Building Act Article 8

The “main structure of buildings” mentioned in this Code refers to the structure of foundation, main beams and columns, bearing walls, floor slab, and roof structures.
中文原文 建築法第8條
本法所稱建築物之主要構造,為基礎、主要樑柱、承重牆壁、樓地板及屋頂之構造。

English translation for reference only; the Chinese text prevails. Not legal advice.