The rough opening would be 38 x 85.
Hollow metal door frame rough opening sizes.
Interior knockdown frames that wrap wall.
For a 3070 single door the frame s rough opening would be 37 1 2 x 84 1 2 four sided borrowed light is frame opening order size rabbet to rabbet plus 2 3 4 1 4 both width and height.
For a 3 0 x 7 0 door frame.
Rough opening guide for knockdown drywall frames overall frame size 2 on width 1 height varying face dimensions will not change rough opening sizes in most applications.
Since the standard face on a hollow metal frame is 2 the outside dimensions of a 3068 welded frame will be 3 4 x 6 10 so this ro dimension will give you 1 4 of play.
Learn about hollow metal frame anchors in our previous blog post.
Block or exterior wood stud nominal door size recommended opening 2 0 x 6 8 28 1 2 x 82 1 4 2 4 x 6 8 32 1 2 x 82 1 4 2 6 x 6 8 34 1 2 x 82 1 4 2 8 x 6 8 36 1 2 x 82 1 4 2 10 x 6 8 38 1 2 x 82 1 4 3 0 x 6 8 40 1 2 x 82 1 4 3 4.
Slip on kd drywall frames 2.
Interior knockdown frames hollow metal frames that butt wall.
For fire rated openings drywall must extend at least 1 2 into frame.
A opening width 2.
Hollow metal frame applications for existing openings.
B opening height 1.
Hollow metal frames that wrap wall.
Flush mount frames with punch dimple anchors.
Recommended opening sizes for hollow metal frames.
Standard hollow metal door frames are constructed from 16 gauge roll form steel but can also be manufactured in 14 gauge or 12 gauge metal thicknesses.
Recommended rough opening sizes for commercial metal door frames.
Using a 3068 door as an example the rough opening size for a welded frame would be 3 4 1 4 x 6 10 1 4.
This also applies to cased open frames.