Middle Atlantic BGR-Z4 Seismic Brackets for BGR Rack Series

Overview

The BGR-Z4 are seismic brackets designed specifically for Middle Atlantic's Middle Atlantic BGR-series open-frame racks. If your installation is in a seismic zone — or a facility where rack-tip compliance is required by code — these brackets anchor the BGR rack base to the floor, preventing lateral movement and rack topover during a seismic event. The BGR-Z4 spans 23 inches in width, matching the standard BGR rack footprint, and ships at 2.4 lbs, making them straightforward to transport and stage on site.

Compatibility

These brackets are engineered for the BGR series open-frame racks from Middle Atlantic. The Base Series designation is BGR — verify your rack model carries this series designation before ordering. They are not listed as compatible with WR, ERK, or other Middle Atlantic rack families. If you are specifying a rack enclosure build for a broadcast, AV, or security head-end room that requires seismic compliance, confirm the BGR series is your rack platform first.

Installation Notes

At 23 inches wide, the BGR-Z4 matches the standard BGR rack base width — no cutting or field modification required for a standard install. Mounting to the floor will require appropriate anchoring hardware for your floor type (concrete, raised floor tile, or steel deck); floor anchors are not confirmed as included, so have the correct fasteners on hand before installation. Consult your local seismic code for required anchor torque and bracket placement — the BGR-Z4 provides the bracket interface, but torque specifications and anchor pattern must meet your jurisdiction's requirements. For rack planning and accessory selection, verify floor-plan clearances before committing to bracket orientation.