Ключевые слова: ascending, balustrade, business, comfortable, construct, construction, corporate, decor, decorated, empty, entrance, evacuation, exit, fast, flight, floor, go, hall, handrail, high, house, hurry, indoor, interior, ladder, many, metal, modern, motion, move, moving, office, place, railing, space, staircase, stairs, stairway, stairwell, step, stone, stove, style, stylish, upstairs, walk, walking, way, window, work,