For screen reader problems with this website, please call715-343-80007 1 5 3 4 3 8 0 0 0Standard carrier rates apply to texts.

Middle Atlantic Products® MRK Series 44 RU 42" Deep Cage Nut Rack
Middle Atlantic Products® MRK Series 44 RU 42" Deep Cage Nut Rack 0
Middle Atlantic Products® MRK Series 44 RU 42" Deep Cage Nut Rack 1

Middle Atlantic Products® MRK Series 44 RU 42" Deep Cage Nut Rack

Model #: MRK-4442PROLRD
Middle Atlantic Products Inc.
At a Glance
Specify MRK series when you need an enclosure built to perform like a workhorse. Its rugged, space-saving design and high seismic load rating make it a favorite of installing contractors, particularly on larger-scale multi-bay jobs. The MRK series also offers seismic certification and open or removable sides.
Call for Best Price

Get to know this product.

  • Fully welded construction for strength
  • Racks gang together when fully loaded
  • Multiple lacing points and slotted rail brackets for cable management flexibility
  • Includes two pair cage nut style rackrail

EIA compliant 19” gangable equipment rack shall be Middle Atlantic Products model # MRK-4442PRO (refer to chart). Overall dimensions shall be 83.125”H x 22”W x 42”D (refer to chart). Usable height shall be 77.125 rackspaces, usable depth shall be 39.6” (refer to chart). Fully welded construction shall provide a static capacity of 10,000 lbs. and a UL Listed load capacity of 2,500 lbs. Rack shall be constructed of the following materials: top and bottom shall be 14-gauge steel, horizontal braces shall be 16-gauge steel and all structural elements shall be finished in a durable black powder coat. Rack shall include a locking, latching rear door. Rack shall come equipped with two pairs of 11-gauge steel rackrail with tapped 10-32 mounting holes in universal EIA spacing, black e-coat finish and numbered rackspaces (select models also available with cage nut style rackrail, refer to chart). Rack shall have removable split rear knockout panels with 1/2”, 3/4”, 1” and 1-1/2” electrical knockouts and top BNC knockouts for UHF/VHF antennae. Grounding and bonding stud shall be 1/4-20 threaded, installed in base of enclosure. MRK Series enclosures shall satisfy the 2007 & 2010 CBC; 2006, 2009 & 2012 IBC; ASCE 7-05 (2005 Edition) & ASCE 7-10 (2010 Edition) and the 2006 & 2009 editions of NFPA 5000 for use in areas of high seismicity, Seismic Use Group III, Zone 4 or Seismic Design Category (SDC) “D” with lateral force requirements for protecting 1,050 lbs. of essential equipment in locations with the highest level of seismicity and top floor or rooftop installations with an Importance factor (Ip) of 1.5 when used with MRK-Z4 seismic floor anchor bracket. Rack shall be OSHPD approved for fixed equipment anchorage in California healthcare facilities. Rack shall be UL Listed in the US and Canada. MRK shall be GREENGUARD Gold certified. MRK enclosure shall comply with the requirements of RoHS EU Directive 2002 / 95 / EC. MRK shall be manufactured by an ISO 9001 and ISO 14001 registered company. MRK enclosure shall be warrantied to be free from defects in material or workmanship under normal use and conditions for the lifetime of the rack.

Useful Documents


FinishBlack Powder Coat
UL Standards TestedUL1678
Usable Depth39.6
Usable Height77.125
Panel Width19
Capacity Weight (US)10000
Rack Units44
Rackrail TypeCage Nut
Seismic Load Capacity1050
Static Load Capacity10000
UL Load Capacity2500
UL Listing No.E173107

Misc. Specs

Depth (in.)42
Width (in.)22
Height (in.)83.13
Number of Doors1
Weight Capacity (lbs.)10000
Manufacturer WarrantyLimited Lifetime
WarningProposition 65 Warning for California Residents