Ключевые слова: architecture, assembly, backgrounds, beam, building, building exterior, built structure, composition, construction, construction industry, construction material, construction site, design, detail, engineering, exterior, frame, galvanized, home, house, image, industry, iron, material, metal, pattern, prefabricated, project, property, purlin, rafter, real estate, residence, roof, roof beam, site, sky, steel, steel purlin, structure, technology, truss, truss roof, work place,