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.
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.
Use our handy door selector tool to help you select the perfect doors for your next project.
Need design inspiration? Check out the product gallery showcasing multiple styles, shapes and colors of steel doors.