CSSBI - Canadian Sheet Steel Building Institute - Canada's Essential Resource on Sheet Steel Canada’s Essential Resource On Sheet Steel Construction Products. We are Canada’s foremost authority on sheet steel, its products, and its many applications. We are an industry association responsible for the development and dissemination of industry standards. A source for technical information and resources, we provide expert guidance to the general public and sheet steel manufacturers alike. Our overall mission is to pursue the advancement of sheet steel as the most durable and reliable building material on the market today. Cssbi.ca~Site InfoWhoisTrace RouteRBL Check