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NIST TN 2327r1
May 2025
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The trees were ignited using a hexagonal-shaped, natural gas burner at the base of the tree (see Section 2.5.1). The trees were allowed to burn until flames and smoldering self-extinguished.


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N
Strong Wall
NW Column I
3 m Radius
West Column I
+
I East Column
13.8 m
2 m Radius
15.4m
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Tree
+ Hood/Tree Center
Hood Structure Outline
Strong Floor Attachment Points
I Vertical I-beam
Cooled Heat Flux Gauge
Plate Thermometer/Gas Thermocouple
Video Camera
Still Camera
Light
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Figure 2. A scale plan view drawing of the area under the 13.8 m × 15.4 m canopy hood showing instrumentation locations.
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2.2 Specimens
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Table 1 lists the details of each tree used in this study, including dimensions, mass, and moisture content (MC). Three pairs of trees were selected for study based on their height, which was roughly 4 m (Trees 1 and 2), 4.5 m (Trees 3 and 4), and 6 m (Trees 5 and 6). Although there was


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6
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