NEIU El Centro

Public spaces were designed for 100 psf, corridors for 80 psf, and classrooms for 40 psf. The building has no basement and the foundation consists of concrete footings and grade beams.  The building is framed with ASTM A992 Grade 50 steel.  The first floor is a slab on grade with 6 x 6 - W2.1 x W2.1 WWF.  The slabs on floors two and three consists of 20 gauge galvanized composite steel deck installed for a minimum 3 span continuous system with 4 ½” concrete topping.  Most of the steel framing on floors two and three consists of W18x60 joists and W21x73 girders. The roof consists of 1 1/2” 20 gage metal deck that supports the photovoltaic array.  The lateral force resisting system of El Centro is a moment frame.

Two identical roof top air handling units located on the roof called RTU-1 & RTU-2 handle all of the ventilation and cooling requirements of El Centro.  They are both served by separate air cooled condensing units, also located on the roof.  RTU-1 serves all of the first floor and half of the 2nd floor.  RTU-2 serves half of the 2nd floor and all of the third floor.  The roof top air handling units serve the 71 variable air volume boxes. The buildings heating loads are served by two identical 750 MBH natural gas fired water boilers.  The boiler serves hot water radiant finned tubes that run the length of the perimeter of the building.  The VAV boxes also have reheat coils that are served by the two boilers.  A separate natural gas fired water heater is used for domestic hot water.

Most of the lighting system consists of energy efficient fluorescent fixtures.  Lighting control shall utilize occupancy sensors to reduce wasted energy and dimming to provide users with multiple light level room options.  Spaces with access to natural daylight use photocells to automatically dim or shut off when set point light levels are achieved.  At night, most lights will be turned off based on a time clock to reduce interior lighting power consumption by up to 80%.

The electrical system originates from a dedicated service room on the first floor (480V/277V, 3 phase, 4 wire).  There is a single service for normal power and another service dedicated to the fire pump.  From the service room equipment, the system will distribute out into branch panels located on each floor.  The various loads (i.e. receptacles, lighting, mechanical, and computer) are separated into different panelboards. 

Construction of El Centro began in May of 2013 and was completed in September of 2014.  It was delivered using the design-bid-build method and cost about 15 million dollars.  It was also a Multiple Prime Contractor project.  One of the Prime Contractors acted as the Coordinating Contractor between trades.       

The fire alarm system is a standard Class 1 system consisting of detection and notification devices including ADA required strobes.  The fire protection system is a standard wet-pipe sprinkler system providing coverage to all areas except the electrical and elevator rooms.  The fire protection pump is housed in a dedicated room adjacent to the first floor mechanical room.  Building overhangs have sprinklers and the corridor curtain wall has window washing type sprinkler heads on either side of the glass to maintain corridor fire rating.