The tallest sectional height of an unsupported spiral staircase measures 11.995 m (39 ft 4.244 in)and was achieved by Guangdong Marubi Biotechnology Co., Ltd. (China) in Guangzhou, Guangdong, China, on 26 December 2025 ---------------------------------------------------------------------------------------------- At Guinness World Records we want to show that everyone in the world is the best at something, and we’re here to measure it! Whether you’ve got the stretchiest skin, know the world’s