Middle Atlantic 2 BAY Seismic RIB DRK 42D 24H - SRB-2-DRK-4224

Middle Atlantic SRB-2-DRK-4224 2-Bay Seismic Riser Base for DRK Rack Systems

Overview

The Middle Atlantic SRB-2-DRK-4224 is a two-bay seismic riser base engineered for DRK-series rack deployments where ground-level compliance with seismic load codes is a hard requirement — not a checkbox. Measuring 60.03 in. wide × 42 in. deep × 24 in. tall and rated to carry 1,750 lbs of static load, this base is built for mission-critical head-end rooms, broadcast infrastructure, and healthcare facilities operating under OSHPD or ASCE 7-10 seismic mandates. If you are specifying rack infrastructure for California hospital construction or any jurisdiction that enforces ASCE 7-10, the SRB-2-DRK-4224 (often searched as SRB 2 DRK 4224) is one of the few bases that arrives with the paperwork to match the hardware.

Key Features

• 1,750 lb Seismic Load Rating: The base supports up to 1,750 lbs (793.8 kg) of seismic load — not just static dead weight. In a two-bay DRK configuration loaded with dense AV or security electronics, this margin is meaningful. You are not retrofitting a standard base and hoping it holds; this is purpose-rated.
• OSHPD Certification (No. 96-01027): California's Office of Statewide Health Planning and Development pre-approves this base for use in licensed healthcare facilities. That certification number on the submittal eliminates a round-trip review with the authority having jurisdiction. For hospital head-end rooms or nurse-call backbone racks, this is the spec-in, approve-once path.
• ASCE 7-10 Compliance: ASCE 7-10 is the structural load standard referenced by IBC and most state building codes for nonstructural component anchorage. Specifying a base that already documents ASCE 7-10 compliance shifts the burden of proof off the integrator and onto the manufacturer's test data.
• 42-Inch Depth: At 42 in. (106.7 cm), this base accommodates DRK racks at full depth without overhang or custom shimming. For racks loaded with deep UPS units, patch infrastructure, or rear-mounted PDUs, depth-matched bases prevent the rocking moment that undermines seismic performance at the base-to-rack interface.
• Two-Bay Configuration (60.03 in. Wide): Side-by-side dual-rack deployments on a shared seismic base simplify floor penetration planning — one anchor pattern, one submittal, one inspection. The 60.03 in. (152.5 cm) width accommodates two standard 24-in.-wide DRK bays with the structural material between them accounted for.
• 24-Inch Riser Height: The 24 in. (61 cm) riser height elevates rack equipment above finished floor level, which matters in data rooms and mechanical spaces where cable management, underfloor air distribution, or flood risk drive the slab-to-equipment clearance requirement.
• Textured Black Powder Coat Finish: The powder coat finish on the welded steel frame is not decorative — it provides a corrosion barrier appropriate for mechanical rooms, where humidity and airborne particulates degrade bare metal over the 10–20 year lifecycle of a rack installation.
• DRK Series Compatibility: The SRB-2-DRK-4224 is designed specifically for Middle Atlantic's DRK rack series. If your project specifies DRK racks, this base is the matched component — no field-drilling or adapter kits required to achieve a compliant, warranted installation.

Integration and Compatibility

This riser base is designed exclusively for the Middle Atlantic DRK rack series. It is not a universal base and should not be paired with other rack families without verifying dimensional compatibility through the manufacturer. Two-bay seismic bases require coordinated floor anchoring — consult structural drawings for anchor bolt pattern and concrete embedment requirements specific to the seismic zone and occupancy category of the installation. For integrators specifying complete rack infrastructure, pair this base with matching rack accessories from the DRK line to maintain system-level seismic compliance documentation. If you are designing rack rooms for healthcare or government facilities, review the network rack cabinets category for the full DRK enclosure lineup that mounts to this base. For projects where seismic compliance must extend to the PDU and cable management level, coordinate with your structural engineer on total rack assembly weight — the 1,750 lb rating applies to the base-to-floor interface, and loaded rack weight must be verified against that ceiling before finalizing the equipment list. Facilities operating under rack power distribution constraints should account for PDU weight in the load calculation, as dense power distribution in a fully populated two-bay DRK system can approach the rated limit.

Frequently Asked Questions

Q: What rack series is the SRB-2-DRK-4224 compatible with?

A: The SRB-2-DRK-4224 is designed specifically for Middle Atlantic's DRK rack series. It is not a universal riser base — verify dimensional compatibility before pairing with any other rack line.

Q: What is the seismic load capacity of the SRB-2-DRK-4224?

A: The SRB-2-DRK-4224 is rated for a seismic load capacity of 1,750 lbs (793.8 kg). This is the seismic-rated capacity, not simply a static weight limit.

Q: Is the SRB-2-DRK-4224 approved for use in California healthcare facilities?

A: Yes. The SRB-2-DRK-4224 carries OSHPD certification number 96-01027, which is the Office of Statewide Health Planning and Development pre-approval required for use in California licensed healthcare facility construction.

Q: What seismic standard does the SRB-2-DRK-4224 comply with?

A: The SRB-2-DRK-4224 is compliant with ASCE 7-10, the structural load standard for nonstructural component anchorage referenced by the International Building Code and most state building codes.

Q: How many rack bays does the SRB-2-DRK-4224 support?

A: The SRB-2-DRK-4224 supports two rack bays simultaneously, with an overall width of 60.03 in. (152.5 cm) to accommodate a side-by-side dual DRK rack configuration.

Q: What are the overall dimensions of the SRB-2-DRK-4224?

A: The SRB-2-DRK-4224 measures 60.03 in. wide × 42 in. deep × 24 in. tall (152.5 cm × 106.7 cm × 61 cm). Shipping weight is 138 lbs (62.6 kg).

Karl Wilson

When a project spec sheet calls for OSHPD-compliant rack mounting, the SRB-2-DRK-4224 is one of the few bases I've seen that comes with a certification number you can drop directly into a submittal package — OSHPD No. 96-01027 — without having to commission independent seismic testing or wait on the AHJ to accept a manufacturer's letter of compliance. That alone justifies the spec on any California hospital or clinic build where the rack room is inside the OSHPD envelope.

Technical Highlights:

• 1,750 lb Seismic Load Capacity: At 793.8 kg rated seismic load across two bays, this base handles a fully populated pair of DRK racks loaded with dense switching, UPS, and security head-end gear without approaching the structural limit — assuming you stay under the per-bay weight ceiling for the DRK enclosures themselves.
• ASCE 7-10 Rated: ASCE 7-10 is the nonstructural component anchorage standard baked into IBC and most state amendments. Documenting compliance at the component level — not just the room level — is what survives a structural peer review on a design-build project.
• 42-Inch Depth Match: The 42 in. depth is not arbitrary — it matches the DRK rack footprint exactly, so the base-to-rack interface is flush and the seismic performance is not compromised by a cantilever overhang that would shift the center of gravity forward of the anchor pattern.

Deployment Considerations:

• Floor anchoring is the integrator's responsibility — the base provides the certified structural element, but the anchor bolt pattern, embedment depth, and concrete strength requirements must be coordinated with the project's structural engineer of record, particularly in higher seismic design categories (SDC D/E/F).
• At 138 lbs shipping weight and 60.03 in. wide, this is not a one-person install — plan for a two-person crew and a pallet jack or furniture dolly rated for the combined base-plus-rack weight before the racks are loaded.

The SRB-2-DRK-4224 is the right specification for new hospital construction, large clinic expansions, or any government facility in a seismically active jurisdiction where the AHJ will pull the submittal package and verify certification numbers. It is not the right call for a standard commercial office rack room where seismic compliance is not a code requirement — the cost and floor space premium are not justified outside a regulated occupancy.