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Glossary of terms

" (Inch):

A measurement in Inches  i.e 1/2" + 1/2 Inch.

Dia (Diameter):

Measurement for measuring across the round or thickness.


Unit of measure in kilogrammes used for weight.


Unit of measure in pounds used for weight and for force.

MBL (Minimum Breaking Load):

The Minimum breaking or failure load is the specified load (mass or force) below which the item of equipment does not fail either by fracture or distorting to such an extent that the load is released.


A measurement in millimetres.

Statement of Conformity:

A Statement of Conformity is a certificate issued by the manufacturer confirming that any necessary manufacturing tests have been carried out and confirming the safe working load. The statement of conformity has the same status as a test certificate and must be retained for inspection when required. 

SWL (Safe Working Load):

Safe Working Load, The safe working load is the maximum load (mass) as assessed by a Competent Person which an item of lifting equipment may raise, lower or suspend under the particular service conditions. The safe working load will normally be the same as the working load limit or the maximum safe working load where the term is used; but it may be less. Safe working load appears in statutory records.

Test Certificate:

A Test Certificate is a certificate issued by a competent person giving details of the test or tests and thorough examination conducted on an item of lifting equipment certifying its fitness for safe use. 

WWL (Working Load Limit):

Working Load Limit, The Working load limit is the maximum load (mass) that an item of lifting equipment is designed to raise, lower or suspend. In some standards and documents WWL is referred to as the 'maximum safe working load'.