Hollow Metal Door Frames
Factory-welded hollow metal frames engineered for masonry, drywall, and existing opening applications — single and double rabbet in standard and custom profiles.
HMF Express welded hollow metal frames are manufactured to ANSI/NAAMM HMMA standards in 16 and 14 gauge steel. Available in single and double rabbet configurations, a full range of depths for different wall thicknesses, and both standard and custom profiles.
Standard Single Rabbet
Single rabbet profile for single-door openings. Available in all standard depths for drywall and masonry walls.
Double Rabbet
The most common frame profile — dual rabbet for pairs of doors sharing a common center jamb, no mullion required.
Drywall Frame
Welded frames with integral drywall stops for use in metal stud and drywall wall systems.
Existing Opening Frame
Retrofit and replacement frames sized for installation into fully built-out openings.
Knock-Out Frame
Welded frames with punched-out anchor slots for field-adjustment in masonry applications.
| Gauge | 14 GA, 16 GA |
|---|---|
| Rabbet | Single, Double |
| Standard Depths | 4-7/8", 5-7/8", 6-7/8", 7-7/8", 8-7/8" |
| Fire Rating | 20, 45, 60, 90 minute available |
| Anchor Options | Floor, strap, wire, jamb anchors |
| Finish | Grey Primer (field-paintable) |