Objective: To control the smoke in a certain range and improve the smoke exhaust effect (gathering and centralized smoke exhaust); According to the design requirements of building functional partition and smoke exhaust system, smoke prevention partition can be divided, and the part without smoke exhaust facilities (including basement) can not be divided.

When the space clear height is less than 3m, the maximum allowable area of smoke-proof partition wall should not be greater than 500m2; When 3m