With increase in demand of construction industry, man has developed various techniques of construction. Post-installed connection is one of the techniques which allows to extend or strengthen the structure without affecting the existing structure. The technology of post-installed reinforcing bars is gaining importance since these bars are being frequently used in horizontal, vertical, and overhead applications in retrofit and rehabilitation of structures. Design of post-installed rebar connection is an issue as proper design guidelines are not yet provided in IS codes. Proper design of anchorage length is important parameter in post-installed connection. Post installed rebar connections, Eurocode approach to design, post-installed reinforcement approval and design method for static loads are discussed. The main aim of the study is to design post-installed rebar connections for existing structure. We have also carried out analytical investigation using finite element method to check the effect of post-installed connections by varying anchorage length as 10d, 15d, 20d and compared the effect with actual designed anchorage length for static loads. Behavior of structure after post-installed connection under static loading is studied. © 2019 IJSTR.