鉄骨 てっこつ構造 こうぞうではありませんでした
tekkotsukōzo udewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 鉄骨構造

1. Was not a steel frame structure.; Was not of steel frame construction.

Past/Perfective
Negative
Polite
Formal Register