1.1 This test method covers the determination of flexural strength of advanced ceramic materials at ambient temperature. Four-pointâ 1 / 4 point and three-point loadings with prescribed spans are the standard as shown in Fig.1.. Scope. 1.1 This test method covers the determination of flexural strength of advanced ceramic materials at ambient temperature. Four-pointâ 1 / 4 point and three-point loadings with prescribed spans are the standard as shown in Fig. 1.