Abstract
Aluminum alloy material has been used in space structure as roof with advantage of the lightness, durability and strength. However, aluminum alloy structure were applied to very few buildings which have flat floor for human activity. This small house introduced herein is almost the first aluminum building for the individuals living in Japan. Both characteristic structures of panel wall and dual (cover and core) members column are usde in the system. The surface of wall is exposed for Finish and the cover members of columns are functioned as sash frames of doors and windows. The synthesization of structural and architectural members create a new spacial expression.