NEED HELP? Talk To A Door Expert.
(855) 769-9895
logo cdf 1
commercial steel doors

Commercial Knock-Down Door Frames

Starting At $181.90
Fast Nationwide Delivery

Commercial Knock-Down Door Frames are perfect to replace existing frames or place frames into existing walls. Commercial knock-down door frames arrive in 3-pieces, designed to easily assemble for a secure, long-lasting fit.

All Knock-Down Frame Sizes in Stock & Ship in 3-5 Business Days!

Single and Double Frame Packages
Up to 3 Hour Fire Rating Available
Available in All Sizes
Instant Pricing
Build Your Knock-Down Frame Quote
CDF Doors Is Your #1 Online Door Supplier

Standard Product Description

16 Gauge Steel Door Frame
Precision die-cut corners with positive locking tabs to assure rigid assembly connections
For masonry, wood, or metal stud walls

Available Finishes

Grey

Bronze

Black

White

All Industry Standard Sizes

All commercial doors come at a thickness of 1-3/4". We offer the industry's leading standard widths and heights for your openings. We provide cut down and restyling for custom sized doors to meet any custom opening. Be sure to review our width and height sizing chart before building your quote. If you have any further questions please contact us. 

Most Popular Door Sizes

Call Size
Nominal Width
Nominal Height
3068
3’0″ (36 inch)
6’8″ (80 inch)
3070
3’0″ (36 inch)
7’0″ (84 inch)

Door Sizes |6’8″ Height 

Call Size
Nominal Width
Nominal Height
2068
2’0″ (24 inch)
6’8″ (80 inch)
2468
2’4″ (28 inch)
6’8″ (80 inch)
2668
2’6″ (30 inch)
6’8″ (80 inch)
2868
2’8″ (32 inch)
6’8″ (80 inch)
21068
2’10” (34 inch)
6’8″ (80 inch)
3468
3’4″ (40 inch)
6’8″ (80 inch)
3668
3’6″ (42 inch)
6’8″ (80 inch)
3868
3’8″ (44 inch)
6’8″ (80 inch)
4068
4’0″ (48 inch)
6’8″ (80 inch)

Door Sizes |7’0″ Height 

Call Size
Nominal Width
Nominal Height
2070
2’0″ (24 inch)
7’0″ (84 inch)
2470 
2’4″ (28 inch)
7’0″ (84 inch)
2670
2’6″ (30 inch)
7’0″ (84 inch)
2870
2’8″ (32 inch)
7’0″ (84 inch)
21070
2’10” (34 inch)
7’0″ (84 inch)
3470
3’4″ (40 inch)
7’0″ (84 inch)
3670
3’6″ (42 inch)
7’0″ (84 inch)
3870
3’8″ (44 inch)
7’0″ (84 inch)
4070
4’0″ (48 inch)
7’0″ (84 inch)

Door Sizes |8’0″ Height 

Call Size
Nominal Width
Nominal Height
2080
2’0″ (24 inch)
8’0″ (96 inch)
2480 
2’4″ (28 inch)
8’0″ (96 inch)
2680
2’6″ (30 inch)
8’0″ (96 inch)
2880
2’8″ (32 inch)
8’0″ (96 inch)
21080
2’10” (34 inch)
8’0″ (96 inch)
3480
3’4″ (40 inch)
8’0″ (96 inch)
3680
3’6″ (42 inch)
8’0″ (96 inch)
3880
3’8″ (44 inch)
8’0″ (96 inch)
4080
4’0″ (48 inch)
8’0″ (96 inch)
Actual width is 1/4" under nominal door size, to allow for 1/8" clearance on hinge and strike sides.
Actual height is 7/8" under nominal door size. Standard undercut is 3/4" + 1/8" clearance at top = 7/8"
All doors = 1-3/4″ thickness
*Custom Door Widths and Heights upon Request.

Door Fire Rating Options

Our commercial grade doors can withstand the spread of fires to the architectural grade standard fire rating of 90 minutes. We carry fire rated commercial doors with custom options including stain finishes, sizing, and non-existing hardware. The most common application for a fire rated door include commercial openings needing to meet code requirements or any opening that needs to be protected from a potential fire hazard from spreading.
non fire rated
0
20 MIN FIRE RATed
20
45 min fire rated
45
60 min fire rated
60
90 min fire rated
90
userphone-handset