台風7705号による被害について

Abstract

The typhoon 7705 struck Ishigaki Island and Iriomote Island in the early morning on July 31, 1977. The maximum wind speed observed at the Ishigakijima Weather Bureau is 53 m/sec andthe maximum peak gust is 70.2 m/sec. The number of the destroyed houses are 449, and thetotal amount of damages are more than 6 billion yen. The wind speeds estimated from the damagesare 60-90 m/sec in the Ishigaki City. The damages to the roofs and the window glass panes aredistinct and the roofing practice and the choice of glass thickness must be taken into considerationin the future wind-resistant structure design in Okinawa Islands.