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  • Steel Door Institute, Steel Door, Fire Rated Doors, Hollow Metal Door
  • Steel Door Institute, Hollow Metal Frame, Door Specifications, Steel Door Manufacturers
  • Steel Door Institute, BR Doors, Door Standards, Hurricane Doors
  • Steel Door Institute, Steel Door Specification, Fire Rated Door Frame, Steel Fire Door
  • Steel Door Institute, Tornado Doors, Acoustic Doors, Blast Doors

Strong, Sustainable, Stunning

SDI sets the standards - and exceeds yours

The Steel Door Institute (SDI) was established in 1954 as a voluntary, non-profit business association that develops quality and performance standards for steel doors and frames.

Representatives of SDI member companies create and publish these standards, which are made available without charge to architects and other design professionals to ensure quality and consistency of hollow metal doors and frames used in construction.

As a complete hollow metal door and frame resource, the SDI website provides all standards, an extensive set of Frequently Asked Questions, and a Gallery of Products. SDI also offers online education for AIA and GBCI credit.

SDI members are steel door and frame manufacturers who have passed an on-site audit from hollow metal door and frame engineers. When you specify an SDI door you can be assured you will receive a product that is well-constructed, tested, and evaluated to meet your specifications.


SDI Launches Mobile Website for Easier
Access to Information

April 10, 2014 WESTLAKE, Ohio has gone mobile, making it easier for architects and construction professionals in the field to access SDI standards and other time-critical information about steel doors and frames.



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