What happens when a tree is leaning in the direction of a fall and splits upward from the back cut?

When a tree is leaning in the direction of a fall and splits upward from the back cut, it creates a barber chair. A barber chair occurs when the tree's upper section splits away from the lower section, often in a dramatic and dangerous manner. This typically happens when the back cut is made too deep or too high, which can result in the tree's weight causing it to pivot backward while still being partially supported by the hinge wood. As the tree splits upward, the top portion can detach and fall suddenly, creating the characteristic barber chair effect, resembling a barber's chair.

Understanding this concept is crucial for safety during tree felling, as it highlights the risks associated with improper cutting techniques and tree angles. The barber chair effect can lead to unexpected and hazardous situations for the person felling the tree and those nearby. Proper cutting techniques, including making an adequate back cut and understanding tree lean, are essential to prevent this dangerous outcome.