The basis of the measurement process is the principle of finding the values ​​of physical quantities empirically, with the help of special technical means, between the measured value and some value received per unit of comparison, with the subsequent establishment of the correspondence between the condition of the object of control and preset standard. In practice, volume of round timber (RT) is measured by one of five methods, differing in models of longitudinal sections. Since automated systems measure the volume of logs with high accuracy, it became possible to compare their real volumes with volumes of the Standard.

The article describes the change water absorption limit across the section and trunk height sap and heartwood of pine trees damaged by strong ground and running crown fire. Results of research of micro-structure of pine wood and recommendations on the impregnation of timber damaged by fire are given.