4PostOFR

4-Post Open Frame Racks

4-Post Open Frame Racks combine the mounting security of a cabinet with the accessibility of a rack. Used in communication data center and telecommunication room applications, these adjustable depth racks support deeper, heavier network equipment. They can be ganged with 2-Post Open Frame Racks or other 4-Post Open Frame Racks to expand existing systems.

4-Post Open Frame Racks are available with square hole or 12-24 tapped rails, in both 19” and 23” EIA panel widths. A variety of shelves and vertical cable managers are available to complete the setup. 4-Post Open Frame Racks ship flat. Assembly required.


Need a 4-Post Open Frame Rack Fast?

We stock the 7′ size. Call us and we can get your order processed immediately – 507-287-3535.

Need Something More Robust?

Check out our Security/AV Racks with sturdy construction capable of holding up to 1,000 lbs.

Features

Features

  • Available in six heights and two widths
  • Adjustable Depth Min/Max = 20.50″ / 32.50″ [521 mm / 826 mm]
  • Numbered rack spaces – front and rear
  • Channels constructed from heavy duty aluminum extrusion
  • Heavy duty base includes holes for securing to floor
  • Ships flat to save space
  • 50 pack of extra hardware included
  • UL listed

Paint / Finish

  • Color: Black
  • Our products are finished in textured powder paint. Powder coating provides a durable high-quality finish.

Load Rating

  • 800 lbs. [363 kg.]

Industry Standards

  • EIA 310-D
  • RoHS compliant
  • UL listed

How to Order

  • Choose from a variety of  sizes – some of which are in stock.

Sizes Available

Adjustable Depth 4-Post Open Frame Racks – UL Listed

Includes: Rack with Square Hole Rails, Extra Black Rack Screws and Cage Nuts (50 pk), Assembly Instructions. Ships flat. Assembly required.

19″ EIA Part Number 24″ EIA Part Number Rack Units
RRD1903A-CN-BK* RRD2303A-CN-BK* 18U [3 ft.]
RRD1904A-CN-BK* RRD2304A-CN-BK* 24U [4 ft.]
RRD1906A-CN-BK* RRD2306A-CN-BK* 38U [6 ft.]
RRD1907A-CN-BK RRD2307A-CN-BK 45U [7 ft.]
RRD1908A-CN-BK* RRD2308A-CN-BK* 52U [8 ft.]
RRD1909A-CN-BK* RRD2309A-CN-BK* 58U [9 ft.]

*Minimum order quantity required.
Ask about tapped rail versions of the part number above.

Product Type

Preconfigured

Used Where

Requires Rear Attach Point

Style

Material

Finish

Details

Sold As

Fits Rail to Rail Setting

U

Side Flange Style

Usable Space Front

Usable Space Rear

Usable Space Top

Usable Space Bottom

Usable Space Slope

Door Structure

Fits Frame Depth

Fits Frame Height

Max Usable Space Width

Max Usable Space Depth

Adds to Overall Height

Adds to Overall Width

Adds to Overall Depth

Fasteners Required

Overall Height

Overall Width

Overall Depth

Weight Load Capacity

Wedge Degree

CFM

dBA

Volts

kW

Amps

Phase

Recepticals

Plug Type

Cord Length

Airflow Direction

Locking

Hinge Side

Number of Monitors

Range of Motion

Mounting Hardware Included

Requires Paint

Requires Laminate

Laminate

Paint Color

Shipping Weight

UL Listed

RoHS Compliant

REACH Compliant

EIA Standard

MIL Standard

Meets Attenuation Levels

Seismic Compliance

4-Post Open Frame Racks Compatible Parts

Select Part Number Description Files Product Type Preconfigured Used Where Requires Rear Attach Point Style Material Finish Fits Rail to Rail Setting EIA Width U Front Flange Style Side Flange Style Usable Space Front Usable Space Rear Usable Space Top Usable Space Bottom Usable Space Slope Door Structure Fits Frame Depth Fits Frame Height Fits Frame Types Max Usable Space Width Max Usable Space Depth Adds to Overall Height Adds to Overall Width Add to Overall Depth Fasteners Required Overall Height Overall Width Overall Depth Weight Load Capacity Wedge Degree CFM dBA Volts kW Amps Phase Recepticals Plug Type Cord Length Airflow Direction Locking Hinge Side Number of Monitors Range of Motion Mounting Hardware Included Requires Paint Requires Laminate Laminate Paint Color Shipping Weight UL Listed RoHS Compliant REACH Compliant EIA Standard MIL Standard Meets Attenuation Levels Seismic Compliance Website Description Ships Contents Catalog Brochure Technical Drawing
CMA-001-C
459281
Velcro Cable Ties (20 pk) Cable Manager Accessory Style C [Universal] STP Cable Management Internal No Velcro Any Yes No (Not Painted) No No Yes Yes EIA-310-D No
HCMC1901-BK
464062
1U Single Sided Horizontal Cable Manager - 19” EIA UL Listed | Includes: Metal Rings and Snap-On Hinging Cover N/A Cable Management Front, Rear Yes 19 1 Any No No (Black Only) No No No No No
HCMC1901D-BK
464063
1U Double Sided Horizontal Cable Manager - 19” EIA UL Listed | Includes: Metal Rings and Snap-On Hinging Cover N/A Cable Management Front, Rear Yes 19 1 Any No No (Black Only) No No No No No
HCMC1902-BK
464064
2U Single Sided Horizontal Cable Manager - 19” EIA UL Listed | Includes: Metal Rings and Snap-On Hinging Cover N/A Cable Management Front, Rear Yes 19 2 Any No No (Black Only) No No No No No
HCMC1902D-BK
464065
2U Double Sided Horizontal Cable Manager - 19” EIA UL Listed | Includes: Metal Rings and Snap-On Hinging Cover N/A Cable Management Front, Rear Yes 19 2 Any No No (Black Only) No No No No No
HW-RSL100-PURPLE
461333
Rackstud - Mounting Hardware Purple Color for 12 Gauge Square Rails (100 pk) N/A Hardware No No (Not Painted) No No No No No
HW-RSL100-RED
461332
Rackstud - Mounting Hardware Red Color for 14 Gauge Square Rails (100 pk) N/A Hardware No No (Not Painted) No No No No No
RRD1903A-BK
463213
4-Post Adjustable Depth Open Frame Rack (3') - 18U, 19" EIA HxWxD = [36.00" x 20.25" x 44.50"] [914mm x 514mm x 1130mm] Usable Depth Min/Max = [20.50" https://3f7eu42yze9si2wns48bh037-wpengine.netdna-ssl.com/ 32.50"] [521mm / 826mm] Weight Capacity = [800 lbs.] [363 kg.] UL Listed | Ships Flat, Assembly Required Includes: Rack with 12-24 Tapped Rails, Extra Black Rack Screws (50 pk), Assembly Instructions N/A Frame No Aluminum Extrusion Textured Powder Paint 19 18 12-24 Tapped No Flange 36.000" 20.250" 44.500" (Max) 800 lbs. Static Load No (Black Only) No Yes Yes No EIA-310-D No
RRD1903A-CN-BK
464072
4-Post Adjustable Depth Open Frame Rack (3') - 18U, 19" EIA HxWxD = [36.00" x 20.25" x 44.50"] [914mm x 514mm x 1130mm] Usable Depth Min/Max = [20.50" https://3f7eu42yze9si2wns48bh037-wpengine.netdna-ssl.com/ 32.50"] [521mm / 826mm] Weight Capacity = [800 lbs.] [363 kg.] UL Listed | Ships Flat, Assembly Required Includes: Rack with Square Hole Rails, Extra Black Rack Screws and Cage Nuts (50 pk), Assembly Instructions N/A Frame No Aluminum Extrusion Textured Powder Paint 19 18 Square Hole No Flange 36.000" 20.250" 44.500" (Max) 800 lbs. Static Load No (Black Only) No Yes Yes No EIA-310-D No
RRD1904A-BK
463214
4-Post Adjustable Depth Open Frame Rack (4') - 24U, 19" EIA HxWxD = [36.00" x 20.25" x 44.50"] [914mm x 514mm x 1130mm] Usable Depth Min/Max = [20.50" https://3f7eu42yze9si2wns48bh037-wpengine.netdna-ssl.com/ 32.50"] [521mm / 826mm] Weight Capacity = [800 lbs.] [363 kg.] UL Listed | Ships Flat, Assembly Required Includes: Rack with 12-24 Tapped Rails, Extra Black Rack Screws (50 pk), Assembly Instructions N/A Frame No Aluminum Extrusion Textured Powder Paint 19 24 12-24 Tapped No Flange 48.000" 20.250" 44.500" (Max) 800 lbs. Static Load No (Black Only) No Yes Yes No EIA-310-D No