Panduit R4P23 45RU 4-Post Open Rack

The Panduit R4P23 delivers 45U of EIA-310-E compliant vertical mounting space in a welded steel 4-post frame engineered for high-density server, network, and UPS deployments where cabinet enclosure isn't required. At 23 inches deep with #12-24 threaded equipment rails, this rack accommodates mid-depth switches, patch panels, and PDUs while maintaining tool-free equipment installation via threaded cage nuts. UL 2416 listed for 2,500-pound static load capacity, the R4P23 provides the structural rigidity of a cabinet with the airflow and serviceability of an open frame—critical for integrators staging pre-wired infrastructure racks or deploying in temperature-controlled data centers where front/rear access trumps dust protection.

Key Features

• 45 rack units (78.75 in) of vertical EIA-310-E mount space on 19-inch center rails
• #12-24 threaded equipment rails with printed RU numbering for repeatable mounting without measuring
• Adjustable front-to-rear rail depth accommodates 18–23 inch equipment without modification
• UL 2416 certified 2,500 lb static load capacity—handles fully loaded blade chassis and battery strings
• 23.25-inch overall width fits standard 24-inch tile data center layouts with side-access clearance
• Welded steel construction with black powder-coat finish resists corrosion in HVAC-controlled environments
• Compatible with Panduit's full line of vertical cable managers, horizontal troughs, and equipment shelves

The #12-24 threaded rail system is the defining advantage for integrators pre-staging racks off-site. Unlike square-hole racks requiring clip nuts or tool-based insertion, the R4P23's tapped holes accept 12-24 screws directly—you mount equipment with a screwdriver, no cage nut wrestling or flashlight-in-mouth rail peering. Each equipment rail carries printed rack unit numbers on both sides, eliminating tape measures and enabling junior techs to hit mounting specs from a one-line diagram. The rails adjust on 1-inch increments across a 5-inch range (18" minimum to 23" maximum), so you can flush-mount shallow 20" patch panels at the front posts while deep 23" servers span the full frame. Panduit's rail design maintains EIA-310-E hole spacing across the entire 45U height, ensuring compatibility with any 19-inch rack-mount gear regardless of manufacturer. The 2,500-pound UL listing isn't just a number—it's tested static load with safety factor, meaning you can stack four 42U racks worth of equipment (typical 1,200–1,500 lb actual load) and remain well within structural limits even under seismic or transport vibration.

Open-frame 4-post racks solve specific deployment scenarios where full cabinets add cost without benefit: pre-wired telecom closets with card-access restrictions where dust isn't a concern; raised-floor data centers with hot-aisle containment where the rack sits inside a segregated airflow zone; staging areas where integrators build and burn-in complete infrastructure stacks before final delivery. The 23-inch depth is purposeful—deep enough for most enterprise switches (typically 16–20 inches), UPS units, and 2-post conversion brackets, but shallow enough to fit tight IT closets where 36-inch cabinets won't clear the door swing. The 23.25-inch outer width provides knuckle clearance for side-access cable dressing while still aligning to 24-inch data center floor tiles. Panduit's accessory ecosystem transforms the R4P23 from bare frame to managed infrastructure: vertical cable managers mount to the outer posts and create 6-inch side channels for service loops and slack storage; horizontal 1U and 2U troughs snap into the equipment rails for patch-cord breakout at every switch layer; cantilever shelves support non-rackmount KVMs or protocol converters. Because the frame is welded steel—not bolted extrusion—there's no flex or twist when you torque down heavy equipment or pull cable bundles through managers.

The R4P23 meets EIA/ECA-310-E dimensional specs, UL 2416 structural certification, and RoHS material compliance, making it suitable for federal/state IT procurements and LEED-certified construction projects. The #12-24 thread standard ensures you're not hunting for proprietary hardware—any integrator truck stock or Home Depot carries 12-24 screws if you run short mid-install. For integrators deploying redundant infrastructure (dual switches, dual UPS, dual everything), the 2,500 lb rating and printed RU numbering let you build symmetrical hot-site racks where left and right equipment mounts at identical heights without guesswork. This is the rack you specify when the install requires repeatable, auditable mounting and the budget won't tolerate cabinet lock-in costs.