GB 50016-2014 (2018年版) 第5.1.2条
| The fire resistance rating of civil buildings can be classified into Grades I, II, III and IV. For Grade I fire-resistant buildings, the main components (such as load-bearing walls, stairwell walls, and partition walls on both sides of evacuation corridors) shall all be made of non-combustible materials, with fire resistance ratings of not less than 3.00h (load-bearing walls), 2.00h (stairwell walls), and 1.00h (partition walls on both sides of evacuation corridors). For Grade II fire-resistant buildings, the fire resistance ratings of the above components shall be not less than 2.50h, 1.50h, and 0.50h, respectively. The fire resistance rating of hotel buildings (especially high-rise hotels) shall not be lower than Grade II.