Fire Preventive Function of Trees

Critical Radiation to Auto-Ignition of Leaves

Abstract

As to the study on fire preventive function of trees, this paper, as the result of some ignitability tests, shows the critical radiation to auto-ignition of leaves. The critical radia tion is the most important barometer which estimates the fire preventive power of trees.
By means of ignitability test apparatus, it has been observed the radiation limit, and also time and properties of leaves until they come to ignit (anto-ignition).
The critical radiation of leaves are as follows,
evergreen broad leaves tree 13, 450 kcal/m² h
deciduous broad leaves tree 13, 930 kcal/m² h
needle-leaves tree12, 020 kcal/m²h