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Spot on, Rich. In working with trees, understanding the concept is far more valuable than any specific number. There are world-class mathematicians that have been studying biomechanics for years, trying to put numbers out that are repeatable. They are still working....

I think this sketch by Andrew Joslin, aka as moss on treebuzz, nicely illustrates the above points. Understanding and utilizing the combination of force and the structure you are working with are key in preventing canopy tear outs.

Well, with a closing statement like that, a climber would be crazy to use a basal tied system. I use one in almost every tree I climb. Could there be something else to this or are the guys with straitjackets coming for me?

https://www.masterblasterhome.com/showthread.php?17472-Srt-anchor-tip-loads Some nice charts and discussion in this old thread. Yes, friction absolutely does matter, as do all the other components in the situation being examined. The pieces of the puzzle that are explained by math and other...

For reduced friction sure, but aren't you forgetting something?

The truth is that any TIP that you would choose and feel safe with for DdRT will also be safe with a base tied SRT system and often can be made safer by changing force vectors, as Kevin stated, to align with the strongest structure that the tree has to offer. It is not complicated but does...

When you lean on a walking stick, you are loading the wood fibers in compression. Think of how strong a wooden arrow is to withstand the force of being shot from a bow and then slamming into a target and yet how easy it is to break when you bend it sideways. This is true of all wood fiber...

It is very hard to break a branch when it is loaded in compression so always strive for this as you work a tree. When you set your line from the ground, know exactly what it is set on. Use binoculars if you need to. Be concerned with movement within the canopy when you load test your rope...