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 Engineering Laboratory /                  Fire Research Division
      National Fire Research Laboratory


    Breadcrumb
    Fire Calorimetry Database (FCD)
          Steel-Concrete Composite Floor Systems Subject to Fire, Phase 1CB-42-DA-4MW

      Table 1. Test Information
        Name
            CB-42-DA-4MWDate
            12/19/2017 5:21:58 AM ESTDescription
            Loaded 42 ft composite beam floor test with 3 natural gas burners ramp to 4 MW over 10 min. 3 x 4000 lbs point load.  Double angle steel connection to column.Specimen
            Three box burnersIgnition
            pilot flameProject ID (s)
            Steel-Concrete Composite Floor Systems Subject to Fire, Phase 1Test Director
            ChoeDownload CSV data file

      Timelapse Video with Heat Release Rate Plot
  Your browser does not support the video tag.Table 2. Summary of Test Results
        Measurement
          Value
          Uc
          UnitPeak Heat Release Rate, PHRR
            4,182
            216
            kWTime to Peak Heat Release Rate
            14.77
            0.17
            minTotal Heat Released, THR
            10,980
            576
            MJNatural Gas Burner Total Heat Released, NGTHR
            10,772
            154
            MJHeat Release Quality Confirmation, HRQC
            Not measured
            -
            MJ/MJNet Specimen Mass (gravimetric), NM = Mi-Mf
            Not measured
            -
            kgTotal Fuel Mass Burned, TFM = THR / HOCf
              220
              13
              kgNet Effective Heat of Combustion = THR / NM
            Not measured
            -
            MJ/kgO2 Yield = O2 Consumed / TFM
            3.64
            0.25
            kg/kgCO2 Yield = CO2 Generated / TFM
            2.92
            0.21
            kg/kgCO Yield = CO Generated / TFM
            0.01199
            0.00084
            kg/kgSoot Yield = Soot Generated / TFM
            Not measured
            -
            kg/kgBaseline Hood Exhaust Flow
            80.8
            2.4
            kg/sTest Duration = Time(Fire Out) - Time(Ignition)
            67.92
            0.03
            min*Uc = Combined Expanded Uncertainty with 95% confidence level*

      Table 3. Summary of Test Input Parameters
        Parameter
          Value
          Uc
          UnitFuel Type
            Natural Gas
            -
            -Hood Size
            15
            -
            mEffective Duct Diameter
            2.424
            0.009
            mExhaust Flow Correction Factor
            1.042
            0.032
            -Net Heat of Combustion (per unit mass O2), Ef
            12.54
            0.50
            MJ/kgNet Heat of Combustion(per unit mass fuel), HOCf
            50.00
            1.50
            MJ/kgInitial Specimen Mass, Mi (gravimetric)
            Not measured
            -
            kgFinal Specimen Mass, Mf (gravimetric)
            Not measured
            -
            kgPlot 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 Image1
  -87.45
  data sync marc
  data sync marc
  2
  -84.20
  start loading floor beam ramp ofr 15 m and hold for 15 m at 12 kips over 3 points
  start loading floor beam ramp ofr 15 m and hold for 15 m at 12 kips over 3 points
  3
  -25.12
  hold loading at 24 kips- spread over  6 points
  hold loading at 24 kips- spread over  6 points
  4
  0.00
  Ignition
  Ignition
  peak
  14.77
  Peak HRR
  Peak HRR
  5
  30.62
  load decreased
  load decreased
  6
  35.40
  starting cooling phase - ramp burner off over 30 min
  starting cooling phase - ramp burner off over 30 min
  7
  67.92
  Fire Out
  Fire OutTable 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, 2019https://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 8, 2021
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