Deflections of reinforced concrete slabs increase by reduction of flexural rigidety and steel slippage at the fixed edge caused by cracking, and it increase furthermore with time by bond-creep between bar and concrete. Calculation method for long-term deflections in consideration of such characteristics were suggested, but those methods don't satisfy both accuracy and practicality. In the present study, we suggest the practical calculation method for long-term deflections based on bond-creep characteristic. The validity of this method was confirmed by the comparison with accurate calculation and experimental results, and the availability as a practical calculation method for long-term deflections was shown.
