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Middle Atlantic Products® MRK Series 44 RU 31" Deep Rack DVR Configured
Middle Atlantic Products® MRK Series 44 RU 31" Deep Rack DVR Configured 0
Middle Atlantic Products® MRK Series 44 RU 31" Deep Rack DVR Configured 1

Middle Atlantic Products® MRK Series 44 RU 31" Deep Rack DVR Configured

Model #: MRK-4431-DVR
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.
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Get to know this product.

  • Fully welded construction for strength
  • Racks gang together when fully loaded
  • Includes 64% open front door, 79% open split rear door, 64% open top
  • Includes LACE-OP lacer strip, 4 straight & 2 offset lacer bars, 12 Velcro straps
  • Includes one each 1 space and 2 space brush grommet panel, and leveling feet
  • Includes 20A, 20 outlet corded power strip (PDT-2020C-NS)
  • Includes front and rear 10-32 threaded rackrail and 100 rack screws
  • Includes side panels

EIA compliant 19” gangable equipment rack shall be Middle Atlantic Products model # MRK-4431-DVR. Overall dimensions of rack shall be 83-1/8" H x 23-5/16" W x 31-2/5" D. Useable height shall be 44 rackspaces, useable depth shall be 29". 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, perforated vented front door shall be 18-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 mounting holes in universal EIA spacing, black e-coat finish and numbered rackspaces. Rack shall include 100 qty. 10-32 mounting screws. Rack shall be equipped with one vertical lacer strip, Middle Atlantic Products model # LACE-44-OP. The LACE-44-OP is 3-1/4” wide and the useable height is 44 rackspaces. Rack shall also include four ‘L’ shaped straight and two 4” offset horizontal lacer bars and twelve, 8” Velcro® straps for cable management. Models intended for ganging (MRK-4431-DVR -AB) shall include ganging hardware for multi-bay installations. 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 include a high-density thin power distribution and shall be Middle Atlantic Products model # PDT-2020C-NS with 20 outlets and 20 amps. Thin power distribution shall be 72-3/4” long x 1” deep x 1.9” wide. J-Box shall be 2” deep x 2” wide. Thin power distribution shall feature 20 NEMA 5-20R outlets. Corded power strip includes 20 amp protection and mounting hardware. Corded model shall be terminated with 10 foot power cord and NEMA 5-20P plug. PDT Series shall feature a black anodized finish. MRK and PDT Series shall be UL Listed in the US and Canada. MRK-4431-DVR shall be GREENGUARD Indoor Air Quality Certified for Children and Schools. MRK-4431-DVR shall be RoHS EU Directive 2002/95/EC compliant. MRK-4431-DVR shall be manufactured by an ISO 9001 and ISO 14001 registered company. PDT-2020C-NS shall be warrantied to be free from defects in material or workmanship under normal use and conditions for a period of 3 years. 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 Depth29
Usable Height77.125
Panel Width19
Capacity Weight (US)10000
Rack Units44
Rackrail Type10-32
Seismic Load Capacity1050
Static Load Capacity10000
UL Load Capacity2500
Seismic RatingYes
UL Listing No.E173107

Misc. Specs

Depth (in.)31.4
Width (in.)22
Height (in.)83.13
Number of Doors1
Weight Capacity (lbs.)10000
Manufacturer WarrantyLimited Lifetime
WarningProposition 65 Warning for California Residents