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The American National Standards Institute (ANSI) approved a new standard for tree risk assessment designated ANSI A300 (Part 9)-2011 Tree Risk Assessment a. Tree Structure Assessment.

New national standard for tree risk assessment

According to the Tree Care Industry Association (TCIA), The American National Standards Institute (ANSI) approved a new standard for tree risk assessment designated ANSI A300 (Part 9)-2011 Tree Risk Assessment a. Tree Structure Assessment.


The new Tree Risk Assessment a. Tree Structure Assessment is the first national standard to address risk assessment of trees and takes precedence over any previous tree care management standards and guidelines. The standard addresses the following items:

Tree structure assessment practices, including:
Levels of tree risk assessment
Target identification
Risk analysis and reporting
Owner determination

The A300 Tree Risk Assessment standard uses the international standard series for risk management, including ISO 31010 Risk Management – Risk Assessment Techniques, as a guiding principal.

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