Steel Doors

The #1 resource for steel doors and frames

SDI standards have been specified for over 50 years. As the door and hardware industry evolves, the standards are updated to reflect current best practices. By specifying steel doors and frames to our standards and from SDI Certified manufacturers, you can be assured to receive high-quality standard and custom products.

Steel door & frame installation

Videos and manuals in English and Spanish

People often blame the manufacturer when there are issues, when in fact the problem lies with poor installation. With these step-by-step guides, there is NO EXCUSE for improper installation!

Free installation guides


Models and details available in PDF, AutoCAD, Revit, and SketchUp formats

View and download drawings

What’s new?

Steel Doors

Guideline for Specifying Windstorm Products

April 2019 - The SDI has introduced a new standard just in time for the tornado and hurricane seasons.

SDI 136 Guideline for Specifying Windstorm Products covers the methodology and criteria used for the specification and selection of windstorm resistant door opening assemblies for non-residential construction.