Modular Expansion Frames
A frame with no doors or panels that bolts to its neighbours: side, back and front baying strips let a row grow one rack at a time. Same posts and rails as the open-frame rack, drilled for baying.

3D illustration of the reference design
21-Inch, 48 OU Frame, Busbar-Ready (OCP ORv3-Style)
A 21-inch open rack: a frame with a 537 mm clear opening, a 48 mm unit pitch and a central busbar space at the rear where power shelves plug in, instead of PDUs. Hyperscale operators buy them by the thousand.
| Rack | 48OU open four-post, 600 W × 1,100 D × 2,410 H mm, 2,304.0 mm usable rail |
|---|---|
| Standard | OCP Open Rack v3-style (take the exact dimensions from the current OCP drawing): 1OU 48 mm, opening 537 mm (hole pattern from the current drawing) |
| Material | CRCA cold-rolled sheet; posts 3, panels 1.2 mm |
| Design static load (confirmed per order) | 1,400 kg |
| Doors and panels | Open frame: no doors or panels |
| Finish | Powder coat RAL 9005 black texture, 60-80 µm; zinc-plated hardware |
| Product code | 3.18 |
Part of the range: Server racks and network cabinets
A frame with no doors or panels that bolts to its neighbours: side, back and front baying strips let a row grow one rack at a time. Same posts and rails as the open-frame rack, drilled for baying.
The open-frame version of the server rack: four 2 mm posts, top and bottom frames, and four EIA-310 rails on slotted brackets so the mounting depth can be set from about 500 to 750 mm.
45U, Floor-Anchored with Cable Runway and Top Brace (Exchange Grade)
Two 3 mm C-uprights on floor feet and a top tie bar; equipment bolts to the front flange (centre-mount or flush-mount).
Send a drawing, a sample or a description. We make it to your specification and reply with a clear quotation.