GB 51251-2017 第4.2.4条
| **** | In spaces within the hotel such as lobbies and ballrooms with a **clear height greater than 6 m**, the **maximum allowable length of the long side** of each smoke control zone is 60 m; when the clear height is 3 m to 6 m, the maximum allowable length of the long side is 36 m; when the clear height is less than 3 m, the maximum allowable length of the long side is 24 m. |