CONSTRUCTION _DWGS.pdf

This file is a construction drawing document supporting the Smithsonian Institution's solicitation for installation of emergency generators at the National Museum of American History (NMAH) located at 1300 Constitution Avenue NW, Washington, D.C. 20560.

The project involves replacing an aging 300 kW diesel-fueled generator with two new 500 kW natural gas-fueled generators to be installed on the museum's roof adjacent to the existing generator location. Key scope elements include: furnishing and installing the two generators with integral paralleling gear on a new rooftop structural steel platform; converting existing collections storage space (Room 4606) into a new Emergency Electrical Room to house a new switchboard, automatic transfer switches (ATS), transformers, and panelboards; decommissioning and removing the existing diesel generator from the lower level; routing a new natural gas line through the building; and performing all necessary structural, mechanical, electrical, plumbing, security, hazardous material abatement, and architectural modifications to ensure full functionality and integration with existing systems. The construction budget exceeds $10 million. Applicable NAICS codes are 236220 (Commercial and Institutional Building Construction, $45.0 million size standard) and 238210 (Electrical Contractors and Other Wiring Installation Contractors, $19.0 million size standard). The project must be executed while NMAH remains fully operational and open to the public throughout construction, requiring careful coordination with existing building systems and pathways.