Ключевые слова: architectural, architecture, beam, blue, bridge, cast, city, concrete, construction, crossbeam, design, detail, empty, engineering, floor, form, frame, framework, girder, gray, grey, highway, industrial, industry, iron, light, metal, modern, outdoor, pedestrian, perspective, project, rivet, road, site, sketch, span, steel, strength, strong, structural, structure, support, technology, transport, transportation, triangle, truss, urban,