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Steel Door Institute

30200 Detroit Road
Westlake, OH 44145
United States

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. Representatives of SDI member companies create and publish these standards, which are made available without charge to architects and other design professionals to ensure quality and consistency of hollow metal doors and frames used in construction. As a complete hollow metal door and frame resource, the SDI website provides all standards, Frequently Asked Questions, and a Gallery of Products. SDI also offers online education for AIA and GBCI credit. SDI members are the only manufacturers certified to meet SDI’s standards for strength, quality and consistency. Manufacturers who hold SDI certification are regularly audited to SDI’s manufacturing, performance, and quality standards. By specifying SDI Certified, design professionals can be confident their products will be true to spec and built to last.

Thermal Break Frames

Thermal Break Frames

Tornado Doors & Frames | Specialty Products | Steel Door Institute

Tornado Doors & Frames

Specialty Products | Wood Grain Finished Doors | Steel Door Institute

Wood Grain Finished Doors

Security Doors & Frames | Specialty Products | Steel Door Institute

Security Doors & Frames

Acoustic Door Specification | Sound Proof Doors

Acoustic Door

Specialty Products | Finish Painted Doors and Frames | SDI

Prefinished Doors and Frames

Stainless Steel Doors & Frames | Steel Door Institute

Stainless Steel Doors & Frames

Specialty Products | Hurricane Resistant Doors | Steel Door Institute

Hurricane Resistant Doors

Blast Doors | Pressure Resistant Doors | SDI

Blast Doors | Pressure Resistant Doors

90 Minute Fire Rated Doors | Steel Fire Doors

90 Minute Fire Rated Doors