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Steel Door Institute

About the Steel Door Institute

The Steel Door Institute (SDI) is a voluntary, unincorporated business association. It aims to promote the safe and productive use of steel doors and frames in the construction industry.


Representatives of SDI member companies are responsible for creating and publishing manufacturing, quality and performance Standards. SDI tests steel doors and frames for strength, quality, consistency, security, weather and fire resistance, wear and tear and longevity. This means consumers can trust the quality, safety and resilience of steel doors and frames bearing the SDI logo.

 

Intertek Inform: Your Gateway to SDI Standards 

Intertek Inform makes it easy for businesses to buy SDI Standards from our website, giving convenient access to globally recognised guidelines set by the Steel Door Institute. Use our Standards Store to access building codes and Standards relating to the use of steel doors and frames in developments and construction projects.


On our website, you can purchase individual SDI Standards in digital PDF or printed (hardcopy) formats. Or you may wish to manage your Standards with i2i, our secure, configurable, cloud-based platform, made available through our subscription service.

 

Standard Steel Doors and Frames for Modular Masonry Construction
Published: 04-Nov-2023
Hinge and Strike Spacing
Published: 04-Nov-2023
Hardware Preparation in Steel Doors and Steel Frames
Published: 28-Jul-2023
Standard Practice for Determining the Steady-State Thermal Transmittance of Steel Door and Frame Assemblies
Published: 01-Jun-2023
Zinc-Coated (Galvanized/Galvannealed) Steel Doors and Frames
Published: 20-Apr-2023
Specifications for Standard Steel Doors and Frames (SDI-100)
Published: 06-Apr-2023
Manufacturing Tolerances for Standard Steel Doors and Frames
Published: 01-Mar-2023
Recommended Erection Instructions for Steel Frames
Published: 17-Mar-2022
Guideline for Specifying Windstorm Products
Published: 03-May-2019
Guidelines for Acoustical Performance of Standard Steel Doors and Frames
Published: 01-Mar-2019
Test Procedure and Acceptance Criteria for Factory Applied Finish Coatings for Steel Doors and Frames
Published: 01-Jan-2019
Guidelines to Measure for Replacement Doors in Existing Frame Openings
Published: 01-Jan-2018
Recommended Practice for Hardware Reinforcing on Standard Steel Doors and Frames
Published: 30-Dec-2015
GLOSSARY OF TERMS FOR HOLLOW METAL DOORS AND FRAMES
Published: 07-Apr-2015
INSTALLATION TROUBLESHOOTING GUIDE FOR STANDARD STEEL DOORS AND FRAMES
Published: 12-Jan-2013
ACCELERATED PHYSICAL ENDURANCE TEST PROCEDURE FOR STEEL DOORS
Published: 12-Jan-2015
BASIC FIRE DOOR, FIRE DOOR FRAME, TRANSOM/SIDELIGHT FRAME, AND WINDOW FRAME REQUIREMENTS
Published: 12-Jan-2013
ELECTRONIC HINGE PREPARATIONS
Published: 12-Jan-2013
MAINTENANCE OF STANDARD STEEL DOORS AND FRAMES
Published: 12-Jan-2013
SERIES - INDUSTRY ALERTS (A THROUGH L)
Published: 12-Jan-2013
SERIES - INDUSTRY ALERTS (A THROUGH L)
Published: 12-Jan-2013
Recommended Selection and Usage Guide for Standard Steel Doors
Published: 01-May-2023
Test Procedure and Acceptance Criteria for Physical Endurance for Steel Doors, Frames and Frame Anchors
Published: 17-Oct-2022
Guideline for Specifying Steel Doors and Frames for Blast Resistance
Published: 05-Sep-2022

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Frequently Asked Questions

Below are some of the most common questions about the Steel Door Institute.

The SDI is a not-for-profit business association. Its goal is to serve architects, specifiers, building owners and construction professionals who use SDI steel doors and frames in their work. The SDI offers these groups technical guidance and support, to ensure compatibility with other building products used in conjunction with steel doors and frames.

The organisation carries out extensive testing on steel doors and frames, to ensure they achieve peak safety and quality Standards. Testing is done using top US testing labs including UL, Intertek, National Fire Protection Association (NFPA), American National Standards Institute (ANSI) and American Society for Testing and Materials (ASTM).

SDI also works alongside industry associations for related products. This includes the Door & Hardware Institute (DHI), Construction Specifications Institute (CSI) and the Builders Hardware Manufacturers Association (BHMA). Steel doors and frames manufactured by SDI member companies are accessible via a network of US distributors.

Relevant codes relate to fire doors, windstorms, accessibility, energy conservation, sustainability, building Standards and design Standards.

SDI is a voluntary, unincorporated, not-for-profit, member-based organisation, under the leadership of a managing director. It is located in Westlake, Ohio, US.