Classified by structure or by load-carrying capacity, form ties hold wall forms at the proper distance to create the desired wall thickness. Article discusses the characteristics, applications, and tension load capacities of both one-piece and internally disconnecting tie systems. One-piece ties, also called through ties because the rod extends through the wall and both form sides, are available in a number of different types and in load capacities ranging from 2,000 to 70,000 pounds. Internally disconnecting ties have reusable end bolts that unscrew from the inner tie-rod member, which stays in the concrete. Load capacities range from 4,500 to 64,000 pounds. DEALING WITH TIE HOLES Since patching tie holes can be labor intensive, article also explains how costs can be trimmed by making tie holes a part of the concrete surface pattern and leaving them exposed. Some alternative tie materials are designed to improve finishing economy.