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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

CompositeFloorTest_No1

Table 1. Test Information
Name
CompositeFloorTest_No1
Date
Description

Total mechanical load = 28000 lbs; Code compliant floor construction. Standard upper layer gas temperatures controlled to standard conditions.
Specimen
Four square burners
Ignition
pilot flame
Project ID (s)
Steel-Concrete Composite Floor Systems Subject to Fire, Phase 2
Test Director
Choe

Timelapse Video with Heat Release Rate Plot

Table 2. Summary of Test Results
Measurement Value Uc Unit
Peak Heat Release Rate, PHRR
11,496
587
kW
Time to Peak Heat Release Rate
93.98
0.17
min
Total Heat Released, THR
63,542
3,240
MJ
Natural Gas Burner Total Heat Released, NGTHR
60,985
870
MJ
Heat Release Quality Confirmation, HRQC
 Not measured -
MJ/MJ
Net Specimen Mass (gravimetric), NM = Mi-Mf
 Not measured -
kg
Total Fuel Mass Burned, TFM = THR / HOCf
1,271
75
kg
Net Effective Heat of Combustion = THR / NM
 Not measured -
MJ/kg
O2 Yield = O2 Consumed / TFM
3.71
0.25
kg/kg
CO2 Yield = CO2 Generated / TFM
3.01
0.21
kg/kg
CO Yield = CO Generated / TFM
0.00886
0.00061
kg/kg
Soot Yield = Soot Generated / TFM
 Not measured -
kg/kg
Baseline Hood Exhaust Flow
83.4
2.5
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
107.33
0.03
min

Uc = Combined Expanded Uncertainty with 95% confidence level

Table 3. Summary of Test Input Parameters
Parameter Value Uc Unit
Fuel Type
Natural Gas
 - -
Hood Size
15
 -
m
Effective Duct Diameter
2.424
0.009
m
Exhaust Flow Correction Factor
1.042
0.032
 -
Net Heat of Combustion (per unit mass O2), Ef
12.54
0.50
MJ/kg
Net Heat of Combustion(per unit mass fuel), HOCf
50.00
1.50
MJ/kg
Initial Specimen Mass, Mi (gravimetric)
 Not measured -
kg
Final Specimen Mass, Mf (gravimetric)
 Not measured -
kg
Plot of Fire Heat Release Rate with event markers. Uncertainty bar shown at peak value.
Figure 1. Plot of Heat Release Rate data with event markers and error bars shown at peak.
Table 4. Summary of Observed Test Events
Event Time (min) Description Video Snapshot Image
1
0.00
Ignition
Ignition
2
79.15
water lines steaming
water lines steaming
peak
93.98
Peak HRR
Peak HRR
3
99.32
Task(s) "DAQ Task_25815458" - Failed, data lost
Task(s) "DAQ Task_25815458" - Failed, data lost
4
101.35
Task(s) "DAQ Task_25815458" - Restarted, data realigned
Task(s) "DAQ Task_25815458" - Restarted, data realigned
5
107.33
Fire Out
Fire Out

Table 5. Supplemental Data Plots

Plot of Oxygen Dry Volume Fraction in hood exhaust stream.
Plot of Oxygen Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Dioxide Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Dioxide Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Monoxide Dry Volume Fraction in hood exhaust stream.
Plot of Carbon Monoxide Dry Volume Fraction in hood exhaust stream.
Plot of Radiant Heat Flux data with event markers. r= radial distance from center of hood, h=height above floor.
Plot of Radiant Heat Flux data with event markers. r= radial distance from center of hood, h=height above floor.
Plot of Smoke Laser Extinction Coefficient in hood exhaust stream.
Plot of Smoke Laser Extinction Coefficient in hood exhaust stream.
Plot of Exhaust Duct Mass Flow Rate.
Plot of Exhaust Duct Mass Flow Rate.

Bryant, R. and Bundy, M. The NIST 20 MW Calorimetry Measurement System for Large-Fire Research, Technical Note (NIST TN) 2077, 2019
https://doi.org/10.6028/NIST.TN.2077

NIST Fire Calorimetry Database (FCD)
https://doi.org/10.18434/mds2-2314

Report Process Script Version
NFRL_Report_8.3.4
Last Updated June 7, 2021