What commonly causes tree structural failures?

Tree structural failures are often the result of a combination of structural defects or conditions. This includes factors such as weaknesses in the tree's structure, inherent defects like cracks, decay, or poor branching architecture, along with the influence of external conditions. For instance, high winds, heavy snowfall, or soil instability can exacerbate these inherent structural issues, leading to failure.

Understanding that multiple factors contribute to tree stability is essential for risk assessment. A single defect or adverse environmental factor may not cause failure on its own; however, when they work in conjunction, the likelihood of failure increases significantly. This holistic approach allows for more accurate predictions about tree safety and effective management strategies to mitigate risks.