SDI standards have been specified for over 50 years. As the door and hardware industry evolves, the 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 standard and custom products.

What does "Standards as Tough as Steel" mean to architects, specifiers, building owners, and construction professionals who use SDI steel doors and frames?

It means that 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.

SDI tests steel doors and frames for strength, quality, consistency, security, weather and fire resistance, wear and tear, and longevity. Testing is undertaken in conjunction with the top testing labs in the country like UL, Intertek, National Fire Protection Association (NFPA), American National Standards Institute (ANSI), and American Society for Testing and Materials (ASTM). In addition, SDI works alongside industry associations representing related products such as Door & Hardware Institute (DHI), Construction Specifications Institute (CSI) and the Builders Hardware Manufacturers Association (BHMA) to ensure compatibility with products used in conjunction with steel doors and frames.

Choose from the following links to view the Steel Door Institutes standards:

• SDI Technical Documents
• ANSI/SDI Standards
• Download the Fact File to have all 33 of the technical documents in one PDF file.

SDI Products are Backed by Superior Service and Support

Steel doors and frames manufactured by SDI member companies are available through a network of top distributors located throughout the United States. Local distributors in all major market areas ensure prompt delivery and quality service to the end user.