The Analysis of the Natural Smoke Filling Times in an Atrium

Table 1

Fire growth rate for 𝑡-square fires [3].

Fire growth rate	Value of 𝛼 (kW/s^2)	Value of 𝑡𝑔 (sec)
Slow	0.00293	600
Medium	0.01172	300
Fast	0.0469	150
Ultra fast	0.1876	75