GB 51251-2017 第4.1.3条
| **** | For public buildings (including hotels) and industrial buildings with a building height greater than 50 m, the mechanical pressurization air supply systems for their smoke-proof stairwells, independent vestibules, shared vestibules, fire elevator vestibules, and refuge floors (rooms) shall adopt a **vertical sectionalization** scheme, and the service height should not exceed 100 m. |