Choose Quality.
Specify SDI Certified.

SDI Certified is a popular industry certification from the Steel Door Institute. To earn this certification, manufacturers are regularly audited to ensure they meet our rigorous manufacturing, performance, and quality standards. Certified manufacturers are also required to maintain compliance with ANSI standards on a continuous basis.

Many Claim to Meet Our Standards

Only a select list of the most respected steel door and frame manufacturers have proven it and are proud to be called SDI Certified. These manufacturers only produce high-quality standard, custom, and specialty products in strict adherence to ANSI standards.

A Cut Above the Rest

When it comes to steel doors and frames, quality is everything. The SDI Certification assures architects and design professionals that the manufacturer of their doors and frames meet the highest standards available in the industry.

SDI Certification Requirements

Manufacturers must meet or exceed these ANSI requirements to be classified as SDI Certified.


Doors & Frames Manufactured in the USA

ANSI/SDI A250.10

Test Procedure & Acceptance Criteria — Prime Painted Steel Surfaces for Steel Doors & Frames


Test Procedure & Acceptance Criteria — Physical Endurance for Steel Doors, Frames & Frame Anchors

ASTM A1008*

Standard Specification — Cold Rolled Steel Sheets


Standard Specification — Galvanized / Galvannealed

UL 10C

Standard Specification — Positive Pressure Fire Test


Recommended Practice — Hardware Reinforcing on Standard Steel Doors & Frames

ANSI/SDI A250.3*

Test Procedure & Acceptance Criteria — Factory Applied Finish Coatings for Steel Doors & Frames

SDI 113

Standard Practice — Steady-State Thermal Transmittance of Steel Door & Frame Assemblies

SDI 117

Manufacturing Tolerances — Standard Steel Doors & Frames

* if offered by manufacturer

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