The Burning Rate of Complex Materials

Therefore, if this flame heat flux does not appreciably change, reasonable for a vertical surface, from Equation (9.80) 

Accordingly, at a water application of 5.2 g/m2 s (0.0076 gpm/ft2), the critical (minimum) external flux to allow the flame to survive is 

A burning rate of common materials and products in fire can only be specifically and accurately established through measurement. Estimates from various sources are listed in Table 9.4. Also, oxygen consumption calorimeters are used to measure the energy release rate of complex fuel packages directly. In most cases, the results are a combination of effects ignition, spread and burning rate. 

A0 = cross-sectional area of the vertical crib shafts 

it is found that the time-average burning rate can be represented by 

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