Portland OR Tree Cabling ServiceSome trees have steep or weak branch unions, which are prone to tearing or splitting. We install cables, either wrapped around the limb (a noninvasive method called dynamic cabling), or in the case of very heavy loads bolted into the limbs. The bolts cause less harm than would bad pruning. The cables are set at medium tautness, which lets the tree move in the wind, but under most conditions prevents it from breaking or tearing.