Ключевые слова: abstract, apartment, architecture, background, black, brick, building, business, city, concrete, construction, design, down, emergency, entrance, escape, exit, external, fire, floor, interior, iron, ladder, metal, modern, office, outdoor, railing, safety, side, stair, staircase, stairs, stairway, steel, step, steps, stone, structure, texture, up, urban, view, wall, way, white,