Steel Door Inc.

Steel Door Institute

The #1 resource for commercial steel doors and frames

The Steel Door Institute (SDI) was established in 1954 as a voluntary, non-profit business association that develops quality and performance standards for steel doors and frames.

SDI’s standards are available without charge. Design professionals around the world specify these standards because they are concise and regularly updated with leading industry practices.

Only SDI Certified manufacturers undergo recurring audits to ensure compliance with our standards for strength, quality and consistency. By specifying SDI Certified, you can be assured you will receive a product that is well-constructed, tested, and evaluated to meet your specifications.

In addition to our trusted industry standards, the SDI website has a Door Selector Tool, Drawings and Product Gallery. We also offer online and in-person continuing education for AIA and GBCI credit.

First Industry-Wide Environmental Product Declarations Contribute to LEED v4


We have just completed the first industry-wide, LEED-compliant Environmental Product Declarations (EPDs) for steel doors. This was achieved by undergoing a “cradle-to-gate” assessment for two products: heavy duty flush panel steel doors made with a polystyrene core and 5-3/4” 16-gauge steel prime painted door frames.

Now, these steel doors and frames can contribute toward credit in the LEED v4 Materials and Resources category, “Building Product Disclosures and Optimization”.

For more information, see our recent article in Door & Hardware Magazine.