noun
Technical term in architecture and engineering for a structural framework or skeleton. Not an everyday word for a simple frame.
この建物の架構は鉄骨でできている。
The framework of this building is made of steel.
橋の架構を設計する。
Design the framework of a bridge.
Compound of 架 (erect, construct) and 構 (structure, framework). The exact historical derivation is uncertain, but the kanji combination directly suggests a constructed framework.