There are many reasons to fell a tree. Especially when it threatens to fall by itself. But how did we know?
This is an example of a Korean Fir and the general description of the felling process. This was necessary because the tree had already inclined. Unfortunately, this is hardly visible in the photo. But the real cause you will easily recognize at the end.
In a domestic environment, it is almost never possible to saw off a tree down and let it drop lengthwise. Therefore, other methods must be used to keep the destructions low. That means in most cases, you have to cut the tree into parts in order to reduce the falling weight. And only if the pieces are light enough, you can bring the branches accurately to the ground.
The tree is therefore delimbed from the bottom to top in order to have free space underneath. Instead of climbing in the tree, you can also rent a boom lift and cut the tree from the outside. If this is possible at all - it even sometimes needs more effort. Because you must first cut yourself into one side of the tree and then control the gondola with every move in many other position. This costs lots of time.
The fastest method is therefore to climb into the tree and to cut off the branches from the inside. No garden owner should do this himself and leave it to the professionals who have the appropriate knowledge of the security methods. Fearlessness with a running chainsaw in its hands is absolutely not required!
Successively all branches are cut off from the bottom, until the top of the tree is reached. But unfortunately you get only as high as the thinner getting top still carries a man's weight. This too, can only decide an experienced expert. The top of the tree is a significant weight, so this is an additional risk. But it is once cut, the tree climber moves back down and sawes as long pieces as possible from the stem. The size depends on which damage you may cause underneeth. The falling weight of 20 Kilos in 20 metres of height makes funny holes in the ground.
The cut always takes place exactly horizontally until the blade of the chainsaw has cut the trunk completely, but is still is stuck between the two sections. The piece will not fall because it stably satnds on the rest of the trunk. Then the saw is stopped and the portion is simply tilted away from the cutter. The is percedure is repeated as long one arrives back on the ground.
Throughout the process the ground staff is very important to clear away the falling cut immediately. Because to untie a knoted pile of branches takes longer than to fell the tree!
Also you should think about the disposal of the wood and green. Only the branches of Korean Fir fills, finely cut, a volume of 10 cubic meters. No wood in it, yet!
Why the tree had to be felled can be clearly seen at the lowest stem cuts. It turned out that he was hit by an excavator during building work many years ago. This wound was repaired with metal staples and was no longer visible from the outside after about 20 years.
But now back to the 'invisible observations': ... the tree stank like dead fish ! ...