203_-_Enlarged_IDF_Rooms.pdf

This is an architectural drawing specification document for the County of San Mateo Department of Public Works related to the Cellular Distributed Antenna System (DAS) installation at the North County Wellness Center in South San Francisco, California. The document provides detailed floor plan specifications for enlarged Intermediate Distribution Frame (IDF) rooms across three levels of the facility, defining space allocation and equipment placement for cellular carrier infrastructure. The specifications detail the installation of B-Line 4-post racks (20" x 30" x 84"), cable management systems, access control panels, fire alarm panel space, copper cable punchdown blocks, and dedicated wall space for cellular DAS equipment across Levels 1, 2, and 3. The project encompasses design and procurement services in Phase 1 (due by March 2026) with installation and commissioning in Phase 2 (equipment required on site by July 2026). The Request for Proposals was released February 24, 2026, with proposal submissions due March 9, 2026, at 5:00 pm, and an anticipated contract award date of April 7, 2026. The system must provide 5G-ready, neutral-host DAS coverage for AT&T, Verizon, and T-Mobile/Sprint with minimum 95 percent in-building coverage and signal strength better than -85 dBm downlink and -95 dBm uplink.

The architectural specifications indicate that the General Contractor is responsible for providing 120-volt, 20-amp quad circuits positioned below cable trays at designated locations. The design includes multiple 4-inch underground conduits from existing and new vaults on-site for DAS, fire alarm, and carrier systems. All materials must be manufacturer-certified and new, complying with NEC codes, local building codes, RF exposure regulations, and seismic/structural requirements. The contractor must provide a minimum one-year warranty including proactive monitoring, firmware updates, quarterly performance checks, and annual preventative maintenance. The County of San Mateo has adopted a local business procurement preference ordinance under County Ordinance Code Chapter 2.89, which may provide preferences for qualifying local businesses. The contract includes a $20,000 owner contingency allowance for direct changes and unforeseen conditions requiring written County authorization. Insurance requirements mandate $1,000,000 in comprehensive general liability, motor vehicle liability, and professional liability coverage, with the County named as additional insured. The contractor must comply with California prevailing wage requirements, San Mateo County Living Wage Ordinance, non-discrimination provisions, and HIPAA and Section 504 compliance requirements as applicable.