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This page provides links to sites providing data on human strength and endurance.
The following data is for guidance and is not for detailed design.
In designing any equipment requiring manual handling one is advised to refer the the relevant regulations. Ref. HSE Info
There are three basic categories of strength:
Obviously a person can exert the maximum forces with impulsive strength and the
minimum forces with static strength.
Below are presented some strength values.. These must be used with extreme caution and are provided as easy look-up values to give the feel of the forces related to certain tasks. They are not intended to be statistically justifiable. The links below include quality information to be used for important work..
Gripping Strength persons..... age 31 - 50; gripping a test handle 50mm wide x 100mm long
Turning Circular Knob persons.. age 31 - 50; Smooth 40 dia x 20 Dp horizontal axis
Twisting Lid.... persons age 31 - 50; knurled Lid 65mm dia
Pulling Horizontal Bar.... age 31 - 50; Horizontal bar 20mm dia x 300 Lng 1-handed
Pushing Horizontal Bar.... age 31 - 50; Horizontal bar 20mm dia x 300 Lng 1-handed
Pressing Pedal .... age 31 - 50; A pedal 400mm length and 30mm wide, placed inside a 55mm wide space to restrict the amount of the foot that can be placed onto the pedal.
Arm Strength values. (From USA - Adjusted (reduced) values based on tests on young men 80% of (5th percentile group) - Better info in link 4 below
With ample work space 95% of young fit men can lift these weights to the heights indicated.
People use legs when standing, walking running and when cycling and operating foot
controls....The legs are generally capable of lifting and supporting high loads.
When standing with the legs locked the legs can support very high loads.
I've reviewed the various data sources and there is such a scatter of information that
anything I include at this basic level could be misleading..The links below provide quality
information on this topic
To give intuitive guidance a couple of values are provided below .
Links to Ergonomic Sites providing strength information
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Last Updated 10/01/2013