Middle Atlantic Srb Series Seismic Certified Riser Base 3Bay 26D 24HEngineered for Zone 4 seismicity and Seismic Design Category D environments, the Middle Atlantic SRB Series Seismic Certified Riser Base delivers dependable, organized cable management even in areas with significant seismic activity. This 3 bay riser base, sized with 26D depth and 24H height, preserves the familiar SRB workflow while elevating performance for critical installations. Designed for data centers, broadcast studios, control rooms, and