Middle Atlantic ERK Stand-Alone Enclosures
Design The Perfect Enclosure For Your Needs
QMA-ERK-1825
QMA-ERK-1825LRD
QMA-ERK-10FT
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
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 | |
| QMA-ERK-1825 | 18 | 35.625" | 22" | 25" | Black | |
| QMA-ERK-2120 | 21 | 40.875" | 22" | 20" | Black | |
| QMA-ERK-2125 | 21 | 40.875" | 22" | 25" | Black | |
| QMA-ERK-2720 | 27 | 51.375" | 22" | 20" | Black | |
| QMA-ERK-2725 | 27 | 51.375" | 22" | 25" | Black | |
| QMA-ERK-3520 | 35 | 65.375" | 22" | 20" | Black | |
| QMA-ERK-3525 | 35 | 65.375" | 22" | 25" | Black | |
| QMA-ERK-4020 | 40 | 74.125" | 22" | 20" | Black | |
| QMA-ERK-4025 | 40 | 74.125" | 22" | 25" | Black | |
| QMA-ERK-4420 | 44 | 81.125" | 22" | 20" | Black | |
| QMA-ERK-4425 | 44 | 81.125" | 22" | 25" | Black | |
| Middle Atlantic ERK Enclosures without Rear Door | ||||||
|---|---|---|---|---|---|---|
| Part # | Ru | Height | Width | Depth | Color | Price |
| QMA-ERK-1820LRD | 18 | 35.625" | 22" | 20" | Black | |
| QMA-ERK-1825LRD | 18 | 35.625" | 22" | 25" | Black | |
| QMA-ERK-2120LRD | 21 | 40.875" | 22" | 20" | Black | |
| QMA-ERK-2125LRD | 21 | 40.875" | 22" | 25" | Black | |
| QMA-ERK-2720LRD | 27 | 51.375" | 22" | 20" | Black | |
| QMA-ERK-2725LRD | 27 | 51.375" | 22" | 25" | Black | |
| QMA-ERK-3520LRD | 35 | 65.375" | 22" | 20" | Black | |
| QMA-ERK-3525LRD | 35 | 65.375" | 22" | 25" | Black | |
| QMA-ERK-4020LRD | 40 | 74.125" | 22" | 20" | Black | |
| QMA-ERK-4025LRD | 40 | 74.125" | 22" | 25" | Black | |
| QMA-ERK-4420LRD | 44 | 81.125" | 22" | 20" | Black | |
| QMA-ERK-4425LRD | 44 | 81.125" | 22" | 25" | Black | |
| 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 | |
| QMA-ERK-6FT-440CFM | Two 6" Fans | Not Included | 440 | ERK 35,40, 44 RU Models | Black | |
| QMA-ERK-4FT-285CFM | Three 4.5" Fans | Not Included | 285 | ERK 35,40, 44 RU Models | Black | |
| 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 | |
| QMA-ERK-DT | ERK Top With Duct Cool Adapter | ERK 35,40, 44 RU Models | Black | |
| 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 | Manufacturer Direct |
| MA-ERK-RR21 | ERK 21RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) | 21 RU Enclosures | 11-Gauge, 10-32 Threaded | Manufacturer Direct |
| MA-ERK-RR27 | ERK 27RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) | 27 RU Enclosures | 11-Gauge, 10-32 Threaded | Manufacturer Direct |
| MA-ERK-RR35 | ERK 35RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) | 35 RU Enclosures | 11-Gauge, 10-32 Threaded | Manufacturer Direct |
| MA-ERK-RR40 | ERK 40RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) | 40 RU Enclosures | 11-Gauge, 10-32 Threaded | Manufacturer Direct |
| MA-ERK-RR44 | ERK 44RU Rear Rail Option (Sold In Pairs, Includes Mounting Hardware) | 44 RU Enclosures | 11-Gauge, 10-32 Threaded | Manufacturer Direct |
| QMA-ERK-VRD-18 | ERK 18RU Rear Vented Door Option | 18 RU Enclosures | Provides 64% Open Area | |
| QMA-ERK-VRD-21 | ERK 21RU Rear Vented Door Option | 21 RU Enclosures | Provides 64% Open Area | |
| QMA-ERK-VRD-27 | ERK 27RU Rear Vented Door Option | 27 RU Enclosures | Provides 64% Open Area | |
| QMA-ERK-VRD-35 | ERK 35RU Rear Vented Door Option | 35 RU Enclosures | Provides 64% Open Area | |
| QMA-ERK-VRD-40 | ERK 40RU Rear Vented Door Option | 40 RU Enclosures | Provides 64% Open Area | |
| QMA-ERK-VRD-44 | ERK 44RU Rear Vented Door Option | 44 RU Enclosures | Provides 64% Open Area | |
| QMA-ERK-Z4 | ERK Series Seismic Brackets | ERK Enclosures | Seismic Certified Mounting | |
| QMA-CBS-ERK-20 | ERK Commercial Grade Caster Base | 20" Deep Enclosures | 1,300 lbs. Weight Capacity | |
| QMA-CBS-ERK-20R | ERK Fine Floor Caster Base | 20" Deep Enclosures | 700 lbs. Weight Capacity | |
| QMA-CBS-ERK-25 | ERK Commercial Grade Caster Base | 25" Deep Enclosures | 1,300 lbs. Weight Capacity | |
| QMA-CBS-ERK-25R | ERK Fine Floor Caster Base | 25" Deep Enclosures | 700 lbs. Weight Capacity | |
- 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
- Made in the U.S.A.
Middle Atlantic ERK Drawing Dimensions (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 |
ENCLOSURE APPLICATION GUIDE -
MANUALS & USER GUIDES -
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