Ключевые слова: access, activity, architecture, blue, building, building activity, built structure, city, clean, complexity, construction, construction equipment, construction site, day, daylight, development, elevated, engineering, equipment, framework, girder, growth, height, industry, installation, laboratory, levels, maintenance, metal, no people, occupation, outdoors, progress, railings, safety, scaffolding, scaffolds, security, site, sky, stairs, steel, strength, structure, sunlight, support, tower, urban, work, working,