203_-_Enlarged_IDF_Rooms.pdf

This is an architectural plan document prepared for the County of San Mateo Department of Public Works regarding the Cellular Distributed Antenna System (DAS) installation at the North County Wellness Center in South San Francisco, California. The plan depicts enlarged floor layouts for Levels 1, 2, and 3 of the facility, detailing the configuration of Information Distribution Frame (IDF) rooms designed to house cellular carrier equipment and infrastructure. The document specifies technical requirements including seven equipment racks allocated across the facility—Racks 1 and 2 for miscellaneous systems, Rack 3 for security, Racks 4 and 5 for IT systems, and Racks 6 and 7 for third-party carriers—along with associated cable management systems, conduit runs, wall sleeves, grounding busbars, and electrical panels. The plan indicates wall space allocation for cellular DAS equipment, door access control panels with conduit connections, fire alarm panel spaces, and provisions for both new and existing underground conduits from on-site vaults. Standard equipment specifications include 20" x 30" x 84" B-LINE 4-post racks, 18" wide cable runways with powder coat finish, vertical wire managers with combination cabling systems, copper cable punchdown blocks, and DAS routing panels, with mounting plates and ground busbars specified as typical throughout the installation.

The technical specifications outlined in the plan establish the physical infrastructure requirements necessary to support the neutral-host, 5G-ready DAS system that will provide coverage for AT&T, Verizon, and T-Mobile/Sprint across all interior spaces of the facility. The plan includes provisions for 120-volt, 20-ampere dedicated quad circuits to be installed below cable trays by the General Contractor, along with Building Management System (BMS) control panels at multiple levels, indicating the integrated nature of the DAS installation within the broader facility infrastructure. All materials and equipment specifications reflect manufacturer standards and compatibility requirements for the specified cellular carriers, supporting the project's goal of achieving minimum 95 percent in-building coverage with signal strength specifications of better than -85 dBm downlink and uplink greater than -95 dBm, while maintaining compliance with National Electrical Code standards and local building code requirements.