構 is built from the 木 and 冓 (framework (in 構·講)) components.
It belongs to a phonetic family with 講, 購, and 溝 — they share the 冓 component and the reading コウ.
A common word using 構 is 結構 (けっこう), meaning “splendid; enough, tolerably”.
Don't confuse it with 講, 購, and 溝.