PROBLEM TO BE SOLVED: To provide a unit house to be reduced in size during transport and enlarged and regulated size at a job site. ;SOLUTION: In a unit house, a column 1, a ceiling beam 2, a ceiling girder 3, an intermediate beam 4, an intermediate girder 5, a floor beam 6, and a floor girder 7, of which a skeleton consists, form double structure of inner and outer cylinders and expandable. Middle girders 9 and 10 spanning respective beams also form double structure of inner and outer cylinders and are brought into an expandable state. This constitution freely changes size, fits lock hooks 13a and 13b in a hook hole during spanning of the middle girder 9. This constitution improves workability.;COPYRIGHT: (C)1999,JPO
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