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Engineering Laboratory / Fire Research Division

National Fire Research Laboratory

CLT_Room_Test_1-6

Table 1. Test Information
Name
CLT_Room_Test_1-6
Date
Description

Furnished room with 3 layers of type X gypsum on 3 walls. Wall 1 and ceiling is exposed CLT. Narrow door opening
Specimen
furnished studio apartment, CLT wall and ceiling
Ignition
natural gas burner
Project ID (s)
Cross Laminated Timber Compartments
Test Director
Hoehler

Timelapse Video with Heat Release Rate Plot

Table 2. Summary of Test Results
Measurement Value Uc Unit
Peak Heat Release Rate, PHRR
12,910
771
kW
Time to Peak Heat Release Rate
10.38
0.17
min
Total Heat Released, THR
78,200
4,729
MJ
Natural Gas Burner Total Heat Released, NGTHR
24.97
0.36
MJ
Heat Release Quality Confirmation, HRQC
below detection limit
0.000
MJ/MJ
Net Specimen Mass (gravimetric), NM = Mi-Mf
 Not measured -
kg
Total Fuel Mass Burned, TFM = THR / HOCf
3,930
459
kg
Net Effective Heat of Combustion = THR / NM
 Not measured -
MJ/kg
O2 Yield = O2 Consumed / TFM
1.56
0.19
kg/kg
CO2 Yield = CO2 Generated / TFM
2.09
0.26
kg/kg
CO Yield = CO Generated / TFM
0.0161
0.0020
kg/kg
Soot Yield = Soot Generated / TFM
 Not measured -
kg/kg
Baseline Hood Exhaust Flow
95.1
2.9
kg/s
Test Duration = Time(Fire Out) - Time(Ignition)
192.53
0.03
min

Uc = Combined Expanded Uncertainty with 95% confidence level

Table 3. Summary of Test Input Parameters
Parameter Value Uc Unit
Fuel Type
Cellulose, Plastic
 - -
Hood Size
15
 -
m
Effective Duct Diameter
2.424
0.005
m
Exhaust Flow Correction Factor
1.000
0.029
 -
Net Heat of Combustion (per unit mass O2), Ef
13.10
0.66
MJ/kg
Net Heat of Combustion(per unit mass fuel), HOCf
19.90
2.00
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
9.83
room flashover
room flashover
peak
10.38
Peak HRR
Peak HRR
3
159.92
suppress
suppress
4
192.53
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_8.3.3
Last Updated May 14, 2021