Abstract
Rem Koolhaas's works have an intention to present the feature of bigness with structural issues and have shown various different ideas using structures. In this study, therefore, the composition of structure members, scale, arrangement and structural systems were investigated in Rem Koolhaas's works, and the structure design methods that are related in his main design concepts was presented. Although his works imply an impression structural difficulties, it was investigated that most of structures in examples have comparatively simple arrangement, span and the flow of vertical force in basic. It was also found that the structure design methods: combination of the relation between architectural elements and structural elements, partially irregular arrangement of columns, mega-truss system, variation of rigidity in structural members, formative arrangement of stability members were mainly used in his work's to present his design intention.