Preparation for Installation of the Instrument Landing System
This design-build project provided preparatory work for the installation of a new Instrument Landing System (ILS). The ILS consists of an antenna system with primary components at two sites (i.e., Glideslope and Localizer) located at opposite ends of the runway. Work at the two sites consisted of removing and disposing of existing antenna equipment and equipment pads; site preparation for new equipment pads; installing underground conduits for power and communications cabling; installing grounding systems; constructing new equipment pads; and paving new access roads. 1,700 LF of underground fiber was installed to facilitate communications between the two sites. 500 LF of power ductbank and three transformers were installed to provide power for equipment at the two sites. Airfield markings, signage and installation of new survey monuments for ILS calibrations were also part of the scope this contract.
Replace HVAC System NHB
Code-required modification and replacement of 8 air handling units (AHUs), 15 fans, 8 variable air volume (VAV) boxes, and 16 pumps on HVAC systems serving patient care areas and the emergency department. Extensive phasing, infection control, and outage coordination was required to maintain hospital operations.
Phase II of a campus-wide conversion from centralized steam to building-specific, natural gas powered heat exchangers for hot water and heat generation. This phase involved decommissioning portions of the legacy high-pressure steam system and installating new, gas powered equipment for B6 and B61 and integration into the campus energy management control system.
Replace Boilers 1 & 2 at Steam Plant
Design-Build Replace Boilers 1 and 2 at the Steam Plant, B384 included the design of a new steam system, demolition and removal of two of three 45,000 pounds per hour (pph) (1300 boiler horse power (BHP)) water tube boilers in the central heating plant and installation of two new 20,700 pph (600 BHP) fire tube boilers. Steam service was maintained by the third existing boiler while replacement work was completed. Boiler replacement scope involved structural upgrade of the existing raised concrete floor slab, reconnection of all services, including feedwater, vent piping, fuel piping, and instrumentation.
Repair Boiler Feedwater System
Phased replacement of three existing boiler feedwater pumps with 4-stage, horizontal, specialty pumps; provision of one spare pump; installation of 300 LF of new, seismically-restrained and insulated 8"Ø ductile iron pipe main and reconfigured header pipe main manifold; variable frequency drives and controls; and flow meters.
Bldg 13 Energy Upgrades
Replaced a legacy chiller unit with a new 200-ton, oil-free frictionless magnetic bearing air-cooled centrifugal water chiller. Coordinated replacement to support the ongoing operations of the research faclities served by the chiller. Scope included piping reconfiguration, integration into the existing DDC system and sequence of operations, and miscellaneous interior improvements to support the work.
Repair HVAC Periscope Shop
HVAC system upgrade to meet clean room standards. Scope included selective demolition of existing system; installation of new hot/chilled water generating equipment; air distribution ductwork; control systems; equipment support; electrical power and lighting; installation of a new splined panel ceiling and wall repairs; fire protection system revisions; and commissioning.
B2050 Medical/Dental Clinic Renovation
31,750 SF renovation and 3,500 SF addition to a fully operational Medical/Dental clinic. Scope included total HVAC system replacement, repartitioning, interior finishes, and electrical improvements. Concrete and steel addition provided space for administrative offices and medical exam rooms. Extensive phasing and provision of temporary facilities to accommodate ongoing clinic operations.