In this study, Rebar of SD500, SD600 is applied to the designed or constructed in domestic underground parking. Analyzed the variation of the rebar according to the strength of the rebar and the construction cost of the change. Most of underground parking appear reduction of Rebar ratio. In this case, the load acting on the underground parking garage is large. So, Rebar placing is dominated by element's stress. Therefore, Large amounts material of slabs, beams and foundations are reduced. In case of columns and wall, Ratio of Material reduction is less than former. Because Splice and Anchorage of rebar amounts are increased and Hoop and horizontal rebar amounts are fixed. Percentage of rebar of the column and wall are 15%. So, Showed a less impact on the reduction of total material.

• 조승호(단국대학교 건축대학 건축공학과 산학협력전담 조교수, 공학박사) | Cho, Seung-Ho Corresponding author
• 주창길(단국대학교 대학원 건축공학과 석사과정) | Ju, Chang-Kil
• 백인관(단국대학교 부설 리모델링연구소 연구교수, 공학박사) | Paik, In-Kwan
• 정란(단국대학교 건축대학 건축공학과 교수, 공학박사) | Chung, Lan