Information presented here is compiled from plans submitted by the manufacturer to IAPMO ES or engineering on hand at our corporate office.  IAPMO ES is accredited by the American National Standards Institute (ANSI) per the ISO/IEC Guide 65, General Requirements for Bodies Operating Product Certification Systems. This means that building products, materials and designs bearing the IAPMO ES mark of conformity are trusted for their conformity and workmanship by contractors, inspectors, architects, engineers, officials and Authorities Having Jurisdiction.  Evaluation Reports generated by IAPMO ES represent the highest degree of integrity in showing compliance with the International Building Code (IBC) and International Residential Code (IRC).