GB 51251-2017 第9.2.2条
| **** | When smoke exhaust ducts, pressurized supply air ducts and other ducts penetrate fire compartments, fire walls and floor slabs, they shall be tightly sealed with firestop materials, and fire dampers shall be installed (actuation temperature 70℃ or 280℃). In hotels, particular attention shall be paid to the installation of 280℃ fire dampers where kitchen exhaust ducts penetrate floor slabs. |