Ch 3 Utility Pruning Flashcards
Population of trees that could now or in the future interfere with the operation of utility
Utility Forest
Process of branch removal in which the pruning cuts are made at nodes and in relation to the positions of the branch collar and branch bark ridge
Natural pruning
Pruning system that uses a combination of pruning, supporting and training branches to orient a plant into a desired shape.
Topiary
pruning cut that removes the smaller of two branches at a union or a parent stem, without cutting into the branch bark ridge or branch collar, or leaving a stub.
branch removal cut
Soil conditions, site disturbance available moisture, competition from other plants and other factors can affect the direction and in tensity of growth following pruning.
Site factors
a structural development pruning technique that uses reduction or heading cuts to reduce branch length relative to other similar branches. The subordinated branch grows at a comparatively slower rate
Subordination
Characteristics that make tree’s likely to fail
Dead or declining
* Broken or partially failed, due to an earlier
injury
* Adventitious (arose as sprouts, e.g., from old pruning wounds)
* More upright or codominant, especially when included bark is present at the branch union
* Overextended or poorly tapered, especially with heavy loads toward the distal end (e.g., lion tailing)
* Showing significant defects that compound any of the above, large cavities, decay
selective removal of branches to guide and / or discourage growth in a particular direction.
directional pruning
- Line priority
- Tree species and condition, including branch length and size
- Susceptibility to storms
- Community norms
Managing overhang
in vegetation management, the area outside the right-of-way, where tall-growing species may be allowed, although they need to be monitored for risk.
peripheral zone
When should a tree be removed
When it costs more to prune, it’s risky or does not respond to pruning
A revision of the ansi z133 standard intended to be the standard reference for those engaged in tree care work
Ansi z133-2000
results-based strategy designed to target trees as close as possible to the time that they interfere with facilities is called ________ _______ _______ management .
Just in time
Which clause of the Occupational Safety & Heath requires that employers to provide their employees working conditions that are free of known dangers?
General Duty clause
Utility pruning should use _____ and _______ pruning principles
natural & targeted
Sprout growth following pruning usually comes from
adventitious buds
Tree-caused physical damage to conductors, electrical equipment, and/or supporting structures is an example of a _____ failure.
Mechanical
If you find a tree leaning on a line, stay at least ____ ft away.
35
A tree or branch coming into contact with an energized
conductor, causing a short circuit is an example of an
electrical failure
Pruning cut that removes the larger of 2 or more branches or stems
Reduction cut
The area where a branch joins another branch or the trunk:
branch collar
The tree protection zone for a mature tree with a moderate
tolerance to disturbance should be _____ ft per inch
1ft
Three tree & electrical system characteristics that influence
the likelihood of a tree-related service interruption are
voltage gradient, stem diameter, & species
Trees or branches that fall from outside utility easement have a ____ impact on service than trees growing into and contacting lines
Greater
