KD Drywall Frame

Knocked Down Drywall Metal Frame

Hollow Metal Door Frame - KD Drywall

Starting at $109

Nationwide Delivery!

A KD or Knocked Down hollow metal drywall frame (slip-on frame) is used for interior applications and comes in 3 pieces (strike jamb, hinge jamb and head). The KD drywall door frame is designed to be installed after the stud wall has been built and drywall applied, as it wraps the wall.

  • Easy to install - simply wrap built stud wall
  • Fire-Rated up to 90 Minutes (1-1/2 Hour Label)
  • For use with Steel or Wood Doors
  • Standard Jamb Depths of 4-3/4" to 8-1/4"
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  • 16 Gauge Cold Rolled Steel
  • Prime Painted Gray; Factory Applied, Baked On
  • Screw Adjusting Compression Anchors on Jambs
  • Sill Straps on Jambs or Dimpled Base Anchor
  • Unequal Rabbet, 2-inch Jamb and Head Faces
  • 5/8” Stop Height
  • 1/2” Double Return
  • Exact Fit Mitered Corners
  • 7 Gauge Hinge Reinforcements
  • 4-7/8” Universal ASA Strike Preparation
  • 9/32” Silencer Preparation
  • Warnock Hersey Fire Label (20 to 90 Minute)
KD Drywall Hollow Metal Frame
Typical Frame Preps
Common Jamb Depths
5-5/8 Jamb Depth
5-5/8" Jamb Depth
(4-5/8" Wall Thickness)
5-7/8 Jamb Depth
5-7/8" Jamb Depth
(4-7/8" Wall Thickness)
7-1/8 Jamb Depth
7-1/8" Jamb Depth
(6-1/8" Wall Thickness)
8-1/4 Jamb Depth
8-1/4" Jamb Depth
(7-1/4" Wall Thickness)
All Jamb Depths
Measure the overall wall thickness and add 1" to determine jamb depth

Wall Thickness (throat size) + 1/2" Return + 1/2" Return = Jamb Depth
Measure Wall Thickness for Door Jambs
Hollow Metal Drywall Frame
Stud Type
Stud Size
Drywall on each sideWall Thickness (Throat Size)Jamb Depth (Profile)
Wood
2" x 4″(3-1/2")
5/8"3-1/2" + 1-1/4" = 4-3/4"5-7/8"
Wood
2" x 4″(3-1/2")
1/2"3-1/2" + 1" = 4-1/2"5-1/2"*
Wood
2" x 6″(5-1/2")
5/8"5-1/2″+ 1-1/4" = 6-3/4"7-3/4"
Wood
2" x 6″(5-1/2")
1/2"5-1/2" + 1" = 6-1/2"7-1/2"*
Steel
2" x 3″(2-1/2")
5/8"2-1/2" + 1-1/4" = 3-3/4"4-3/4"
Steel
2" x 3″(2-1/2")
1/2"2-1/2" + 1" = 3-1/2"4-1/2"*
Steel
2" x 4″(3-5/8")
5/8"3-5/8" + 1-1/4" = 4-7/8"5-7/8"
Steel
2" x 4″(3-5/8")
1/2"3-5/8" + 1" = 4-5/8"5-5/8"
Steel
2" x 4″(3-5/8")
5/8" (2 Layers)3-5/8" + 2-1/2" = 6-1/8"7-1/8"
Steel
6"
5/8"6" + 1-1/4" = 7-1/4"8-1/4"
Steel
6""
5/8" (2 Layers)6" + 2-1/2" = 8-1/2"9-1/2"*
Steel
8"
5/8"8" + 1-1/4" = 9-1/4"10-1/4"*
*Non-Stock Jamb Depth, Custom - 2-3 Week Lead Time
Rough Opening Sizes



KD Drywall Frame (wraps the wall)
A = opening width + 2″
B = opening height + 1″

The rough opening would be 38″ x 85″
for a 3’0″ x 7’0″ door & frame

Note: For fire rated openings, drywall must extend at least 1/2″ into frame.

Anchor Details

*If not included: Can be field prepped by drilling and countersinking holes; use drywall screw to anchor.