NAAMM (National Association of Architectural Metal Manufacturers)

The trade association for manufacturers of architectural metal products including hollow metal doors and frames, metal stairs, railings, and ornamental metalwork. NAAMM publishes the Hollow Metal Manual.

The HMMA (Hollow Metal Manufacturers Association) division of NAAMM establishes standards for hollow metal door and frame construction, complementing SDI specifications. Publications cover gauge requirements, welding, and finish standards.

NAAMM standards support architects and specifiers in detailing hollow metal work. Member companies manufacture architectural metalwork across North America. Related: SDI, door frame. Shop hollow metal products.

Since 1938, American Doors has supplied commercial doors, frames, and hardware across the U.S., growing from a Houston-based distributor into a multi-market platform serving contractors throughout Texas and Colorado. Family-owned for more than 85 years, we emphasize continuity and craftsmanship, with AHC-certified hardware specialists and experienced estimators delivering fully coordinated Division 8 and Division 10 solutions from specification through installation.

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American Doors is part of Riverbend Industries, a family-owned industrial group focused on building durable, operating businesses.

Riverbend partners with management teams for the long term—investing in people, systems, and manufacturing capability while preserving the culture and accountability that make each business successful.

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NAAMM (National Association of Architectural Metal Manufacturers)

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