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.

As a complete steel door and frame resource, the SDI website also has a Door Selector Tool, Frequently Asked Questions and Product Gallery. We also offer online and in-person continuing education for AIA and GBCI credit.

SDI Welcomes New Member

We’re pleased to announce that Premier is the latest manufacturer to become an SDI member. They underwent an extensive auditing process that included an on-site visit to demonstrate their compliance with our standards.

Premier joins 11 other SDI members, whose products are sold by door and frame distributors in all 50 states.

Visit Premier website