WIND DAMAGE TO BUILDINGS CAUSED BY A SPOUT(TATSUMAKI) IN NATORI CITY ON SEPTEMBER 16,1998

Abstract

This paper presents the characteristics of the building damage caused by a spout (Tatsumaki) in Natori City, Miyagi Prefecture, on September 16, 1998. A questionnaire was given to all residential houses located in the stricken area of approximately 100m by 500m. The dependence of the damage rate on various factors was investigated; the factors under consideration are the roof shape, roof pitch, cladding material, ridge direction relative to the path of the spout, and the age of the house. It is found that hip roof houses were less severely damaged than gable and mono-sloped houses. Furthermore, the results indicate that the roof slope minutely affects the damage rate.