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NOTE: This is an unformatted excerpt from our online fire protection training library.

Nature of Smoke

Visibility through Smoke

Smoke Optical Density

Visibility is related to the smoke optical density and the target being viewed by the following equation:


Recommended values of proportionality constant for visibility relation (Based on Research of Jin 1974, 1975, 1985Jin 1974, 1975, 1985:
Jin, T. 1974. Visibility through fire smoke. Main Reports on Production, Movement and Control of Smoke in Buildings, pp. 100-153. Japanese Association of fire Science and Engineering.

Jin, T. 1975. Visibility through fire smoke. Report of Fire Research Institute of Japan 5(42): 12-18.

Jin, T. 1985. Irritating effects of fire smoke on visibility. Fire Science and Technology 5(1), Sept. ):

Situation K Illuminated signs 6 Reflecting signs 2 Building components in reflected light 2
NOTE: This is an unformatted excerpt from our online fire protection training library.

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