2.6. Three-Point Bending Test

The three-point bending test based on ASTM D143-22 is one of the basic experiments carried out on building materials [24]. The test was carried out on a universal test machine according to the scheme and photography in Figure 6. It was Formtest 300 kN (Seidner & Co. GmbH, Riedlingen, Germeny). The span of the supports was 180 mm. A displacement sensor was placed directly under the load panel. The force and deflection were recorded on the machine. These values were then plotted on a graph, and other properties were calculated.

Wood sample in the machine before the experiment (bottom), scheme of the test (top).