Evaluating Hazards
Tree assessment, evaluation, and risk.
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Tree Structure and Biology
Tree Structure and Biology
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Tree Defects
Tree Defects
- Trees that are preventively pruned are less likely to fail than neglected trees.
- Trees with one dominant trunk fare better than trees with codominant stems.
- Trees with bark inclusions are prone to falling apart.
- Large pruning cuts create decay and cracks that can lead to breakage in storms.
- Trees in a group blow down less frequently than single trees.
- Tree trunks can be hollow without openings in the lower trunk; these are prone to failure in storms.
- Trees that have failed before are likely to fail again.
- Topped trees break.
- Over-pruning palms can increase their susceptibility to damage in storms.
- Recently cleared lots were very susceptible to tree damage.
- Preventing Hazards
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Potential Hazard Causes
Potential Hazard Causes
Tree Strengths and Weaknesses
Impairment of Uniform Stress Distribution
Damage to Existing Support
Remedial Actions