• QMA-ERK-1820LRD
  • QMA-ERK-1820
  • QMA-ERK-4QFT-FC
  • QMA-ERK-10FT-FC
  • QMA-ERK-10FT
  • QMA-ERK-4FT
  • Middle Atlantic 10 inch fan icon
  • Middle Atlantic 4.5 inch fan icon
  • Middle Atlantic quiet fan icon
  • QMA-ERK-DT
  • QMA-ERK-ST
  • QMA-ERK-VT
  • QMA-ERK-VRD-18
  • QMA-CBS-ERK-20
  • drawing of Middle Atlantic ERK cable routing icon
  • close up of Middle Atlantic ERK rack rails icon
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Middle Atlantic ERK Stand-Alone Enclosures

Design The Perfect Enclosure For Your Needs

QMA-ERK-1825
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QMA-ERK-1825LRD
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QMA-ERK-10FT
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What's special about these configurable enclosures?

  • High quality with a large range of customizable options and accessories, for creating an unique enclosure tailored around meeting your specifications and needs.
  • Fully welded construction is reinforced with 1/8" structural steel internal braces to provide the highest quality in structural support, even under full loads.
  • Grounding and bonding studs are preinstalled into the base to help you electrically ground and bond equipment, per NEBS and NEC standards.
  • Click for More Features
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  • RoHS CompliantUL

Middle Atlantic's new line of ERK Stand-Alone Enclosures provide you with several different options when it comes to size, doors, casters, ventilation, rails, and cooling. For users who need a quick answer to their needs, with all the essentials needed for getting started, the ERK series also provides a line of ready to use preconfigured enclosures.

Middle Atlantic ERK Enclosures with Rear Door
Part # Ru Height Width Depth Color Price
QMA-ERK-1820 18 35.625" 22" 20" Black
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QMA-ERK-1825 18 35.625" 22" 25" Black
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QMA-ERK-2120 21 40.875" 22" 20" Black
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QMA-ERK-2125 21 40.875" 22" 25" Black
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QMA-ERK-2720 27 51.375" 22" 20" Black
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QMA-ERK-2725 27 51.375" 22" 25" Black
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QMA-ERK-3520 35 65.375" 22" 20" Black
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QMA-ERK-3525 35 65.375" 22" 25" Black
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QMA-ERK-4020 40 74.125" 22" 20" Black
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QMA-ERK-4025 40 74.125" 22" 25" Black
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QMA-ERK-4420 44 81.125" 22" 20" Black
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QMA-ERK-4425 44 81.125" 22" 25" Black
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Middle Atlantic ERK Enclosures without Rear Door
Part # Ru Height Width Depth Color Price
QMA-ERK-1820LRD 18 35.625" 22" 20" Black
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QMA-ERK-1825LRD 18 35.625" 22" 25" Black
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QMA-ERK-2120LRD 21 40.875" 22" 20" Black
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QMA-ERK-2125LRD 21 40.875" 22" 25" Black
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QMA-ERK-2720LRD 27 51.375" 22" 20" Black
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QMA-ERK-2725LRD 27 51.375" 22" 25" Black
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QMA-ERK-3520LRD 35 65.375" 22" 20" Black
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QMA-ERK-3525LRD 35 65.375" 22" 25" Black
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QMA-ERK-4020LRD 40 74.125" 22" 20" Black
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QMA-ERK-4025LRD 40 74.125" 22" 25" Black
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QMA-ERK-4420LRD 44 81.125" 22" 20" Black
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QMA-ERK-4425LRD 44 81.125" 22" 25" Black
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ERK Tops with Fan Options
Part # # Of Fans Fan Controller Free Air Cfm Fits Color Price
QMA-ERK-10FT-550CFM One 10" Fan Not Included 550 ERK 35,40, 44 RU Models Black
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QMA-ERK-6FT-440CFM Two 6" Fans Not Included 440 ERK 35,40, 44 RU Models Black
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QMA-ERK-4FT-285CFM Three 4.5" Fans Not Included 285 ERK 35,40, 44 RU Models Black
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ERK Configurable Tops
Part # Description Fits Color Price
QMA-ERK-10FT ERK Top With Cutout For One 10" Fan ERK 35,40, 44 RU Models Black, Granite Gray, Light Gray
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QMA-ERK-DT ERK Top With Duct Cool Adapter ERK 35,40, 44 RU Models Black
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ERK ACCESSORIES
Part # Description Fits Features Price
MA-ERK-RR18 ERK 18RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) 18 RU Enclosures 11-Gauge, 10-32 Threaded
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Manufacturer Direct
MA-ERK-RR21 ERK 21RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) 21 RU Enclosures 11-Gauge, 10-32 Threaded
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Manufacturer Direct
MA-ERK-RR27 ERK 27RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) 27 RU Enclosures 11-Gauge, 10-32 Threaded
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Manufacturer Direct
MA-ERK-RR35 ERK 35RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) 35 RU Enclosures 11-Gauge, 10-32 Threaded
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Manufacturer Direct
MA-ERK-RR40 ERK 40RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) 40 RU Enclosures 11-Gauge, 10-32 Threaded
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Manufacturer Direct
MA-ERK-RR44 ERK 44RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) 44 RU Enclosures 11-Gauge, 10-32 Threaded
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Manufacturer Direct
QMA-ERK-VRD-18 ERK 18RU Rear Vented Door Option 18 RU Enclosures Provides 64% Open Area
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QMA-ERK-VRD-21 ERK 21RU Rear Vented Door Option 21 RU Enclosures Provides 64% Open Area
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QMA-ERK-VRD-27 ERK 27RU Rear Vented Door Option 27 RU Enclosures Provides 64% Open Area
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QMA-ERK-VRD-35 ERK 35RU Rear Vented Door Option 35 RU Enclosures Provides 64% Open Area
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QMA-ERK-VRD-40 ERK 40RU Rear Vented Door Option 40 RU Enclosures Provides 64% Open Area
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QMA-ERK-VRD-44 ERK 44RU Rear Vented Door Option 44 RU Enclosures Provides 64% Open Area
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QMA-ERK-Z4 ERK Series Seismic Brackets ERK Enclosures Seismic Certified Mounting
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QMA-CBS-ERK-20 ERK Commercial Grade Caster Base 20" Deep Enclosures 1,300 lbs. Weight Capacity
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QMA-CBS-ERK-20R ERK Fine Floor Caster Base 20" Deep Enclosures 700 lbs. Weight Capacity
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QMA-CBS-ERK-25 ERK Commercial Grade Caster Base 25" Deep Enclosures 1,300 lbs. Weight Capacity
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QMA-CBS-ERK-25R ERK Fine Floor Caster Base 25" Deep Enclosures 700 lbs. Weight Capacity
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  • Finished in a durable black textured powder coat to protect your enclosure and keep it looking stylish for years to come.
  • Durable steel construction withstands equipment loads of up to 2,500 lbs.
  • One pair of 10-32 tapped, front-mounted and fully adjustable rails are included for safely securing media and network components, with optional rear mounting rails available.
  • Provides 1/2", 3/4", 1" and 1-1/2" electrical knockouts on removable split rear plates, with additional UHF/VHF antenna knockouts on the top plate.
  • Extra large opening on the bottom for cable entry and easy routing.
  • 18, 21 and 27RU enclosures come with a solid preconfigured top, with two 4.5" fan knockouts for easy cooling installation and options.
  • Large range of solid, vented or preconfigured fan tops available for 35, 40 and 44RU enclosures.
  • 35, 40 and 44RU enclosures provide laser cut knockouts in side panels for easy ganging and cable pass-through.
  • Commercial grade caster bases are equipped with 3" diameter swivel wheels which have a weight capacity of 1,300 lbs.
  • New, fine floor caster bases are available with 3" diameter swivel wheels. Made from Dynatread TPR, these casters protect against damaging decorative flooring, and have a weight capacity of 700 lbs.
  • Seismic certified for protecting 650 lbs. of essential equipment when used in conjunction with ERK-Z4 brackets- UBC 1997 & CBC 1998 Zone 4; IBC 2000, IBC 2003, ASCE 7 - 02, NFPA 5000 Seismic Use Group III.
  • cULus listed (enclosures)- File number E173107
  • cULus listed (fan and door assembly)- File number E252615
  • EIA/TIA Compliant
  • RoHS Compliant
  • Proudly made in the USA Made in the USA

    • Middle Atlantic ERK Drawing Dimensions (PDF) PDF

     

      QMA-ERK-1820 QMA-ERK-1825 QMA-ERK-2120 QMA-ERK-2125 QMA-ERK-2720 QMA-ERK-2725
    DIMENSIONS
    Overall Height 36.625" 36.625" 40.875" 40.875" 51.375" 51.375"
    Useable height 31.625" 31.625" 36.875" 36.875" 47.375" 47.375"
    Overall Depth 20.000" 25.000" 20.000" 25.000" 20.000" 25.000"
    Bottom Opening Depth 15.250" 20.250" 15.250" 20.250" 15.250" 20.250"
    Overall Width 22.000" 22.000" 22.000" 22.000" 22.000" 22.000"
    Useable Width 19.250" 19.250" 19.250" 19.250" 19.250" 19.250"
    MATERIAL
    Sides 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel
    Rear Panel 18-Gauge Steel 18-Gauge Steel 18-Gauge Steel 18-Gauge Steel 18-Gauge Steel 18-Gauge Steel
    Top 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel
    Bottom 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel
    Rack Rail (1-pair) 11-Gauge Steel 11-Gauge Steel 11-Gauge Steel 11-Gauge Steel 11-Gauge Steel 11-Gauge Steel

     

      QMA-ERK-3520 QMA-ERK-3525 QMA-ERK-4020 QMA-ERK-4025 QMA-ERK-4420 QMA-ERK-4425
    DIMENSIONS
    Overall Height 65.375" 65.375" 74.125" 74.125" 81.125" 81.125"
    Useable height 61.375" 61.375" 70.125" 70.125" 77.125" 77.125"
    Overall Depth 20.000" 25.000" 20.000" 25.000" 20.000" 25.000"
    Bottom Opening Depth 15.250" 20.250" 15.250" 20.250" 15.250" 20.250"
    Overall Width 22.000" 22.000" 22.000" 22.000" 22.000" 22.000"
    Useable Width 19.250" 19.250" 19.250" 19.250" 19.250" 19.250"
    MATERIAL
    Sides 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel
    Rear Panel 18-Gauge Steel 18-Gauge Steel 18-Gauge Steel 18-Gauge Steel 18-Gauge Steel 18-Gauge Steel
    Top 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel
    Bottom 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel 16-Gauge Steel
    Rack Rail (1-pair) 11-Gauge Steel 11-Gauge Steel 11-Gauge Steel 11-Gauge Steel 11-Gauge Steel 11-Gauge Steel

     

    FANS
    Size 4.5" 4.5" Quiet 6" 10"
    Depth 1.5" 1.5" 1.5" 3.5"
    dB Rating 39 dBA <30 dBA 49 dBA 49 dBA
    CFM 95 50 220 550
    Manuals

     

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