aSheave diameter/rope diameter.


Proof Load - The average force to which an item may be subjected before visual permanent deformation occurs or a force that is applied in the performance of a proof test. Usually the value of proof load is equal to 150 to 200 percent of the rated load value.

Proof Test - A term designating a tensile test applied to the item for the sole purpose of detecting injurious defects in the material or manufacture.

Rated Load Value - The maximum recommended load that should be exerted on the item. The following terms are also used for the term Rated Load: "SWL," "Safe Working Load," "Working Load," "Working Load Limit," and the "Resultant Safe Working Load." All rated load values, unless noted otherwise, are for in-line pull with respect to the centerline of the item.

Safety Factor - An industry term denoting theoretical reserve capability. Usually computed by dividing the catalog stated ultimate load by the catalog stated working load limit and generally expressed as a ratio, for example, 5 to 1.

Shock Load - A resulting load or force from the rapid change of movement, such as impacting or jerking, of a static load. A shock load is generally significandy greater than the static load.

Ultimate Load - The average load or force at which the item fails or no longer supports a load.

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