Individual landscape trees often develop heavy and extended limbs, multiple trunks, or other defects that increase the likelihood of failure. Rather than cutting down a valuable tree, the risk for extensive damage to your tree or to the surroundings can often be reduced cabling and/or bracing.
Cabling supports multiple trunks or heavy limbs by securing them to other parts of the tree high in the canopy. Bracing strengthens the crotch of the tree with steel rods inserted through the tree. Generally, the tree will also be pruned in conjunction with cabling and bracing in order to lessen the stresses on the limb or trunk being protected.
At Woodpecker Tree Care we promote cabling with a non-invasive support called the Cobra tree support system. While somewhat more expensive than the traditional taut steel cables, it allows the tree to maintain its natural strength through continued movement. As well it is meant for the long-term: it can easily be repositioned higher in the canopy as the tree gets taller.
Video of the Cobra cabling system.
All mechanical support systems have their limitations. They should be inspected periodically to detect any wear or damage, and to monitor any changes in the tree.