AMERICAN INSTITUTE OF STEEL CONSTRUCTION CBC Steel Buildings, Lathrop, CA is certified by the American Institute of Steel Construction to have Personnel, Organization, Experience, Capability, and Commitment meeting the requirements of the Category MB, Metal Building Systems category(s) as set forth in the AISC Certification Program.      International Accreditation Service, (IAS).      CBC Steel Buildings has been a member of the "IAS", formerly      the "ICBO Evaluation Service", since March 1992. MBMA CBC Steel Buildings has been a member of the Metal Building Manufacturers Association Since June 1998.