There are a few circumstances or reasons why you may decide to install a cable in a tree. When trees are young, they may need to be trained to grow in a particular direction or straightened up if they start leaning unnaturally. On other occasions, a dynamic, non-invasive cable with shock- absorbing material may be installed in trees that require weighty branches or multiple leaders or stems to be supported. Static steel cables can be installed where trees are required to move independently. These cables are installed loosely in the tree, and they are simply there as a safety mechanism to protect buildings, or assets, on the occasion where a failure has the potential to occur on a particular tree branch, leader, stem or the entire tree.