CIP RC/PT Girder groups commonly used data together in the form of component libraries. The component libraries are used to store data not susceptible to change and able to be used in projects repeatedly.CIP RC/PT Girder has a set of default component libraries for mild steel reinforcement, vehicles, and post-tensioning tendons. The individual libraries can be saved as individual files, each containing different items. For example, you may customize the rebar component library and save it as MyRebar.shlib. Then you may load the file MyRebar.shlib into the library of a different project file in order to share the contents of customized rebar component library.