Ключевые слова: arch, architectural, architecture, ascent, background, building, chute, colorful, column, descent, design, down, downwards, emergency, escape, exit, exterior, external, fighting, fire, floors, frame, framework, going, health, ladder, legislation, level, metal, outside, pattern, progress, safety, side, sidewall, staircase, stairs, steps, success, support, tall, up, upwards, urban, wall, window,