Middle Atlantic RIB-3-WRK-32 Riser BaseMiddle Atlantic RIB 3 WRK 32 Riser Base The Raised Floor Enclosure System from Middle Atlantic is a time saving, practical solution designed to streamline field rough in procedures and cable management in professional AV and IT installations. The RIB 3 WRK 32 Riser Base measures 2 1 2" high, creating a robust, level foundation that lets technicians perform rough in work before racks and enclosures arrive on site. This riser base is also a smart, low