Bridgestone Tower

The Bridgestone Tower is a Design-Bid-Build project that will be completed in mid-late summer of 2017.  The site was a previous parking lot owned by the city, but was sold to Highwoods Properties for development.

The project will be closing off one of the adjacent alleys in order to have more space for material layout and office trailers.  Two tower cranes are being used in order to facilitate the high rise construction. 

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The building will consist of parking in the basement as well as the first 12 floors, excluding the lobby ground floor.  The rest of the higher floors is devoted to office space that will be developed and occupied by Bridgestone Americas’ Corporate office.  The ground floor will include a lobby for the office as well as retail space.

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The building is equipped with 13.8kV service from the utility.  There is also a 1500kW diesel generator located in the lower basement in the case of power failure.  There is one 15kV transformer on levels 1-11.   The first floor is also where the majority of electrical equipment is located. There are 5 transformers on level 12; 2 30kV transformers, 2 2000kV transformers, and one 15kV transformers.  There are 2 75kV transformers on levels 13-31.  The penthouse level, where most mechanical equipment is located, has 2 15kV, 2 45kV, and 2 1500kV transformers.

The feeders consist of both Aluminum and Copper conductors depending on the amperage.  The lower amperage feeders (15-50 amps) will mainly be copper conductors while the higher amperage (60-2,000 amps) will mainly consist of aluminum conductors.

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The lighting system consists mainly of A2 fluorescents.  However, this lighting system, is only for the permit process.  The tenant (Bridgestone) will be required to detail their own lighting fit out once the building is completed and handed over after construction. 

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A chilled water system is being used as the cooling system for the entirety of the building.  Most of the mechanical distribution lies within the CMU core of the building.  The major equipment is mounted on the roof penthouse level.  On the roof is the following:

• 2 chillers for a total capacity of 1200 tons with the capacity to expand to a third chiller

• 3 cooling towers with the capacity to expand to 4 towers

• 2 parallel condenser pumps with the capacity to expand to 3 pumps

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The system also includes several heat exchange economizers in order to reduce the use of energy for cooling.  Air distribution will be through a variable air volume system.  Each VAV box will also contain electrical heating coils for cold winter months.

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The majority of the structure is reinforced concrete. This includes a concrete foundation and concrete slabs for all floors.  The floors above ground are reinforced using post tensioning techniques.  The foundation must be a minimum of 5” deep and the formwork for the columns and slabs is reused every floor.  Most reinforcing bars will be #4, #5, or #6 bars where noted for columns.  The façade system is also tied into the structure where needed.

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There is also a Concrete Masonry Unit (CMU) core throughout all floors of the building that offer sheer wall stability.  This core houses the bathrooms, elevators and mechanical space for each floor.

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The foundation consists of a 5’ thick slab on ground with foundation walls that form the sub-basement.  These walls will be designed to withstand at least 45PCF of active pressure and at least 330PCF of active pressure. The spread footings should be able to bear 200KSF on bearing rock.

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