203_-_Enlarged_IDF_Rooms.pdf

This is an architectural drawing file for the County of San Mateo Department of Public Works' Cellular Distributed Antenna System (DAS) project at the North County Wellness Center in South San Francisco, California. The document provides enlarged floor plans for the Intermediate Distribution Frame (IDF) rooms on Levels 1, 2, and 3, detailing the physical layout and equipment specifications required for the DAS installation. The drawings specify rack configurations including seven 4-post racks (20" x 30" x 84" B-Line racks) designated for miscellaneous systems, security, IT systems, and third-party carrier equipment, along with infrastructure components such as cable runways, vertical wire managers, door access control panels, fire alarm panel spaces, copper cable punchdown blocks, and wall sleeves for conduit runs. The design incorporates space allocation for cellular DAS equipment, BMS control panels, and dedicated electrical circuits (120v 20 Amp Quad Circuits) positioned below cable trays. Underground conduits—four 4-inch and three 4-inch conduits—connect to existing and new vaults on site to support the distributed antenna system serving AT&T, Verizon, and T-Mobile/Sprint carriers.

The technical specifications outlined in the IDF room plans establish the infrastructure foundation for Phase 1 and Phase 2 project execution, with proposals due March 9, 2026, and contract award anticipated April 7, 2026. The project requires the contractor to design and procure a complete, functional 5G-ready DAS system achieving minimum 95 percent in-building coverage with signal strength specifications of -85 dBm downlink and -95 dBm uplink, utilizing new manufacturer-certified materials compliant with NEC codes and local building requirements. The contractor must provide comprehensive warranty coverage for one year including proactive monitoring and quarterly performance checks. Insurance requirements mandate $1,000,000 each in comprehensive general liability, motor vehicle liability, and professional liability coverage. The contract is subject to California prevailing wage requirements and San Mateo County Living Wage Ordinance compliance, with a $20,000 owner contingency allowance available for authorized changes and unforeseen conditions.