This paper presents experimental. analytical and numerical study of impact perforation of steel plates with the aim to develop the procedures to assess the perforation of steel against tornado-generated missile impact. In the experiment. flat plates of SS400 steel and SUS304 stainless steel were perforated by a square pipe with cross section 200 x 300. https://www.thegreensjunglebeautyshops.shop/product-category/kids-sweater/