Ключевые слова: abstract, access, architectural, architecture, axis, background, circular, climb, compact, construction, corkscrew, curved, descending, descent, design, detail, down, downwards, emergency, empty, engineering, exit, exterior, fire escape, grid, handrail, helical, high, high angle, metal, modern, nobody, pattern, perspective, pole, shape, shiny, spiral, staircase, stairs, steel, steps, strong, structure, style, top, treads, turn, twisting, walk,