Assessing the Impact Resistance of Roof Steel Plates to Windborne Debris

This research aims to assess the impact-resistant performance of cladding materials, such as roof steel sheets, against windborne debris. Countries like the United States and Japan, prone to hurricanes and typhoons, routinely conduct impact tests on exterior materials. Korea, facing damage from typhoons and strong winds, also requires evaluating impact resistance through missile tests. This study develops test equipment based on international standards, establishes a test method, and conducts impact resistance tests on roof steel plates. Following these tests, penetration occurred when a missile of type D or higher struck the non-overlapping 0.35mm thick steel plate. At overlapping points, an impact with a missile of type E was applied to the 1.5 furrow part. In earlier findings, adjusting bolt spacing from 200mm to 100mm at overlapping points prevented penetration, even during a missile impact of type E.