steel Chain Working Load Limit

Do not tie knots or allow chains to become twisted.

Steel chain working load limit.

Working load limit wll of a chain is another designated safety measure. Grade is intended to indicate the strength and tolerance of welded steel chains. Do not load an assembly in excess of working load limits shown. Grades 100 80 70 43 and 30 are specified by the national.

Also known as grade 30 proof coil chain it s used in a. Chain is embossed with both the grade and size so you can determine its wll using this chart. How to determine a chain s working load limit. Grade 30 is a multipurpose economical chain.

B the working load limits of tiedowns may be determined by using either the tiedown manufacturer s markings or by using the tables. Do not use a chain that appears to be defective worn or damaged. The wll of a chain is determined by both the grade and the diameter. Chain grades advertised by manufacturers are one tenth of the actual mathematical grades.

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. Determining chain working load limits. Do not put an unequal load on one leg of a sling. 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.

Do not expose assembly to impact rapid lifts or sudden stops. 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. Types of chain grade 30 chain. So grade 80 is really 800 and grade 120 is 1 200.