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.

Choose Quality

Specify SDI Certified

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. All SDI Certified members proudly manufacture their doors and frames in the USA.


Help yourself to models and details in PDF, AutoCAD, Revit, and SketchUp formats.

All SDI Certified doors & frames are proudly


Not just assembled … manufactured.

Door Selector

Use our handy door selector tool to help you select the perfect doors for your next project.

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Product Gallery

Need design inspiration? Check out the product gallery showcasing multiple styles, shapes and colors of steel doors.