Middle Atlantic CBS-MRK-31 Skirted Caster Base for MRK Series Racks
Overview
The CBS-MRK-31 is a skirted wheelbase designed to mobilize Middle Atlantic Middle Atlantic MRK series rack enclosures with a 31-inch depth. It adds four inches of height beneath the rack cabinet, integrating casters so the entire assembly rolls freely — essential for AV equipment rooms, broadcast racks, and security head-end closets where repositioning without a full tear-down is a real operational requirement. At a 1,300 lb (589.7 kg) weight capacity, it handles fully populated rack systems without flex or instability. The black wrinkle powder coat finish matches standard MRK cabinet aesthetics. Model CBS-MRK-31 ships at 25.2 lbs including the base hardware.
Compatibility
Designed exclusively for the Middle Atlantic MRK series rack enclosures with a 31-inch cabinet depth. The base footprint measures 20.88 in (W) × 29.25 in (D) — confirm your MRK cabinet's external width and depth match before ordering. This is a depth-specific SKU; Middle Atlantic offers equivalent CBS-MRK bases in other depth configurations for shallower or deeper MRK cabinets. Do not use with non-MRK Middle Atlantic lines (ERK, BGR, etc.) or third-party enclosures — the bolt pattern and skirt profile are MRK-specific.
Installation Notes
The base mounts beneath the rack cabinet and raises the assembly 4 in (10.2 cm) — account for this height gain when planning clearance below fixed cable managers or ceiling-mounted infrastructure. Product weight is 23.2 lbs (10.5 kg); plan for two-person installation when attaching under a loaded cabinet. Casters are included as part of the CBS-MRK-31 assembly. Finish is black wrinkle powder coat — clean with a dry or lightly damp cloth; avoid abrasive cleaners that strip the powder coat surface. Review Middle Atlantic's rack accessories line for leveling feet if fixed positioning is preferred over a mobile configuration.
