BMP - Tree Risk Assessment - 58

wood strength, such as from fungal decay. Stress also may be increased
locally at a sharp angle bend, a notch cut or canker, or other conditions collectively referred to as " stress raisers. " Under load, stress raisers may act as
failure initiation points-the point where breakage starts.
Stress is also a function of tree height or branch length. A taller tree that
has the same trunk diameter as a shorter tree has higher stress in the lower
trunk, if all other conditions are equal. The actual stress is also dependent
upon the trunk cross-sectional size and shape, crown configuration, and
wind exposure.
Strength is defined as the ability to withstand stress without failure.
Strength is a species-specific property of wood as a material, and of the
tree as a structure. Breaking stress is the magnitude of stress sufficient
to cause failure. In general, the wood of temperate tree species is about
twice as strong in tension as in compression. In all species, for a failure
to occur, the stress on the trunk, branch, root system, or associated soil
must exceed the strength of that part.

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BMP - Tree Risk Assessment

Table of Contents for the Digital Edition of BMP - Tree Risk Assessment

Table of Contents
BMP - Tree Risk Assessment - Cover1
BMP - Tree Risk Assessment - Cover2
BMP - Tree Risk Assessment - i
BMP - Tree Risk Assessment - ii
BMP - Tree Risk Assessment - Table of Contents
BMP - Tree Risk Assessment - iv
BMP - Tree Risk Assessment - 1
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BMP - Tree Risk Assessment - Cover3
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