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Lever arm?


Harry_L
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"The length of a structure free to move at one end in the manner of a lever, such as a branch, and the distribution of weight along that length affecting loading at the base."

 

Taken from from Phillip Wilson's really useful Arb terminology

 

Tree term definitions -

 

Worth getting hold of Claus Mattheck and Ducan Slaters work and then go out in to the woods and see it all in the flesh.

 

No better way to learn :thumbup1:

 

 

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It's a confusing term, as it sounds like it should be a thing but instead it's a distance, a number.

 

All other things being equal, the torque at the base of a lever (like a branch) is proportionate ti the length (the lever arm) of the lever. The longer the branch the more likely it is to tear at the base.

 

Officially one can't say 'what is a lever arm?' you should say 'what is lever arm?'

Edited by daltontrees
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It's a confusing term, as it sounds like it should be a thing but instead it's a distance, a number.

 

All other things being equal, the torque at the base of a lever (like a branch) is proportionate ti the length (the lever arm) of the lever. The longer the branch the more likely it is to tear at the base.

 

Officially one can't say 'what is a lever arm?' you should say 'what is lever arm?'

 

Is there a recognised term for the stem wound resulting from the failure of the lever arm?

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