- Using Table 8.6 in Fire Dynamics, calculate the effective heat transfer coefficient of 1/4 inch 0.25 gypsum wallboard if it has been exposed to a fire for 60 seconds.

-Using Table 8.6 in Fire Dynamics, calculate the thermal inertia of polyurethane foam.

-Using Table 8.6 in Fire Dynamics, calculate the thermal diffusivity of glass.

TABLE 8.6 Thermophysical Properties of Common Materials THERMAL CONDUCTIVITY k(W/M-K) MATERIAL Copper Steel 7850 Brick Concrete Glass Gypsum plaster PPMA Oak DENSITY SPECIFIC HEAT THERMAL INERTIA p[kg/m) Cp /kg-K) kpc(W's/m?) 387 8940 380 1.30 x 10 45.8 460 1.65 x 10 0.69 1600 840 9.27 x 105 0.8-1.4 1900-2300 880 2 x 106 0.76 2700 840 1.72 x 10 0.48 1440 840 5.81 x 105 0.19 1190 1420 3.21 x 105 0.17 800 2380 3.24 x 105 0.14 640 2850 2.55 x 10 0.15 577 1050 9.09 X 10^ 0.041 229 2090 1.96 X 10^ 0.034 20 1400 9.52 x 10 0.026 1.1 1040 2.97 x 10' Source: Data derived from Drysdale (1999). An Introduction to Fire Dynamics. New York: Wiley. p. 33; and from Table 2.2. Thermal Character. istics of Common Materials found at Fire Scenes, in love and DeHaan (2008), Forensic Fire Scene Reconstruction, Second Edition. Upper Sad. dle River, NJ: Brady/Prentice Hall, Yellow pine Asbestos Fiberboard Polyurethane foam Air Chapter 8 Ignition 161