1737010dwg6of8VOL2.pdf

This document is a comprehensive set of design drawings for the P-171 Weapons Magazines project at Naval Weapons Station Yorktown, Virginia. The drawings are organized into structural, electrical, and telecommunications design specifications and include detailed plans, elevations, sections, and construction details for five magazine structures (Magazines 1-5) that will be constructed using a Design-Bid-Build delivery method under Navy solicitation N4008526R0020.

The structural design encompasses reinforced concrete construction with cast-in-place concrete foundations, walls, and roof systems; blast-resistant door mechanisms with internal locking devices (ILD); bridge crane systems; security pilasters; drainage systems; and ventilation components. Electrical systems include 208Y/120V three-phase power distribution through multiple panelboards (MDP-M, DP1, DP2) fed from a 13.2kV pad-mounted transformer; comprehensive lightning protection and grounding systems with secondary ground rings, air terminals, and guard rails; ordnance and static ground bus bars for safety; LED lighting fixtures with occupancy sensors; and blast door control systems with manual override capability. Telecommunications infrastructure consists of intrusion detection systems (IDS) with motion detectors and door contacts, security monitoring through closed-circuit television roughins, fiber optic connectivity to base infrastructure, and voice communication outlets. The design reflects NAVSEA OP-5 ammunition safety requirements, NFPA 780 lightning protection standards, and incorporates site-adaptation provisions for local conditions at Yorktown. All conduit runs are specified as rigid galvanized steel with minimum 50-foot separation from buildings for utility connections, and electrical equipment is rated for wet/corrosion environments per UFC standards.