Middle Atlantic SSHD-28 28-Inch Sliding Rack Shelf
Overview
The Middle Atlantic SSHD-28 is a 2RU sliding rack shelf engineered for integrators who need to house deep, heavy equipment in standard 19-inch racks without compromising access or structural integrity. With a 200 lb (90.7 kg) weight capacity and 28.1 inches of usable depth, it handles full-depth servers, UPS units, NVRs, and dense AV processors that standard fixed shelves cannot support. If you're building out a rack accessory kit for a surveillance or AV control room, the SSHD-28 (often searched as SSHD 28) belongs on the short list for any component that needs periodic service access without full rack teardown.
Middle Atlantic is a well-established name in the rackmount hardware market, and the SSHD line reflects the kind of dimensional precision that integrators working to tight rack budgets actually need — mounting depth adjustable from 21.1 to 35.2 inches covers nearly every two-post and four-post rack configuration in the field.
Key Features
- 200 lb (90.7 kg) Weight Capacity: Most sliding shelves top out at 50–100 lbs. The SSHD-28's 200 lb rating means you can run a full-depth NVR, a loaded UPS, or a heavy media server on this shelf without worrying about rail fatigue over time — critical in 24/7 surveillance infrastructure where the rack never gets a break.
- 28.1-Inch Usable Depth: The 28.1-inch usable surface (versus a nominal 28.6-inch total depth) fits virtually all enterprise-class appliances that would otherwise need a dedicated full-depth rack. For context, most 2U rack-mount NVRs and workstations fall in the 18–24 inch range, so this shelf has headroom to spare.
- Adjustable Mounting Depth (21.1–35.2 in): The shelf accommodates racks with a mounting depth anywhere from 21.1 to 35.2 inches. This is the spec that determines whether it actually fits your cabinet — measure your rack's internal rail-to-rail depth before ordering. A 35.2-inch maximum means it works in most open-frame and enclosed four-post racks without modification.
- 2RU Form Factor at 3.5-Inch Height: Two rack units consumed for the shelf itself. Factor this into your rack unit budget before purchasing — in a densely populated 24RU or 32RU rack, two units for a shelf is a real cost. The payoff is slide-out access that eliminates the need to unmount equipment for cabling or maintenance.
- 19-Inch Standard Width: Fits any EIA-310-compliant 19-inch rack without adapters. The 48.3 cm width is the industry-standard figure — no modification, no rail adapters, no surprises on installation day.
- Two Mounting Points: The SSHD-28 uses two mounting points per side. Confirm your rack's hole pattern and rail type before deployment — two-point mounting is sufficient for the rated load but requires that both contact points are secured to solid rail material, not just cage nut strips on flimsy frame stock.
- Black Powder-Coat Finish: Standard black finish matches the majority of commercial rack enclosures. No finish mismatch in mixed-brand rack environments — relevant when the rack itself is visible to clients or when building out a presentation-quality control room.
Integration and Compatibility
The SSHD-28 is compatible with any standard 19-inch EIA rack. The adjustable mounting depth range of 21.1 to 35.2 inches covers the common four-post rack depths used in surveillance control rooms, server closets, and AV equipment bays. When planning a network video recorder installation, use this shelf for NVRs or workstations that need periodic hard drive swaps or cable management access without full removal from the rack. Pair with a rack-mount power strip or UPS for a complete, serviceable rack build — the 200 lb capacity handles both the device and the cabling load without compromise. This shelf is not rated for environments with significant vibration or shock (data centers with cooling airflow are fine; mobile or vehicle rack installations are not the intended use case).
Frequently Asked Questions
Q: What is the maximum weight the SSHD-28 can hold?
A: The SSHD-28 is rated at 200 lbs (90.7 kg) — well above most competing sliding shelves in its class. This rating covers full-depth NVRs, UPS units, and dense AV processors.
Q: What rack depth range does the SSHD-28 support?
A: The mounting depth adjusts from a minimum of 21.1 inches to a maximum of 35.2 inches (89.4 cm), covering the majority of standard two-post and four-post commercial rack enclosures.
Q: How many rack units does the SSHD-28 occupy?
A: The SSHD-28 occupies 2 rack units (2RU) at 3.5 inches of height. Account for this in your rack unit budget before specifying.
Q: Does the SSHD-28 fit a standard 19-inch rack?
A: Yes. The shelf is 19 inches wide (48.3 cm) and designed for EIA-310-compliant 19-inch racks with no adapters or modifications required.
Q: What is the usable depth of the SSHD-28 shelf surface?
A: The usable shelf depth is 28.1 inches (71.4 cm). The overall product depth including hardware is 28.6 inches (72.6 cm).
Q: How many mounting points does the SSHD-28 use?
A: The SSHD-28 uses 2 mounting points. Ensure both contact points are secured to solid rack rail material to achieve the full 200 lb weight capacity rating.
The spec that gets overlooked on sliding shelves is the weight rating — most integrators grab the first 1RU or 2RU slide shelf they find and don't check until something sags or a rail binds under load. The SSHD-28 is rated at 200 lbs, which is roughly double the capacity of a standard sliding shelf, and that margin matters when you're dropping a 40–50 lb NVR on it and the rack lives in a server closet that nobody touches for three years.
Technical Highlights:
- 200 lb Weight Capacity: Handles full-depth NVRs, loaded UPS units, and 2U workstations without rail stress — the 90.7 kg rating gives real headroom for anything in a typical surveillance or AV rack build.
- 28.1-Inch Usable Depth: Most enterprise-class rack appliances fall between 18 and 26 inches deep; 28.1 inches means nothing hangs off the back edge, which is where cable strain and connector damage happen.
- 21.1–35.2-Inch Adjustable Mounting Range: The 14-inch adjustment range is wide enough to cover virtually every standard commercial rack in the field without shims or custom hardware — spec this against your rack's internal rail-to-rail dimension before ordering.
Deployment Considerations:
- Measure your rack's internal mounting depth before ordering — the 21.1-inch minimum means very shallow open-frame racks (under 21 inches rail-to-rail) are not supported, and the 35.2-inch maximum covers most enclosed four-post cabinets.
- The 2RU height cost is real in a densely loaded rack. If you're short on rack space, evaluate whether a fixed shelf at 1RU would serve — the slide-out access only pays off if the equipment actually needs periodic service without full unmounting.
The SSHD-28 fits best in a surveillance control room or security operations center rack where a heavy NVR or recording workstation needs to stay permanently racked but still require periodic hard drive swaps or rear-panel access without a full teardown — exactly the scenario where the 200 lb capacity and 28.1-inch depth earn their keep.
