Selecting the first point [selecting the closed line (S)/ multi-nozzles (D)] actually lets you choose the nozzles in the protected area. You can enter d and then select the nozzle, or you can enter s to select the pre-drawn PL wireframe.
Design flow of spray water for a class of high-rise public buildings: two sets of automatic spray systems are designed for a garage, and the clearance height is ≤8m 1. According to the spraying specification P 10, the spraying strength is 8L/min. Action area: 160_ flowing water consumption Q= spraying intensity * action area = 8 *160/60 = 21.33l/S2. According to P 140 of the second edition of Drainage Design Manual, the designed water consumption for self-injection is 1.3q = 20.