Whirlwind designs and manufactures a complete line of Metal Building Systems and Metal Building Components. With over 500,000 square feet of manufacturing and sales facilities in five locations, and with some of the most modern equipment in the industry, we are able to provide our customers with the capability, service, experience and competitive pricing to get the job done right. Whirlwind's Texas, Georgia, Oklahoma, & California plants are certified by the American Institute of Steel Construction (AISC) to have the personnel, organization, experience, capability and commitment to produce fabricated structural steel for Category MB, Metal Buildings Systems as set forth in the AISC Quality Certification Program