The Alpine is our most popular and attractive steel storage building. The Alpine steel storage building is also the most economical and strongest straight sided arch style structure on the market today. This model adapts easily to accept customized ends. Don’t call them metal sheds or barns! They are constructed of AZ180 galvanized steel that carries a 20 year mill warranty. The Alpine steel storage building is 8 feet 2 inches and only one foot inside the foundation. The Alpine provides a wonderful area for a home garage or workshop.