Fire Safety Science Digital Archive

Wood blocks of the kind used to make measurements at the Flambeau test fire 760-12-67 have been calibrated using a skewed pulse of radiation approximating to that measured in similar previous fires. The relation between damage sustained by the blocks and peak intensity were broadly similar to those for a constant intensity pulse except that with a skewed pulse having a peak intensity of about 2 W/cm^2 the behaviour of the block was more variable. The data obtained at the recent Flambeau fire 760-12-67 have been re-examined in the light of these new calibrations. The variation of peak intensity over the fire area was closely similar to that previously obtained when the incident intensity was assumed to be constant for a period of 20 min. Correlations were found, as before, between the peak intensities at various positions in the 'streets' between the fuel piles.