| 摘要 |
PURPOSE: A tubular structure is provided to form a large pipe and passages having a section area without a scaffold supporting side members of the pipe. CONSTITUTION: A tubular structure comprises sections. The sections are horizontally disposed and are supported by a compact laying surface(61). Each section is formed of parallel wall members and comprises side members(2,2') on the laying surface. A bottom plate(7) is provided in each side member. The bottom plate comprises two or more flanges(71,72). The flanges are horizontally extended from a side wall(20) of the member in the form of a bracket. Each side member has a vertical lower part(26). |
