Pinellas County FL

Cable & Bracing

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Cable and Bracing in Pinellas County, FL

What does cable and bracing mean in tree care langauge?

Note- Cable and bracing should only be done from an ISA Certified Arborist due to many factors.

  • Cabling and bracing are the two most common forms of structural support for trees
  • They involve installing flexible cables or rigid rods to reduce the chances of failure of defective unions.
  • Cables are installed high in the tree, at least 2/3 the distance from the defect to the crown
  • Rods are installed much lower, just above and/or below the defect
  • Cables are always stronger than rods because of their greater leverage
  • Cables can be used alone, but bracing is always supplemented with cables
  • Other, less common forms of structural support are guying and propping
Cable and Bracing In Pinellas County FL

When would you use such a technique?

There are three major uses of cabling and bracing:

  • Prevention: to reduce the chance of failure on a healthy tree with structural weakness
  • Example: a specimen Live oak in good condition but having large limbs with “V-crotches”
  • Restoration: to prolong the existence of a damaged tree
  • Example: a large Sweet Gum that lost one of its leaders in a storm, leaving the others suddenly exposed and vulnerable to further damage
  • Mitigation: to reduce the hazard potential of a tree
  • Example: a picturesque multi-stemmed Cook Island Pine that towers over a picnic shelter
  • Be sure to ask yourself some questions first: ◦Is this a reasonable way to treat this tree, or am I just trying to preserve a tree that is actually at the end of its useful life?
  • How do I justify this expenditure on a single tree? Do I have more pressing needs in my forest?
  • Is the tree basically healthy? Is there enough sound wood to anchor the cable?
  • Do I understand that cabling is no guarantee that failure will not happen?
  • Am I prepared to have the cable inspected annually, then replaced after 7-10 years?

How should it be done?

  • First, choose a certified arborist who is knowledgeable and experienced in this area.
  • There are many important technical aspects to correct cabling and bracing, the strength and material of the hardware, the arrangement of the cables (simple, triangle, box) or rods (single, multiple, etc.), the location, type and size of the entries made into the tree
  • Be sure to specify in writing that “All work and materials shall be in accordance with ANSI, A300 Tree Care Standards (Part 3) — 2000.”
  • Some arborists are testing a recently introduced polypropelene cable system developed in Europe that promises to be faster and less injurious, but it has not yet been included in the ANSI standard.

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