Typhoon 1721 occurred on October 16th, going south of Japan from October 21st to 22nd, and around 3 o’clock on 23rd, landed around Shizuoka Omaezaki city. The central pressure of typhoon 1721 at landed was 950 hPa, then the maximum wind speed near the center was 41.2 m/s. In this report, wind speed and direction observation records obtained from an anemometer installed in a truss tower supported steel chimneys are summarized, the dynamic characteristics of the chimneys are evaluated based on the record of the accelerometer, and the results are reported.
