The Trusted Authority on
Steel Doors & Frames
Resources
PERFORMANCE & TECHNICAL STANDARDS
Developing and updating standards and test procedures for the door and hardware industry
Drawings & Models
Creating a complete collection of downloadable resources including door models & frame details
INSTALLATION EXPERTISE
Providing free videos, manuals, and articles on steel door & frame installation
Door Selector
Providing an easy to use door selector tool to help you choose the perfect door openings for your next project
QUALITY CERTIFICATION
Ensuring manufacturers meet our rigorous door and frame manufacturing requirements & performance standards
EDUCATION & RESOURCES
Producing door & frame industry specifications and continuing education courses that are recognized by AIA & GBCI
SDI Certified Manufacturers
The only way to guarantee you’re getting doors and frames built to SDI standards is by choosing an SDI member manufacturer. Every member is audited for quality, performance, and manufacturing standards—and every product is 100% made in America.
Specialty Steel Door Types
Steel doors and frames are no longer just standard, they’re manufactured for both performance and aesthetics. From fire-rated to bullet, blast, and acoustic options, there’s a opening solution for every need.
Fire-Rated Steel Doors
Specially constructed doors that are designed to withstand high heat and prevent the spread of flames and smoke for up to 3 hours
Acoustic Steel Doors
Engineered with sound-dampening materials to reduce noise transmission – commonly used in environments requiring privacy & quiet
Custom Steel Doors
Tailored to meet unique specifications for size, style, function, or performance in various specialized applications
Steel Door & Frame Installation Made Easy
Explore videos, manuals, and tips that show how to install and troubleshoot steel doors and frames the right way.
Step-by-Step Prep & Installation Guides
Learn how to install steel doors and frames in masonry, stud, or drywall openings with clear videos and manuals
Troubleshooting Common Issues
Fix common problems like binding, gaps, and out-of-square frames with easy-to-follow solutions
Pro Tips for Grouting, Welding & Storage
Avoid costly mistakes with expert advice on jobsite storage, frame welding, and when (not) to grout
Fire-Rated Door Specs & Field Prep
Understand fire code basics, inspection checklists, and best practices for prepping fire-rated assemblies