Page 81 - UL_Report On_Part 1

71 IITGN-UL/Façade 72 IITGN-UL/Façade

Timeline of events:
Ventilation condition

Similar to Test 2, initial ventilation was provided at ground floor by opening Ignition Source Event1: Time 18:54:00: (-12 min)
one glass panel of the façade. At first floor, 10% door opening was provided Glass and MDF assembly performance subjected to internal ignition source
as initial ventilation with no opening in the façade. No ventilation was was tested. Waste paper placed as fire load in a plastic basket of 15 cm Data acquisition is started and all thermocouples show ambient room temperatures.
provided at the second floor level. Fire was ignited within the compartment diameter and 30 cm height was ignited manually.
and was allowed to grow naturally. As fire progressed, MDF and glass panel Fire load as ignition source – 18.15 MJ. Event 2: Time 18:55:15: (-10.75 min)
failed thereby enhancing ventilation within the compartment which is This ignition fire load failed to ignite other items in the compartment.
depicted through the ventilation factor v/s time plot. (Refer Figure 32) Re-ignition was attempted by placing extra waste papers which then Fire load in form of waste paper placed in small plastic basket near smaller wooden crib is ignited manually. Fire source is placed in proximity to the glass
ignited the nearby wooden crib. This was still insufficient to create flashover and MDF assembly.
conditions until half an hour, after which, another ignition was attempted
through gasoline which eventually caused flashover of the compartment. Event 3: Time 19:06:00: (0 min)
(c) Fire Behavior (Growth, Flashover and Decay)
The timeline of events depicting growth, flashover and decay within the test Fire load placed in the basket is consumed but fails to ignite the crib placed nearby. Flames begin to die out. Re-ignition of the fuel source is attempted for
compartment consisting of glass and MDF assembly subjected to internal about a minute in form of extra waste papers placed in the basket and in its vicinity.
ignition source are listed below.
Event 4: Time 19:08:00: (2 min)

Wooden crib placed near the fire source ignites. Thermocouple TC 94 placed near the crib at the base level show a temperature around 60°C, whereas TC
39 placed at roof level above the crib shows temperature of about 275°C. Temperature at other base locations within the compartment at ground floor level
is around 30°C. Thermocouple TC 74 placed near the beam beneath the cement board shows a temperature of about 23°C thus allowing to maintain
temperatures at lower level. Maximum temperature observed at ground floor façade level is about 63°C, as measured using thermal imaging cameras.
Temperatures at first and second floor level are around ambient levels.

Event 5: Time 19:35:00: (29 min)

Figure 32: Variation of ventilation factor w.r.t time at all floor levels for Test 3 In this duration of 27 minutes, smaller wooden crib placed near ignition source of waste paper basket was completely burnt but failed to ignite the
components within the compartment. During this duration, ground floor façade temperature increased gradually and reached around 250°C. Ground floor
video camera stops functioning. No shrinking of MDF is observed.

Event 6: Time 19:39:00: (33 min)

Ignition of larger wooden crib by gasoline is attempted. Maximum temperature at ground floor level observed through thermal imaging is around 285°C.