軽量 けいりょう鉄骨 てっこつじゃなかったです
keiryō tekkotsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 軽量鉄骨

1. Wasn't light steel frame.; Wasn't a light steel structure.

Past/Perfective
Negative
Polite
Casual Register