Knurr 4-Post Open Frame Rack — 42U

Knurr 4-Post Open Frame Rack — 42U

The Knurr 4-Post Open Frame Rack — 42U, manufactured by Extron, delivers maximum accessibility and cable management flexibility for networking, patch panel, and switch installations where enclosed cabinetry is not required. Engineered for structured-cabling MDF rooms, open data halls, and network equipment rooms, this rack provides the open-access convenience of a 4-post design with the structural integrity expected from the Knurr product line.

Adjustable-Depth Rail System

Four vertical extruded-aluminum posts support adjustable-depth front and rear 19" mounting rails spanning 600 to 1,000 mm of usable internal depth, accommodating both shallow 1U patch panels and deep 4U appliances in the same rack without compromise. All 19" mounting positions comply with IEC 60297-2 and EIA-310-D spacing standards.

Studio shot: Knurr 42U 4-post open frame rack showing open sides, adjustable rails, and leveling feet.

High Load Capacity

Rated for a static load of 5,000 N (≈ 510 kg), this rack handles fully populated patch panel and switching deployments with ease. Adjustable leveling feet provide stability on uneven raised floors, and the RAL 7021 dark-grey powder-coat finish on all steel crossbar members ensures long-term durability in demanding environments.

Ready to Deploy

The rack ships complete with M6 cage nuts, adjustable leveling feet, and all hardware required for immediate installation. The open-frame design allows unrestricted cable routing from any direction — top, bottom, front, rear, or sides — dramatically simplifying structured-cabling installations.

In-use installation: Knurr 42U 4-post rack densely populated with patch panels and network switches in a structured-cabling MDF room with cable ladder overhead.

Detail shot: Adjustable-depth rail slide mechanism, M6 cage nut, and U-number laser-etched markings on the aluminum post.

Specifications