Fort Loudoun Lock HVAC Rehabilitation of Operations Building

SCOPE OF WORK (SUBJECT TO CHANGE): The Corps of Engineers has need of a single fixed price construction contract for rehabilitation of the HVAC system in the Operations Building at Fort Loudoun Lock. The operations building at Fort Loudoun houses an existing system that does not provide adequate cooling, ventilation, or exhaust. The lack of air being exhausted contributes to the rise in temperature for the building along with the absence of a cooling system. There is a lack of fresh air coming into the structure as well, which violates ASHRAE 62.1 standards. The work will include the removal of existing exhaust fan systems, ductwork, and other miscellaneous items, and the installation of one (1) new 5-ton packaged heat pump that will service the downstream side of the operations building, and one(1) 6-ton packaged heat pump that will service the upstream side of the operations buildings. The new system will require new, properly sized, ductwork for supply, return, and exhaust which is also included in the scope of work, as will new inline exhaust fans, ventilator systems and other ancillary items such as louvers, and thermostat/control units to provide a more balance system. Exhaust fans will also be placed in each bathroom that will turn on when the lights turn on for personal relief. The supply and return ductwork will be routed from the Roof Top Units (RTUs) to the designated rooms to condition. Since we will not be using the upstream louver as a fresh air intake, the contractor will cover the upstream louver without altering the external look of the building. Portions of the existing ductwork that will remain and be used alongside the new system will be so indicated on the contract drawings. Package units and outside ductwork shall be placed in such a way that it maintains the historical appearance of the building. Furthermore, all external ductwork and RTUs will be secured to the building using non roof penetrating methods such as support framework. The government will show in the drawings a specs what is expected but the contractor will be free to submit and choose the system they feel is best suited. For a fall protection system, the contractor will install/construct a horizontal lifeline (HLL) that meets all EM 385-1-1 and OSHA requirements. This HLL will be used by the contractor while installing the packaged unit and ductwork on the upstream roof, and it will be left in place for the future use by the government. Contractor shall also construct a ladder on the upstream landside wall of the building which meets or exceeds EM 385-1-1, ANSI/American Ladder Institute (ALI) A14 series, and OSHA requirements. The ladder shall remain for future use by the Government. The new system will be tested with the Duct Air Leakage Test method (DALT) and the Testing and Balancing Procedures (TAB) as per the specifications. The contractor will perform all electrical, mechanical, and structural, investigation, design, mitigation, and construction to complete the work. The existing wall heaters inside the building will be left in place as will the mini-split systems that are outside the building. These units will remain in place, and they will be removed by the project personnel after the new system has been installed.

Division 23 -

Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution, Central HVAC Equipment.