Middle Atlantic CBS-ERK-25 Skirted Caster Base for ERK Series Racks
Overview
The CBS-ERK-25 is a four-caster mobility base designed specifically for Middle Atlantic ERK series open-frame racks. At 4 inches tall with a 22 × 25-inch footprint, it adds floor mobility without meaningfully changing the rack's overall height profile — relevant in machine rooms and AV equipment closets where vertical clearance is fixed. The 1,300 lb weight capacity means even a fully loaded, high-density ERK rack stays well within margin; you're not engineering around the base. The black wrinkle powder coat finish matches ERK rack aesthetics and holds up to the scuffs and contact that come with rolling equipment through doorways and staging areas. If you're working with rack accessories and need to reposition gear periodically without a full dolly operation, the CBS-ERK-25 is the straightforward solution.
Compatibility
The CBS-ERK-25 is sized and designed for Middle Atlantic ERK series open-frame racks with a 25-inch depth footprint. The 22-inch width aligns with the ERK series rail geometry. It is not interchangeable with WRK, WMRK, or enclosed-cabinet bases — those series use different footprint dimensions and mounting interfaces. Verify your ERK rack's depth designation (25 in) before ordering; Middle Atlantic offers caster bases in multiple depths for the ERK line, and selecting the wrong depth leaves the base unsupported or overhanging. This base is part of the rack mounting solutions category and pairs naturally with any ERK rack build where repositioning during installation or maintenance is required.
Installation Notes
The CBS-ERK-25 ships with four casters pre-attached to the base frame — no separate caster installation required. Attach the base to the ERK rack bottom rail using the rack's existing hardware mounting points before populating the rack with equipment; adding the base to a loaded rack requires two people and creates tip risk. At 17.2 lbs product weight the base itself is manageable solo during staging. Confirm your floor surface is rated for caster use — textured concrete and raised-floor panels have different load distribution characteristics at 1,300 lb maximum.
