SDI Founding Member

Republic Doors and Frames is a founding member of the Steel Door Institute (SDI) since 1954.

Republic Doors and Frames is a founding member of the Steel Door Institute (SDI). A non-profit association, SDI has set the standard for performance, use, and maintenance of steel doors and frames since 1954.

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 Underwriters Laboratories (UL), 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.

When you see the SDI logo on our products, you can be confident in knowing they have been tested and approved by the most respected laboratories in the country, and are backed up by a commitment to service and support you can count on.

UL Website NFPA Website ANSI Website ASTM Website DHI Website CSI Website BHMA Website

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