Study on Evacuation Evaluation in Subway Fire Based on Pedestrian Simulation Technology

Table 6

Human tolerance limits to fire products.

Content	Human tolerance limits
Radiation heat flux	2.5 kw/m^2
Gas temperature	When the smoke layer height >2 m, 180°C
	When <2 m for 30 min, 60°C
Visibility	When the smoke layer height <2 m, 0.1 m (10 cm)
Toxic gas	CO concentration achieves 0.25%