44 RU MRK Series 22 Inch Wide Rack, 42 Inches Deep, Cage Nut
44 RU floor-standing rack, 22 inch wide, 42 inch deep, with cage nut rails and seismic rating
The MRK-4442PRO is a heavy-duty, 44 RU floor-standing rack designed for high-performance AV environments. This frame-only configuration features a 22 inch (55.9 cm) wide footprint and a 42 inch (106.7 cm) depth, providing a usable depth of 39.6 in (100.6 cm) and a usable height of 77.13 in (195.9 cm). Built with fully welded construction for maximum strength, it is an ideal workhorse for large-scale, multi-bay installations where units can be gangable to form continuous enclosures. This model is TAA compliant and UL listed, meeting rigorous standards for reliability. For seismic-sensitive environments, the MRK series is rated with a seismic load capacity of 1050 lbs (476.3 kg) and an ASCE 7-10 rating. To complete the enclosure, installers can add SPN-44-423 side panels or a standard configurable rear door. The unit includes two pairs of cage nut style rackrails and features multiple lacing points and slotted rail brackets to facilitate flexible cable management.
Specifications are supplied by the manufacturer. For complete details, check the Resources section.Key features
Specifications
Main specifications 8
| Depth | 42 in (106.7 cm) |
| Height | 83.13 in (211.2 cm) |
| Panel Width | 19 in (48.3 cm) |
| Rack Units | 44 RU |
| Shipping Weight | 190 lbs (86.2 kg) |
| UL Load Capacity | 2500 lbs (1,134 kg) |
| Usable Depth | 39.6 in (100.6 cm) |
| Usable Height | 77.13 in (195.9 cm) |
All other specifications 12
| Width | 22 in (55.9 cm) |
| Federal Ops Country of Origin | USA |
| Gangable | Yes |
| Product Configuration | Frame Only |
| Rack Rail Type | Cage Nut |
| Rear Door | Yes |
| Side Panel | No |
| TAA Compliant | YesYes |
| UPC | 656747068881 |
| ASCE Number | 7-10 |
| Certifications | ASCETAAUL Listed |
| Seismic Load Capacity | 1050 lbs (476.3 kg) |
Resources
You'll need these with it
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44 RU Side Panels for 42-43 Inch Deep MRK or DRK Racks
SPN-44-423$1,434.60
Select Series PDT Low Profile Vertical Power Strip with Dual Circuit, 10 Outlet, 20A Hardwired
PDT-2X520$418.50
Power Strip, 24 Outlet, 30A, 2 Circuits Twistlock Plug
PD-2X1215TL-30CB$1,429.20
USC Universal Sequencing Controller 1 Space Sequencing Controller
USC-6R$1,044.90
Select Series UPS Backup Power Systems - UPS-SRBP-500
UPS-SRBP-500$351.00
MPR Power Module 30A, L5-30R Twistlock
RLM30-L530-1$763.20
MPR Module 15A, Controlled Stand-Alone
RLM-15-1CA$288.00
MPR Power Module 20A, L5-20R Twistlock
RLM30-L520-1$716.40
MPR Module 20A, Controlled Stand-Alone
RLM-20-1CA$306.00
Questions about this part
Yes, the MRK-4442PRO features a standard 19 in (48.3 cm) panel width designed to accommodate all standard 19-inch rackmount gear.
Yes, the MRK-4442PRO features a standard 19 in (48.3 cm) panel width designed to accommodate all standard 19-inch rackmount gear.
What accessories are needed to complete this enclosure?
This SKU is a Frame Only configuration; to fully enclose the unit, you can add side panels such as the SPN-44-423 or specialized rear doors.
Is this rack suitable for seismic-prone areas?
Yes, this rack is rated for a seismic load capacity of 1050 lbs (476.3 kg) and meets ASCE 7-10 requirements.
What is the total weight capacity for this rack?
The MRK-4442PRO has a UL load capacity of 2500 lbs (1,134 kg), making it suitable for heavy, high-density equipment loads.
Which documents are available for submittals?
Technical documentation includes the MRK Series 19" Gangable Enclosure A&E Specification Sheet and various CAD/Revit models for system integration.