|Various Hoist Classifications as Determined by ISO/JIS|
|State of Loading||Total Duration of using (hour)|
|Light||Mechanisms subjected very rarely to the maximum load and, normally, to light loads||--||--||M1||M2||M3||M4||M5|
|Moderate||Mechanisms subjected fairly frequently to the maximum load but, normally, to rather, moderate loads||--||M1||M2||M3||M4||M5||M6|
|Heavy||mechanisms subjected frequenctly to the maximum load and, normally, to loads of heavy magnitude||M1||M2||M3||M4||M5||M6||--|
|Very heavy||Mechanisms subjected regularly to the maximum load||M2||M3||M4||M5||M6||--||--|
State of Loading and total duration of useing are the factors used to determine the hoist classification that should be used: M1, M2, M3, M4, M5, or M6. Cross referecing the two factors with one another will lead to a classification choice in the Chart
1. A hoist that would be subjected frequently to the maximum load and, normally, to loads of heavy magnitude (a “heavy” state of loading), that requirement a lift span of 1600 hours should be in classification group M5.
2. A hoist that would be subjected very rarely to the maximum load and, normally, to light loads (a “light” state of loading), that requires a life span of 6300 hours should be in classification group M4.
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