| 摘要 |
PROBLEM TO BE SOLVED: To provide a building close to a circular arc by forming the outside surface contour in a triangular pole shape, forming a triangle forming this triangular pole shape in an isosceles triangle shape, and setting a first corner sandwiched by the equal sides to an angle almost equal to properly equally divided acute angles. SOLUTION: A unit building U is composed of two rectangular solid-shaped building units 1 and three triangular pole-shaped building units 2. The building units 2 are an isosceles triangle shape having an apex angle 21, and are a triangular pole shape in the outside surface as a whole. In this unit building U, the apex angles 21 of the triangular pole-shaped building units 2 are butted against the recessed corner part where the building units 1 are installed by two units so that the triangular pole-shaped building units 2 are installed by juxtaposing the number being an almost right angle by these apex angles 21, that is, three units. Thus, the almost right-angled recessed corner part for assembling a rectangular solid-shaped building unit can be effectively used, and even if a site is a circular arc shape, it can be effectively used.
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