Tree Cabling & Bracing
A proper support system takes into consideration where failure could occur, where to add supports based on the type of defect, the diameter of the wood, and if it has decay. Once this is determined and how many cables you need and if bracing rods should be installed for added support, you can select the proper sized gear.
Eye bolts, j lag screws, and through rods range from 3/8 to 7/8 and cable is usually 1/4 or 5/16 (ehs cable with tree grips recommended). Cables should always be installed 2/3 the height from the defect to the top of the tree for proper support. Bracing rods should be staggered, spaced properly above and below the crack (defect), and if there is decay they should go all the way through the tree (through rods). In some cases of large diameter trees, rods should not be staggered and placed in parallel rows.