軽量 けいりょう鉄骨 てっこつじゃありませんでした
keiryō tekkotsuja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 軽量鉄骨

1. It was not lightweight steel frame.; It wasn't a lightweight steel structure.

Past/Perfective
Negative
Polite
Terminal Form