Ключевые слова: abstract, architecture, at, background, built, business, cement, concrete, construction, contractor, crane, dawn, development, double, engineer, engineering, equipment, exposure, future, ground, hard, hat, helmet, high, home, house, housing, industrial, industry, installation, labor, manual, men, occupation, profession, professional, project, road, safety, scaffold, scaffolding, site, steel, structure, teamwork, work,