Middle Atlantic CBS-MRK-36 Caster Base for MRK 36-Inch Deep Racks
Overview
The CBS-MRK-36 is a four-caster steel base designed specifically for Middle Atlantic MRK-series racks with 36-inch depth. At 4 inches tall and rated to 1,300 lbs (589.7 kg), it converts a stationary floor rack into a mobile enclosure — a real advantage during AV or security system commissioning when you need to position, adjust cabling, and then roll the fully loaded rack into its final footprint without lifting. The black wrinkle powder coat finish matches MRK-series rack aesthetics and holds up in active equipment rooms where finish durability matters. The unit ships at 27.8 lbs with a product weight of 25.8 lbs — heavy enough to signal solid steel construction, light enough for a single installer to handle.
Compatibility
The CBS-MRK-36 is built exclusively for the Middle Atlantic MRK rack series at 36-inch depth. It is not a universal caster base — confirm your rack is MRK-series and 36 inches deep before ordering. It will not fit MRK racks of other depths, nor will it interchange with ERK, BGR, or other Middle Atlantic rack enclosure families. If you are working with a different rack depth in the MRK line, Middle Atlantic offers depth-matched CBS variants; cross-referencing the rack's depth spec against the CBS model number is the only reliable compatibility check. The footprint — 20.88 in wide × 33.88 in deep — is sized to the MRK 36 floor plate, so shimming or adapter plates are not required.
Installation Notes
Installation attaches the CBS-MRK-36 to the underside of the MRK rack frame using the rack's existing base mounting points. Casters should be locked before loading equipment into the rack and remain locked any time the rack is stationary to prevent unintended movement under load. With a 1,300 lb capacity, this base can support a fully populated deep rack, but distribute equipment weight evenly across the rack shelves — concentrated bottom-loading near the weight limit stresses the caster mounts. Review your rack accessories and cable management plan before the rack is in final position; repositioning a loaded rack is the whole point of the caster base, but repeated repositioning on uneven concrete floors accelerates caster wear.
