PROBLEM TO BE SOLVED: To provide a foundation of a unit building by which the variety of PC blocks can be reduced. ;SOLUTION: A foundation 1 of a unitl building constructed by plural combinations of plane-like rectangular building units 9A, 9B comprises a PC long side block 2 arranged along the long sides of the building units 9A, 9B and a PC short side block 3 arranged along the short sides of the building units 9A, 9B between the long side blocks 2. Thus, the block for the end part which has been arrange in the corner of the building unit heretofore can be omitted so as to reduce the kind of blocks, and in the connecting part between the long block 2 and the short block 3, the long side block 2 prevails so that the length of the short side block 3 is made common in the foundation of one building.;COPYRIGHT: (C)1998,JPO
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