Effects of Fire Compartmentation and Smoke Exhaust Measures on Smoke Spread Caused by Cable Fire in Utility Tunnel

Table 11

Comparison of visibility changes under working conditions 1 and 6.

Time	400 s (m)	500 s (m)	700 s (m)
Working condition 1	16.3	7.0	3.0
Working condition 6	19.8	10.0	5.0