The National Association of Architectural Metal Manufacturers (NAAMM) has published a new standard, ANSI/NAAMM HMMA 860-2013, Guide Specifications for Hollow Metal Doors and Frames. Additionally, it has revised ANSI/NAAMM HMMA 841-2013, Tolerances and Clearances for Commercial Hollow Metal Doors and Frames (revision of ANSI/NAAMM HMMA 841-2007).

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