NAAMM Publishes Tech Notes for Hollow Metal Manufacturers

The National Association of Architectural Metal Manufacturers (NAAMM) has announced that its Hollow Metal Manufacturers Association (HMMA) division has published three Tech Notes that are designed to clarify misconceptions related to manufacturing and installing hollow metal doors and frames. The Tech Notes are titled "Defining Undercuts" (HMMA-810 TN01-03), "Grouting Hollow Metal Frames" (HMMA 820 TN01-03) and "Continuously Welded Frames" (HMMA-820 TN02-03).

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