Middle Atlantic 3RU Adjustable Rackshelf - 19.5-28 Inch Depth

The Middle Atlantic AS3-22 rack mounted shelf is a versatile, high‑quality solution engineered for professionals who demand sturdy support and flexible installation in 19 inch rack systems. Built to accommodate a range of heavy equipment without compromising rack integrity or airflow, this 3RU adjustable rack shelf delivers reliable performance in broadcast studios, post‑production suites, AV rooms, live sound setups, data centers, and IT closets. With a front‑to‑rear mounting adjustment range that spans from 19-1/2 inches to 28 inches deep, it makes it easy to tailor depth to your existing rack configuration and equipment depth. This means you can maximize rack space, simplify cable management, and maintain easy access to front panel controls and rear connectors. The AS3-22 is designed to sit securely inside standard 19” racks, providing a stable, vented surface that supports a broad spectrum of gear from powerful amplifiers and power distribution units to servers, media players, and rackmount consoles. Its vented construction promotes airflow, helping to dissipate heat and extend the life of attached devices in densely populated racks. In short, this shelf blends rugged build quality with practical adjustability, making it a dependable, long‑term fit for professional rack environments.

• Adjustable depth for flexible mounting: The AS3-22 supports a front‑to‑rear depth range from 19.5 inches to 28 inches, enabling precise fitment for equipment of varying depths and allowing you to optimize clearance for cabling and airflow.
• 3U rack height for compact, robust support: Sized at 3U, this shelf delivers substantial surface area while remaining space‑efficient within the rack, ideal for heavier or larger components without sacrificing rack real estate.
• Ventilated design for improved cooling: The shelf’s perforated or vented surface promotes airflow through the enclosure, helping to prevent heat buildup behind equipment and supporting reliable operation in densely populated racks.
• Easy integration with standard 19" racks: Engineered for standard rack installations, the AS3-22 uses conventional front rails and mounting practices, ensuring straightforward installation alongside other 19" hardware.
• Durable, professional‑grade construction: Manufactured by Middle Atlantic, a trusted name in rack solutions, this shelf is built to withstand frequent access, frequent cable routing, and the rigors of daily use in demanding environments.

Technical Details of Middle Atlantic 3RU Adjustable Rackshelf

• Model: AS3-22
• RU height: 3U
• Depth range: 19.5" to 28"
• Minimum rack depth compatibility: 19.5" from front to rear rails
• Ventilated rack shelf for airflow and heat management
• Rack‑mountable design compatible with standard 19" equipment racks

How to install Middle Atlantic 3RU Adjustable Rackshelf

• Confirm your rack’s depth and ensure it meets the minimum 19.5" requirement to accommodate the shelf at the desired depth.
• Power down and disconnect any equipment in the rack before installation for safety and to prevent cable strain during mounting.
• Position the AS3-22 shelf at the intended height within the rack and align it with the front mounting rails. Ensure the shelf is level and centered to prevent distortion or uneven loading.
• Insert the mounting hardware (rack screws or bolts) through the front rails and into the shelf’s mounting points. Use the appropriate fasteners for your rack enclosure and tighten securely, taking care not to overtighten and strip threads.
• Slide the shelf into place and, if your rack supports depth adjustment, slide to the required 19.5"–28" depth range. Recheck alignment and tighten all fasteners after the shelf is positioned correctly.
• Reconnect power and data cables, taking care to organize cables to maintain airflow around the vented shelf and avoid obstructing the rack’s rear pathways. Test fitment with the intended equipment to confirm clearance and accessibility to front panel controls.

Frequently asked questions

• Q: What is the depth range of the AS3-22 shelf?
• A: The shelf adjusts from 19.5 inches to 28 inches in depth, offering a flexible solution for equipment of varying depths and different rack configurations.
• Q: What is the rack height of this shelf?
• A: It is a 3U (three rack units) shelf, designed to fit within standard 19" rack systems while providing stable support for heavier gear.
• Q: Is the shelf compatible with standard 19" racks?
• A: Yes. The AS3-22 is designed for standard 19" rack installations and uses typical front‑rail mounting arrangements found in professional rack environments.
• Q: Does the shelf promote airflow?
• A: Yes. The shelf is vented to help improve air circulation behind mounted equipment and reduce heat buildup in dense rack deployments.
• Q: Is there any model or product line information I should know?
• A: This shelf is part of Middle Atlantic’s AS series and is known for reliable, rack‑mount ready components designed for professional AV, IT, and audio/visual installations. The model identified here is AS3-22, which denotes a 3U, depth‑adjustable rack shelf.