Attached sheet: 1. The frequency of the first and second grade timber according to CNS13826 standard was higher than that of CNS1463I standard. 2. Except the third grade timber, the standard deviation and variation coefficient of the strength property according to CNS13826 standard were smaller than those of CNS14631. 3. After using visual grading method, the difference between different grades of Taiwania timber could be established. Therefore, visual grading method was useful in timber grading.