Cabling Bracing and Support Systems 1 Flashcards
6 cards from real Certified Arborist Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Cabling Bracing and Support Systems 1 flashcards as text
What cable material does the ISA specify as the standard for static high cabling installations in trees?
Answer: Galvanized Extra High Strength (EHS) wire rope
ISA Best Management Practices specify Galvanized Extra High Strength (EHS) wire rope for static cabling systems because of its superior tensile strength, corrosion resistance, and long service life compared to alternatives.
According to ISA Best Management Practices, how frequently should installed cabling and bracing systems be inspected?
Answer: Annually and after any significant storm or loading event
ISA guidelines recommend annual inspections of cabling and bracing systems, with additional inspections following major storms, because hardware can corrode, cables can lose tension, and the tree's growth can alter load dynamics over time.
When a cabling system is installed on a tree with co-dominant stems, what complementary pruning practice is most commonly recommended to reduce stress on the cable?
Answer: Performing crown reduction on the supported stem or limb
Crown reduction of the supported stem decreases its weight and wind-sail effect, directly reducing the dynamic load transferred to the cable and anchoring hardware during storm events.
What is the primary structural advantage of a triangulated (three-point or multi-point) cabling system over a simple two-point system?
Answer: It distributes loads in multiple directions, resisting movement from any compass point
A triangulated system ties three or more stems together so that lateral loads from any direction are shared across multiple cable runs, whereas a two-point system only resists movement in the plane of the single cable.
What is the purpose of a turnbuckle included in a static cabling system?
Answer: To adjust and set cable tension during and after installation
A turnbuckle provides a means to tension the cable to the specified tautness at installation and to re-tension it during subsequent inspections as the tree grows and hardware seats into the wood.
Which condition most clearly indicates that a threaded brace rod is needed in addition to, or instead of, a cable alone?
Answer: A longitudinal crack or split in the stem that allows the two sides to move apart laterally
Brace rods are designed to resist the splitting or spreading of a cracked stem by passing a threaded rod through both sides and securing it with washers and nuts; cables address vertical or lateral tip movement but cannot hold a splitting stem together.