This is the 17221st most frequent Russian word.
строительном
"Строительном" means "construction" or "building-related" in English (in a contextual or adjectival form).
The word "строительном" here is used as an adjective, describing the type of store—"construction."
В строительном магазине можно найти материалы для ремонта.
In the construction store, one can find materials for renovation.
The word "строительном" functions as an adjective modifying "site," indicating its purpose related to construction.
На строительном участке рабочие строят здание.
At the construction site, workers are building a building.
"Строительном" is employed as an adjective here to describe the type of institute—one focused on construction-related studies.