This feature's essential on built-in timbers and timber structures. Because of the long term leak and the fluctuating humidity, fungi and insect can attack the wood and results stability reduction.
Experts evaluate of wooden structures from time to time.
They establish the measure of damage and the fact of timber stability reduction. They make on offer for structural engineer. In this process the data of strength is missing. I worked out a method as a result of intensive research. Using the method we can predict the momentary bending strength of the built-in timber.