Strong, Sustainable, Stunning
SDI steel doors set the standards - and exceed yours
The Steel Door Institute (SDI) was established in 1954 as a voluntary, unincorporated, non-profit business association whose mission is to promote the use of steel doors and frames in the construction industry.
Representatives of SDI member companies create and publish manufacturing, quality and performance standards and distribute them to licensed architects and construction specifiers at no charge. These documents, collectively referred to as the Fact File, are available on this website as downloadable PDFs or in printed format.
Membership in SDI is open to all American-based companies engaged in the production for sale of swing steel doors and or frames and meeting other criteria. Members agree to establish and abide by SDI manufacturing and quality standards that apply to all doors and frames that they produce.
NEW! Latest Technical Standards Update
SDI-113-13 – Standard Practice for Determining the Steady-State Thermal Transmittance of Steel Door and Frame Assemblies
SDI’s Online Course Now Provides AIA GCBI Hour
March 26, 2013, WESTLAKE, Ohio – The Steel Door Institute-sponsored course Steel: Green Now, Green Forever now offers one American Institute of Architects (AIA) Green Building Certification Institute (GBCI) hour.
READ ALL PRESS RELEASES