512-004_-_HVAC Makeup Air Modifications.pdf

This is a technical drawing set for HVAC makeup air modifications to the NOAA Ship Thomas Jefferson. The document consists of multiple detailed architectural and engineering plans, sections, elevations, and detail drawings that specify the removal and installation of heating, ventilation, and air conditioning (HVAC) systems throughout the vessel.

The drawing set includes comprehensive specifications for HVAC modifications across multiple deck levels, with detailed plans showing ductwork removal and installation, damper and spool replacement, fan room reconfiguration, and related support structure modifications. Key components detailed include the removal of existing HVAC ductwork, fittings, and dampers, along with installation of new equipment such as supply fans, cooling coils, electronic dampers, registers, and associated ductwork. The materials specified are primarily galvanized steel, stainless steel, and various commercial-grade components suitable for marine applications. General notes establish that all work must comply with ASME Y14.35 abbreviations, ABS marine vessel rules, and specifications requiring hot-dipped galvanized or equivalent finishes for corrosion prevention. The drawings reference multiple sheets and plans organized by deck level and functional area, with cross-references to supplementary installation details and electrical modification sheets. Scale notations, dimension references, and coordinate systems are provided to ensure accurate construction and installation throughout the vessel modification project.