Page 70 - UL_Report On_Part 1

61 IITGN-UL/Façade 62 IITGN-UL/Façade

18:39:30 Ground floor First floor Second floor

-8.87 min Data acquisition system is started

-7.65 min Ignition of fire through remotely controlled electrical switch

Temperatures reach around 770°C. POP sheets attached
0 min Waste papers and accelerators used to ignite fire manually 26.88 min with deck slab near façade level begin to fail Temp at this level increased to 220°C

0.63 min Max temp was about 218°C Glass façade temp were around 27.08 min Two pairs of glass panel fall out in intact form due to failure of binder.
Flashover occurs during this period. Max temp reached
ambient levels about 800°C(>660°C) which led to melting of frame at certain locations
Video camera stops functioning due to heavy smoke obscuration.
2.63 min Flames begin to reach ceiling. ACP sheets begin to shrink. Temp at first floor level Temp is about 28.5°C
Max temp at ground floor façade level is about 275°C. is about 45.8°C 28.1 min Burning of inner insulation polymer of ACP initiates Max façade temperature is about 400°C
Temperatures become constant at around 250°C for an interval Heavy smoke obscuration; a small secondary fire at ground level
5.63 min of about 10 minutes and fire does not propagate. video cameras stop functioning. Fire reaches first floor level and

30.06 min chars ACP sheets. Fire could not
16.46 min ACP sheet falls due to failure of pressure tape thus increasing Maximum temperature at penetrate inside the compartment
the ventilation. Wooden crib placed in the middle catches fire. first level is about 105°C
Maximum temperature is about 400°C.
33.13 min Fire extinguishing begins Fire extinguishing begins Fire extinguishing begins
24.5 min Another ACP sheet falls. Max temp reached about 610°C Temp at first level is about 115°C
Table 8: Timeline of events at all floor levels during fire Test 2
Major failure of structural fire protection.
24.63 min During fixing of cement boards, c/c spacing between bolts was about 20'',
which has caused early failure.

Max temp at this level
24.63 min Flames begin to leap out through ventilation opening Temp at this level is about 90°C
is about 165°C