軽量 けいりょう鉄骨 てっこつ構造 こうぞうじゃなかったです
keiryō tekkotsu kōzōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 軽量鉄骨構造

1. Wasn't a lightweight steel structure.

Past/Perfective
Negative
Polite
Casual Register