軽量 けいりょう鉄骨 てっこつではありませんでした
keiryō tekkotsudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 軽量鉄骨

1. Was not lightweight steel frame.; Was not a lightweight steel structure.

Past/Perfective
Negative
Polite
Formal Register