Middle Atlantic R4-series Four Post Open Rack FrameIntroducing the Middle Atlantic R4 series Four Post Open Rack Frame, a highreliability solution engineered for demanding AV and IT environments. This open rack frame is built to maximize space, streamline equipment configuration, and sustain dependable performance under heavy load. With a generous 45U rack height, a standard 19" rack width, and a deep 36" footprint, it offers ample room for current gear and future expansion while maintaining easy