Hammond DRZ42377 44U 23-Inch Seismic Zone 4 Open Frame Rack
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Create Free Business AccountKey Features
- Independently tested and certified to Telcordia GR-63-CORE Zone 4 seismic standards (report DA-1999) for Zone 3 and Zone 4 installations.
- UL2416 listed rack with 2000 lb load rating; UL file E474597. Seismic rated to 800 lb dynamic load with bolt-down kit.
- 44U of usable space: 77.12 in (1959 mm) mounting height, 23.00 in (584 mm) mounting width, 6.00 in (152 mm) mounting depth.
- 10-gauge welded mild steel construction with RAL9005 black powder coat (GREENGUARD, TSCA, RoHS compliant).
- Double-tapped 10-32 rails with 10-32 E.I.A. spacing front and rear and hole-style rack unit indicators.
- Two 10-32 x 1/2 in front ground studs plus two studs inside the top for integrated bonding and grounding.
- Freestanding structural base with bolt-down capability; side mounting and ganging provisions for cable managers and multi-rack rows.
- TAA-compliant and USMCA compliant, manufactured in Canada; convertible to four-post with the FPRK kit (two racks required).
The DRZ42377 is a 44U two-post open frame relay rack from the DRZ4 Series, built for telecom central offices, carrier facilities, critical infrastructure and data centers that must document certified seismic performance. It uses 23.00 in (584 mm) mounting width rails, making it suited to 23-inch telecom equipment rather than 19-inch EIA hardware.
Construction is 10-gauge welded mild steel with a RAL9005 black powder coat thin-film finish. The welded framework, structural base and freestanding, bolt-down design were part of the configuration independently tested under Telcordia GR-63-CORE Section 4.4.1 Zone 4 test severity (Telcordia report DA-1999), where the DRZ4 relay rack conformed to requirements for no permanent structural or mechanical damage, maximum deflection under 75 mm, natural mechanical frequency above 2.0 Hz, welded framework construction and base mounting without auxiliary support. The series is also UL2416 listed with a 2000 lb load rating (UL file E474597) and is seismic rated to 800 lb dynamic load with a bolt-down kit in accordance with GR-63-CORE.
Overall dimensions are 84.00 in x 26.75 in x 18.00 in (2,134 mm x 679 mm x 457 mm), with 77.12 in (1959 mm) of 44U mounting height and 6.00 in (152 mm) mounting depth. Shipping weight is 85 lbs (38.56 kg).
- Double-tapped 10-32 rails with 10-32 E.I.A. spacing front and rear, plus hole rack unit indicators
- Two 10-32 x 1/2 in ground studs at the front and two 10-32 x 1/2 in studs inside the top for bonding
- Base bolt-down holes and mounting provisions for a standard relay rack cable manager
DRZ42377 is TAA-compliant, USMCA compliant, made in Canada, and RoHS and REACH compliant. Two racks can be converted to a four-post configuration with the Four Post Rack Kit (FPRK), and the RIK23Z4 isolation kit matches the 23-inch frame.
Ideal For
- Telecom central offices and carrier facilities
- Seismic Zone 3 and Zone 4 installations requiring GR-63-CORE certification
- Data centers needing certified seismic compliance
- Critical infrastructure, utility networks and NEBS-compliant systems
- Government and regulated environments with bolt-down rack requirements
Overview
| Series | DRZ4 Series |
| Rack Type | Open Frame Rack |
| Description | 44U 2-Post Seismic Zone-4 Rack |
| Part Number | DRZ42377 |
| Four-Post Conversion | Two racks plus Four Post Rack Kit (FPRK) |
| Matching Rack Isolation Kit | RIK23Z4 |
| Similar Size IBC-Seismic Alternative | DNRR2377HDWB |
Dimensions
| Overall Depth | 18.00 in (457 mm) |
| Overall Width | 26.75 in (679 mm) |
| Overall Height | 84.00 in (2134 mm) |
| Size H X W X D | 84 in x 26.75 in x 18 in (2,134 mm x 679 mm x 457 mm) |
Electrical
| Ground Studs | 2X 10-32 x 1/2 in ground studs, front only |
| Additional Studs | 2X 10-32 x 1/2 in studs inside top |
Identifiers
| UPC | 623980659800 |
| UNSPSC | 43223308 |
| GTIN-14 | 00623980659800 |
| UPC W/o Check Digit | 62398065980 |
Rack Mounting
| Rail Type | Tapped 10-32, double-tapped |
| Rack Units | 44U |
| Hole Spacing | 10-32 E.I.A. spacing, front and rear |
| Mounting Depth | 6.00 in (152 mm) |
| Mounting Width | 23.00 in (584 mm) |
| Mounting Height | 77.12 in (1959 mm) |
| Base Mounting Holes | 4X 0.75 in (19 mm) dia. and 4X 0.28 in (7 mm) dia. |
| Rack Unit Indicator | Hole Indicator |
| Cable Manager Provision | Mounting for standard relay rack cable manager |
Packaging & Shipping
| ECCN | EAR99 |
| Tariff Code | 9403.10.0040 |
| Shipping Weight | 85 lbs (38.56 kg) |
Construction & Finish
| Finish | Black powder coat, painted black thin film |
| Material | Mild Steel |
| Paint Color | RAL9005 Black |
| Load Capacity | 2000 lb (UL2416 rating) |
| Gauge / Construction | 10-gauge welded steel |
| Seismic Dynamic Load | 800 lb with bolt-down kit, per GR-63-CORE |
Environmental & Protection
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
| Finish Compliance | GREENGUARD, TSCA, RoHS compliant |
Compliance & Certifications
| Standards | cULus, Telcordia, Zone 4, TAA-compliant |
| UL File # | E474597 |
| USMCA Compliant | Yes |
| Seismic Certification | Telcordia GR-63-CORE Section 4.4.1 Zone 4 test severity, report DA-1999, Issue 2, November 2018 |
| GR-63-CORE Criteria Met | R4-68 no permanent structural/mechanical damage; R4-69 deflection less than 75 mm; R4-70 natural frequency greater than 2.0 Hz; O4-74 welded framework; R4-75 base mounting without auxiliary support |
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Frequently Asked Questions
Is the DRZ42377 a 19-inch or 23-inch rack?▾
This part has 23.00 in (584 mm) mounting width rails, so it accepts 23-inch rack equipment. Its overall width is 26.75 in (679 mm).
What seismic certification does DRZ42377 carry?▾
The DRZ4 relay rack was independently tested and certified to Telcordia GR-63-CORE Section 4.4.1 Zone 4 test severity, documented in Telcordia report DA-1999 (Issue 2, November 2018). It conformed to the requirements for no permanent damage, deflection under 75 mm, natural frequency above 2.0 Hz, welded framework construction and base mounting without auxiliary support.
How much equipment can it hold?▾
The series is UL2416 listed with a 2000 lb load rating (UL file E474597), and is seismic rated to 800 lb dynamic load when installed with a bolt-down kit in accordance with GR-63-CORE.
How many rack units does it provide?▾
44U, with 77.12 in (1959 mm) of mounting height and 6.00 in (152 mm) mounting depth on double-tapped 10-32 rails with hole-style rack unit indicators.
Does it have to be bolted to the floor?▾
The rack has a freestanding structural base with bolt-down capability, and the base includes 0.75 in (19 mm) and 0.28 in (7 mm) diameter holes. A bolt-down kit is required for the 800 lb seismic dynamic load rating.
Can DRZ42377 be used as a four-post rack?▾
Yes. Two racks plus the Four Post Rack Kit (FPRK) convert the product into a four-post rack.
Is it suitable for government procurement?▾
It is TAA-compliant and USMCA compliant, with country of origin Canada, ECCN EAR99 and tariff code 9403.10.0040.
