Building Statistics II


Note: While great efforts have been taken to provide accurate and complete information on the pages of CPEP, please be aware that the information contained herewith is considered a work in progress for this thesis project. Modifications and changes related to the original building designs and construction methodologies for this senior thesis project are solely the interpretation of Jonathan Fisher.  Changes and discrepancies in no way imply that the original design contained errors or was flawed. Differing assumptions, code references, requirements, and methodologies have been incorporated into this thesis project; therefore, investigation results may vary from the original design.

Structure: Structural steel frame is braced using L3X3X5/16 in a cross braced formation.  The bracing is attached using typical wind moment connections.  The 4 1/2" thick concrete that makes up each floor is reinforced using 4" high 3/4" dia. Steel shear studs that are welded to the wide flange joists supporting the floor.  The structural steel members that support the floors of the building are a mixture of W21X44’s and W24X55’s.  The wide flanges running long ways in the building are W24X62’s so they are slightly more hefty beams to help support all the weight of the building.  Building 4 is separated into 3 main bays.  The bays on the outside of the building are 48 feet wide while the central bay is only 30 feet wide.  Being that the central bay is thinner than the outsides the beams are only W18X35’s.  The building columns are W14X109 wide flanges and are 24’ apart long ways (east-west) and 48’ max in the shorter direction (north south) of the building.  Cast in place concrete will be used for the slabs on grade and the separate floors in the building.  4000 psi concrete will be used for the slab on grade and the slabs on deck.  2000 psi concrete will be used for in the event that over excavation fill is required.  All other types of concrete on the project will be 3000 psi.

Mechanical Systems: There are 2 mechanical rooms on each floor of the building.  These rooms are directly across the corridor from the stairwell on both sides of the building.  The mechanical systems in the building include; 2 roof top air handlers, 2 rooftop evaporative cooling units, and a standpipe sprinkler system among many other systems.  On every floor of the building there are several fire extinguisher hubs where personal fire suppression systems can be found.

Electrical System: Westinghouse Building 4 is fed by the utility company by a 1500 KVA transformer outside the building.  The main switchgear of the building is a 3200A, 480/277V, 3PH, 4W, 65KAIC symmetrical system.  The electrical rooms on each floor are fed 500A a piece through 2 sets of 4-500kcmil and 1 #1/0 GND all in 3” conduit.  Once in the electrical room the electricity is distributed to the lighting panel board, general purpose and café panel board, and two electrical equipment panel board.  In the event of a power outage the building can be fed by a diesel generator outside the building.  The generator can only deliver 600A to the building so only emergency and essential systems can be run on backup power.  Being that Building 4 is an office building it will contain a vast amount of low voltage wiring.  Every cubicle in the building will be equipped with its own Ethernet wire, phone wire, and regular 220V power supply.

Masonry: The exterior façade of Westinghouse Building 4 contains three separate layers of 4” polished masonry brick.  The total square footage of masonry brick is approximately 19,440 SQFT appearing in 3 separate layers going up the building.

LEED Certification: The main LEED certification attempt with this building is in its large windows on each floor.  These large windows are accompanied by light sensors on each floor, which automatically dim the lights during the day and save electricity.  All areas of the building are also equipped with motion sensors to the lights are off while the building is unoccupied.

Delivery Method: The Westinghouse Building 4 project is being delivered using a Design-Bid-Build delivery method.  Turner Construction won the bid for this building and is carrying it out using lump sum contracts for the design team and guaranteed max price for all of their subcontractors.  LLI/IKM is a joint venture architecture and engineering company and designed Westinghouse Building 4.  The traditional design-bid-build delivery method allows The Ferchill Group to have limited involvement in the project.  This is important to them because they are based out of Chicago, IL.  Subcontractors are local and were chosen on a lowest bid basis.  Many of the subcontractors used for Building 4 also worked on Westinghouse Buildings 1, 2 and 3.  The Ferchill Group owns all insurance policies for the project.  The project guaranteed max price is based on a subcontractor breakdown of all of the system costs.  Turner retains the ability to withhold 10% of all subcontractor contracts until 50% of the total project price has been completed.  Subcontractors that complete their work early con apply for an early release of their retention should they so desire.

Transportation: There is one elevator bank in the center of the building containing 2 separate elevators.  There is also a service elevator in the center of the building that is larger than the passenger elevators to assist in moving large office furniture and supplies up and down in the building.

Lighting: Standard fluorescent lighting will be used to light the majority of the building.  Small accent lights are used around the outside of the building along with parking lot lighting.  The interior lighting is controlled by motion sensors in each room.  When the rooms go unoccupied for 15 minutes the lights automatically turn off to conserve power.