Abstract
After fire in buildings investigators start research. The purpose of it is to find the reason of fire, but this thing can be reliably determined only if the fire origin is fixed. The instrumental fire prognosis for wooden structures is currently the most widely applied method in Lithuania. But the analysis of charring of natural wood specimens and the completed tests have revealed some drawbacks of this method, because the method fails to fully estimate the properties of wood and its protection by fireproofing compounds, the impact of the fire load, etc. The obtained test results will help further resolve the problems of reliability of the above‐mentioned method.
Highlights
In many countries, for the development of low buildings, wood is applied in constructions and roof coverings
The objective of the present work is to show how it is possible to use charring samples for prediction of the onset of a fire, upon reasonable and thorough study of such samples. For this purpose the work contains quite a number of cases, pertaining to the charring rate and depth, unusual charring samples and experimental wood charring researches by aiming to establish certain trends and clear up specifics in examination of fires peculiarities related to the foregoing mater and laboratory tests have been performed, which tests used the standard and maximum natural fire conditions enabling to estimate the fire impact duration, the charring rate (E) and the effect of other parameters by analysing test specimens of various kinds of natural wood and its samples impregnated with fireproofing compounds (,Flamasep and,BAK 1)
In order to determine the difference of the charring rates of various sorts of wood protected and not protected with fireproofing compounds and their effect on the final forecast result, special equipment was used for one-side heating of the structures according to reference source [21, 22]
Summary
For the development of low buildings, wood is applied in constructions and roof coverings. The objective of the present work is to show how it is possible to use charring samples for prediction of the onset of a fire, upon reasonable and thorough study of such samples For this purpose the work contains quite a number of cases, pertaining to the charring rate and depth, unusual charring samples and experimental wood charring researches by aiming to establish certain trends and clear up specifics in examination of fires peculiarities related to the foregoing mater and laboratory tests have been performed, which tests used the standard and maximum natural fire conditions enabling to estimate the fire impact duration, the charring rate (E) and the effect of other parameters by analysing test specimens of various kinds of natural wood and its samples impregnated with fireproofing compounds (,,Flamasep and ,,BAK 1)
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