Cabling gives strength and support to otherwise dangerous or fragile tree growth conditions.

When coming across a tree with a V shaped crotch, and there is some uncertainty as to the strength of this section of the tree, rather than remove this section some would have a better piece of mind to cable it together. Lag hooks or rods should be inserted into the branches at least 4" in diameter and to a depth of two-thirds of the diameter of the limb. The exact size selected is governed by the amount of stress and size of the branches. Holes about 1/16 inch smaller than the hooks are bored at the proper anchorage points, and the hooks are screwed in just far enough to allow the cable to be slipped over the open ends. After the lag hooks are in place, the limbs are pulled together sufficiently so there isn't any slack in the cable after it is hooked on, but they are not pulled tight. A thimble is inserted over the hook and cable is then passed through and spliced to form a permanent union between the two anchors. All spliced areas should be covered with a metal preservative. Cabling systems should be checked every 5-10 years.