Topic Especially increasing application efficiency to the occasion where unit building above medium scale such as multiple dwelling house is constructed, be able to compact term of works, it offers the long building unit which it can execute economically. SolutionsOn both shorter side side of building unit itself 1A, installation and removal possible temporary additional strength component 2 is provided respectively, in temporary additional strength component 2, in the bottom salient 3, is made the configuration which is extended in the lower part. Choice figure Drawing 1
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