The #1 Resource for
Steel Doors & Frames
The Steel Door Institute produces quality and performance standards for steel doors and frames. And as the door and hardware industry evolves, our standards are updated to reflect current best practices. By specifying steel doors and frames to our standards and from SDI Certified manufacturers, you can be assured to receive high-quality products that fit your specific needs.
Setting The Standard for over 65 years
Anyone specifying or purchasing a steel door or frame from an SDI member company can be confident that the product has been tested and approved by the most respected laboratories in the country, and that it’s backed up by a commitment to service and support you can count on.
How to Install Steel Doors and Frames
People often blame the manufacturer when there are issues with their standard or custom steel doors and frames, when in fact the problem lies with poor installation. With these step-by-step guides, there is NO EXCUSE for improper installation!
New Fire Video
The SDI has produced a two-minute overview video on fire rated doors and frames. See where they are required, how they are tested, and learn about labels.
Help yourself to models and details in PDF, AutoCAD, Revit, and SketchUp formats.
Join over 7,000 architects who receive quarterly tips on steel doors and frames.
This tool helps you choose the appropriate doors for your projects. Start by clicking the building type and opening to see the most common door specifications based on your criteria.