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Steel Door Institute

Westlake, OH

About The Steel Door Institute

SDI-logoThe Steel Door Institute (SDI) is an association that promotes the use of steel doors and frames in the construction industry. As a means of accomplishing its mission, the produces technical documents, videos and other educational materials. SDI tests steel doors and frames for strength, quality, consistency, security, weather and fire resistance, wear and tear, and longevity. For more information, visit

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