Middle Atlantic MRK-4431-AV
44-Space, 77" H x 31" D Welded Gangable Equipment Rack (A/V Configuration, with Side Panels)

OUR PART #  MRK-4431-AV


A/V Enclosure-Specific Features:

  • Integrated fan top with proportional speed fan controller
  • Configurable rear door with bottom vent, solid locking front door
  • 3.25” wide vertical lacer strip
  • Six horizontal lacer bars
  • Twelve 8” Velcro® cable management straps
  • Thin power strip, 20 Amp, 20 outlet with cord
  • Leveling feet
  • 10-32 mounting hardware (100 quantity)
  • Side panels optional
  • Ganging hardware optional for multi-bay installations

Features:

  • Fully welded construction, solid sides
  • 2,500 lb. weight capacity
  • UL Listed in the US and Canada
  • Seismic certified (UBC 1997 & CBC 1998 Zone 4; IBC 2000, IBC 2003,ASCE 7 - 02, NFPA 5000 Seismic Use Group III) for protecting 650 lbs. ofessential equipment when used in conjunction with MiddleAtlantic's MRK-Z4 brackets
  • OSHPD approved for fixed equipment anchorage in California healthcarefacilities
  • 1/2", 3/4", 1" and 1-1/2" electrical knockouts found on removable splitrear plates, top knockout plate additionally includes UHF/VHF antenna knockouts
  • 2 pairs of wider rack rails provide more interior room
  • 16-gauge seamless steel sides,  14-gauge steel tops & bottoms
  • Laser-cut 1/8" thick internal steel braces for strength
  • Large cable entry in bottom
  • Grounding and bonding stud installed in base
  • Configurable open top accepts a number of top options
  • Keylocked solid rear door standard
  • Finished in a durable black textured powder coat

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Middle Atlantic WS4-M31-24 WS Series Multi-Bay Laminate Writing Shelf Laminated 1" Thick 4 Bay Writing Shelf with Durable T-mold Edge and Cable Grommets

Middle Atlantic WS4-M31-24 WS Series Multi-Bay Laminate Writing Shelf Laminated 1" Thick 4 Bay Writing Shelf with Durable T-mold Edge and Cable Grommets

The WS Series writing shelves from Middle Atlantic provide a secure work surface for their WRK, MRK, VRK and VMRK Series enclosures when used in multi-bay applications. This model, the WS4-M31-24 is intended to be used as a 4 Bay Writing ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic PVFD-44 Plexi Vented Front Door, 44-space

Middle Atlantic PVFD-44 Plexi Vented Front Door, 44-space

Offered in lightly smoked plexiglass, fully vented, vented plexi, NEW large perforated vented and solid configurations. Beveled corners provide a stylistically modern appearance, while hinging either left or right. Large perf door has 68% ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic SPN44-312 Pair of Side Panels/Black 44-space 31-3.2" deep

Middle Atlantic SPN44-312 Pair of Side Panels/Black 44-space 31-3.2" deep

Middle Atlantic's SPN series side panels fit all WRK, MRK, VMRK and VRK, series enclosures. These side panels feature stylish beveled corners to match the aesthetics of the enclosure, easily lift on and off, and include an internal ...
Log In For Price
Available to Order! Item usually SHIPS in 2 business days
Middle Atlantic PFD44-MID-ATLANTIC 44-Space Plexiglass Front Door

Middle Atlantic PFD44-MID-ATLANTIC 44-Space Plexiglass Front Door

Offered in lightly smoked plexiglass, fully vented, vented plexi, NEW large perforated vented and solid configurations. Beveled corners provide a stylistically modern appearance, while hinging either left or right. Large perf door has 68% ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic WS2-M31-18  2-Bay 18" Deep Writing Shelf for 31" Deep MRK and VRK Racks

Middle Atlantic WS2-M31-18 2-Bay 18" Deep Writing Shelf for 31" Deep MRK and VRK Racks

Designed to provide an ergonomic work space, the Middle Atlantic WS2-M31-18 writing shelf is designed for Middle Atlantic's 31" deep MRK and VRK Series enclosures. Offered in a two-bay size to span multiple ganged ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic MW10FT-FC Integrated Rack Fan Top for MRK, WRK, DRK, VRK, VMRK Racks, One 10" fan 550 CFM

Middle Atlantic MW10FT-FC Integrated Rack Fan Top for MRK, WRK, DRK, VRK, VMRK Racks, One 10" fan 550 CFM

NOTE:  A 4-fan top is pictured, this is a single fan top. Integrated fan tops save time and money, and simplify ordering Includes proportional speed thermostatic fan control to ensure that fans only run when needed, extending fan ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic VFD-44 Front Door 44Sp, Vented

Middle Atlantic VFD-44 Front Door 44Sp, Vented

Offered in lightly smoked plexiglass, fully vented, vented plexi, NEW large perforated vented and solid configurations. Beveled corners provide a stylistically modern appearance, while hinging either left or right. Large perf door has 68% ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic FD-44 44-Space Solid Front Door

Middle Atlantic FD-44 44-Space Solid Front Door

The FD-44 is offered in lightly smoked plexiglass, fully vented, vented plexi, large perforated vented and solid configurations. Beveled corners provide a stylistically modern appearance, while hinging either left or right. Large ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic PDT2020C-NS PDT-2020C-NS

Middle Atlantic PDT2020C-NS PDT-2020C-NS

PDT Series Thin Power Strips take up minimal space inside a rack and feature a unique design that allows for isolated ground configurability.  Dual circuit models can be configured to operate as a single circuit and all models are ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic LACE-44-OP 3.25" Wide, 44-Space Cable Lacer Strip (Qty. 6, with Tie Posts)

Middle Atlantic LACE-44-OP 3.25" Wide, 44-Space Cable Lacer Strip (Qty. 6, with Tie Posts)

Perforated steel lacer strips mount vertically to rackrail brackets and provide many locations for securing cable ties.  Lacer strips can be cut down easily to smaller sizes.  Some lacer strips also accept cage nuts or mounting ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic CBS-MRK-31 Castor Kit MRK Rack/31"Deep

Middle Atlantic CBS-MRK-31 Castor Kit MRK Rack/31"Deep

With a 1300 lb. capacity, our commercial grade caster bases are equipped with heavy duty non-locking 3" swivel wheels and are UL listed in the US and Canada. NEW fine floor caster bases now available with a 700 lb. weight capacity. Each ...
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic PROMRK-RR44 44 Space Cage Nut Style Rack Rail Pair for MRK Series Racks

Middle Atlantic PROMRK-RR44 44 Space Cage Nut Style Rack Rail Pair for MRK Series Racks

44 Space Cage Nut Style Rack Rail Pair for MRK Series Racks
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Middle Atlantic MV-RR44 44 Space Rear Rack Rail for MRK Racks

Middle Atlantic MV-RR44 44 Space Rear Rack Rail for MRK Racks

11-gauge, 10-32 threaded, sold in pairs. All mounting hardware included.
Log In For Price
Available to Order! Item usually SHIPS in 6-10 business days
Add to Cart

We're sorry, only of this item available



Call a Sales Pro at for more information

Serving Contractors, Dealers, and Installers Since 1977

Contact: 1-800-828-0509 / Hours: Mon - Fri 7:00AM - 7:00PM