Ape Strength: Myth vs Reality

[Shadow]

(01-22-2019, 03:40 AM)Spalea Wrote: @Shadow :

You wrote:

"Here is site I use. Here you can choose what species of tree, how big humidity % and then you need just to put volume there :) Quite handy site.


https://www.timberpolis.fi/calc-timber-w...anguage=en"


By this link:

https://www.engineeringtoolbox.com/wood-...-d_40.html

I just come to see that the wood density is much more variable than I previously thought... The humidity is a part of wood volume whose density is 1...

Let us choose the wood type, the humidity fraction and let us solve that !

Because there is no way to know that tree species, this is of course only a rough estimation. But I don´t think, that they put there logs of oak or teak, so spruce-birch  might be quite close.

Spruce with volume 0,15 cubic meters weight of dry log might be about 70 kg and if that log would be with 40 cm diameter, volume 0,25 cubic meters then about 115 kg.
Birch with volume 0,15 and dry about 95 kg and if 0,25 cubic meters about 160 kg.

Most important, I think, would be to know what tree species that is, then it would be quite easy to use calculators to get better estimation with smaller margin between lowest and highest possible weight. Anyway my own estimation is, that this log is a little bit under or over 100 kg. But I won´t say, that it couldn´t be even 150 kg, I just estimate it myself to about 100 kg when looking at how dry it looks like to be. Pity that it is winter, in summertime it would be easy to find logs here where I live :) Reply