Risk Assessment Flashcards

When assessing a tree near a structure, which condition most significantly increases the risk of failure?

Answer: Co-dominant stems with included bark

Co-dominant stems with included bark create a weak attachment zone prone to splitting under load.

A CTSP is assessing a tree after a severe ice storm. Which part of the tree should be inspected FIRST for structural compromise?

Answer: Major branch unions and scaffold limbs

Major branch unions and scaffold limbs bear the greatest load during ice events and are most prone to failure.

What does the term 'target' refer to in the context of tree risk assessment?

Answer: People, property, or activities that could be struck by a falling tree or limb

In risk assessment, a target is any person, property, or activity that could be harmed if a tree or part fails.

Which assessment method involves lightly tapping the trunk with a mallet to detect internal decay?

Answer: Sound testing (sounding)

Sound testing (sounding) uses a mallet to detect hollow areas by the change in resonance.

A tree shows crown dieback affecting 40% of its canopy. What does this most likely indicate?

Answer: Significant root or vascular system stress

Dieback affecting 40% of the crown signals serious root dysfunction, disease, or vascular failure.

Which factor is considered when evaluating the 'likelihood of failure' in tree risk assessment?

Answer: Structural defects, tree condition, and loading factors

Likelihood of failure is assessed by examining structural defects, overall tree condition, and anticipated loads such as wind and ice.

During a risk assessment, a CTSP finds a large cavity in the base of a mature oak. What is the most critical next step?

Answer: Determine the extent of cavity and remaining sound wood thickness

Determining cavity extent and remaining sound wood thickness helps quantify structural loss before deciding on action.