SDI Members ↦ Product Gallery ↦ Specialty Doors ↦ Specifications ↦ Distributor Resources ↦ SDI Certified ↦ About SDI ↦ Technical Assistance ↦ Educational Webinars These webinars are presented by Intertek. As a testing agency, their educational materials offer detailed insight into the testing and certification of doors and frames. Fire Doors 101: Your Guide to Testing and Certification Covers the testing and certification of fire doors, from the initiation process through labeling and installation. The Acoustic Series: A Focus on Fenestration Explains the test methods, ratings, and codes for acoustical fenestration components such as doors and windows. Tornado Testing & Certification Requirements Describes the tornado testing and certification requirements to help ensure building and construction products meet the desired level of performance.