What the hardware does
The International Society of Arboriculture describes cabling and bracing as ways to support trees with structural weaknesses, often trees that are valuable and would be expensive to lose. Two kinds:
| Hardware | Where | What it is for |
|---|---|---|
| Cable | High in the crown, between two stems or limbs | Limits how far they can move apart in wind |
| Brace rod | Through the trunk, near or below a fork | Holds a weak union together |
Neither makes a tree stronger. They share the load so that the weak point is not carrying all of it, and they are usually paired with pruning that takes weight off the ends of the limbs.
Trees it suits
- A large oak or maple with two stems of the same size rising from one point and bark caught between them: the classic candidate.
- A long, heavy limb over a roof that an arborist would rather support than remove.
- A tree that has been sound for decades and that you want to keep near the house.
Trees it does not
- A trunk that has already split down from the fork. The wood has failed; see Split trunk.
- Decay at the base, a hollow trunk, or fungus on the roots.
- A tree whose root plate is lifting; see Leaning tree.
- A tree that is dying.
Afterward
The tree keeps growing around the hardware. Cables slacken or tighten, and anchors can be overgrown or pull out. Ask the arborist when to have it inspected, and keep the paperwork with the house records so a future owner knows it is there.
Checked against the sources below on 2026-10-11.