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Useful Links

Useful Information

The Door and Hardware Institute is a professional organization that is a good source for education and information on doors, hardware, security and specialty products for the architectural openings industry.

The Steel Door Institute is a voluntary, unincorporated, non-profit business association formed to promote the use of steel doors and frames in the construction industry. Their site includes technical documents, a glossary of terms, an Installation & troubleshooting guide for Steel Doors, ANSI Standards, plus important Fire Door Requirements. It's a great help for architects and specifiers involved in the selection, care and use of steel doors and frames.

Underwriters Laboratories, Inc., (UL) is an independent product safety testing and certification organization. Its website is full of valuable resources and business tools. Includes Guide Information for Fire Doors & Guide Info on Edge Sealing Materials for Fire Doors.