Cabling, Bracing, and Support Flashcards

What is the recommended minimum cable installation height as a percentage of the distance between the attachment points?

Answer: Two-thirds of the distance between crotch and branch tips

ANSI A300 guidelines specify that cables should be installed at approximately two-thirds of the distance between the crotch and the branch tips.

Which rod type is most commonly used for tree bracing applications?

Answer: Solid galvanized steel threaded rod

Solid galvanized steel threaded rods are the industry standard for bracing because of their strength and corrosion resistance.

A 'box' cabling system is most appropriate when:

Answer: Three or more co-dominant stems require mutual support

A box (or triangulated) system interconnects three or more co-dominant stems so each one supports the others, distributing load across the group.

What is the primary purpose of installing a brace rod through a split or crack in a tree?

Answer: To prevent the crack from extending further under load

Brace rods mechanically close and stabilize cracks, preventing the fracture from propagating when the tree is loaded by wind or weight.

When inspecting an existing cabling system, which finding indicates the cable should be replaced immediately?

Answer: Broken wires or corrosion throughout multiple strands

Broken or heavily corroded strands significantly reduce cable load capacity and present an imminent failure risk requiring immediate replacement.

What is the term for the hardware used to attach a static cable to a tree limb or trunk?

Answer: Eye bolt

Eye bolts are threaded through the wood and secured with nuts and washers to anchor static support cables.

Which condition would make a tree LEAST suitable for cabling or bracing intervention?

Answer: A tree with advanced decay in the stems to be cabled

Advanced decay severely reduces the wood's ability to hold hardware, making cabling or bracing ineffective and potentially dangerous.