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1. Name three instances in which cabling might be called for in a tree:
a. b. c.
Support a weak branch union Support for multi-stemmed trees Weak-wooded tree
Chapter 9 – Workbook Questions
2. Common grade cable is relatively malleable (bendable) and easy to work with. ______ _____ ________ cable is much stronger but less flexible than common-grade cables.
extra high strength
Chapter 9 – Workbook Questions
3. One advantage of ________ ______ is that it’s both strong and flexible. A potential drawback is the limitation of choices for attachment.
aircraft cable
Chapter 9 – Workbook Questions
4. As a general rule, cables should be installed _____ _______ the distance from the weak branch union to the top of the tree, as long as the wood is solid and large enough to install hardware.
two - thirds
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5. Limbs may be brought closer together while installing the cable, so that when released, the cable will be just ____. taut
Chapter 9 – Workbook Questions
6. Dead-end hardware such as ________ or __________ can be used as anchors in smaller branches that are not decayed.
lag eyes lag hooks
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7. In decayed wood, or limbs greater than 8 inches in diameter, ____ _____ or _________ _____ with __________ ____ must be used to attach cables.
eye bolts threaded rods amon-eye nuts
Chapter 9 – Workbook Questions
8. True / False – When more than one cable is installed on the same limb, the hardware should be spaced at least as far apart as the diameter of the limb.
Chapter 9 – Workbook Questions
9. A ________ is used to form the eye at the end of the cable.
thimble
Chapter 9 – Workbook Questions
10. EHS cable should be attached to hardware using _________ ______. dead-end grips
Chapter 9 – Workbook Questions
11. True / False – The installation of metal cables, if done properly, will not wound the tree.
Chapter 9 – Workbook Questions
12. The two types of rods commonly used to brace a tree are _________________ ____ and ____________ _____.
machine-threaded rods lag-threaded rods
Chapter 9 – Workbook Questions
13. When bracing a tree with machine-threaded rod, the pre-drilled hole should be approximately 1/16 to 1/8 inch _________ than the diameter of the rod. larger
Chapter 9 – Workbook Questions
14. ________ _______ _______ allows for more tree sway, enacting restraints only when environmental conditions demand it.
Dynamic support systems
Chapter 9 – Workbook Questions
Protected White Mulberry, Cervia Italy Photo Credit: Natural Path Urban Forestry
15. ________ is the installation of a cable between a tree and an external anchor to provide supplemental support and reduce tree movement.
Guying
Chapter 9 – Workbook Questions
16. Rigid structures mounted or built on the ground to support a branch or trunk are called ______ . props
Chapter 9 – Workbook Questions
Cedar of Lebanon, Parco Masseri, Ferrara Italy Photo Credit: Natural Path Urban Forestry
17. A phenomenon in which lightening travels down the stem for a distance and then leaves the trees, “jumping” to a more conductive tree, structure, person, or animal is called ____ _____. side flash
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18. The main conductor of a lightening protection system is a cable made of ______. copper
Chapter 9 – Workbook Questions
19. If a tree has a crown radius smaller than ______ feet, only one conductor is required.
35
Chapter 9 – Workbook Questions
20. Name three circumstances in which lightening protection for trees might be recommended:
a. b. c.
Historic trees Valuable trees Trees that people may seek refuge under
Chapter 9 – Workbook Questions
Swamp White Oak, City of Lake Forest, Illinois, USA Photo Credit: Natural Path Urban Forestry
