Ключевые слова: architecture, background, black, build, buildingindustry, business, concrete, construct, construction, constructional, development, employment, empty, engineer, engineering, equipment, exterior, frame, handrail, house, housing, industrial, industry, infrastructure, iron, large, maintenance, material, metal, old, pattern, pipes, platform, project, renovation, safety, scaffold, scaffolding, scaffolding isolated, site, staircase, steel, step, strong, structure, support, tool, work, worker, workplace,