A45 ・ story RC building , where pre ・ 。ast cencrete mernbers were ernployed for its outer 丘ame as well as inside colurnns and bearns , were constuCtion , and the estirnate equadon of the opcration standard time was examined with its construction data . As a resu 監 ち the f[) nowing conclusions were obta ed . 1) In this measuremen ち the installation time of the pre −cast member in the top f監 oor has decreased to 39 . 4-63 . 8% compared with that in the且oor . 2)In the construction of the high − rise RC building , the reasoll f () r the reduction in sta置 1ation of th巳 pr巳 ・ cast Golumn and the pre − cast bearn from a lower fioor tO the upper depends on both the imprevement of werke ゼ s capability and the Ghange i 皿 丗 e work di伍 cult } , . 3) The change in the 軟) tal mean operation time by repeating work 血 high・ rユ se RC bu 胴 ings can be estimated with 血 e logarithln model ofthe leam 藍 ng engineering . Howeve ら it is necessary to consider the change in the work di伍 culty for evaluation of the insta 艮 1ation time ofp 鵜 ・ Gast menibers in high − rise RC buildings .
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