Fisk ’s new Corporate Headquarters is primarily a structural steel framed facility. Walter P. Moore designed the framing system specifically to combat lateral loads and provide stability under gravity loads by implementing what they call a “Lateral-Force Resisting System” in the office building. This system is comprised of two parts. First, the engineer designed steel braced frames consisting of steel diagonal members, steel columns and connecting steel floor beams. He then completed the design by implementing two structural diaphragms located on the second floor and roof levels that are completely attached to all steel floor beams and roof members respectively. The second floor diaphragm is a composite slab that contains shear studs and rests on a 2” deep, 18 gauge composite metal deck.
Due to its simplicity, the pre-fabrication shop was simply comprised of steel columns and a LH roofing truss system that ties into W18x35 beams spanning between the steel columns.
In order to hoist and install the steel members in both the office building and fabrication shop a 50 ton crawler crane was employed by Tutor Perini. This crawler crane was stationed in the area between the two buildings where there was plenty space for steel laydown and safe crane operation. From there, the crane could easily move from building to building as required and lift the members directly into their final positions.
Fisk’s Corporate Headquarters project’s Mechanical System is comprised of large packaged rooftop units, fan powered terminal units, and exhaust fans. The office building houses two large 55 and 60 ton rooftop units that can both supply up to 16,000 CFMs of air to the offices below. These rooftop units are connected to 37 fan powered terminal units which distribute the air to the offices for which they are responsible. Three exhaust fans are also housed on the office roof and ventilate the bathrooms and janitor’s closets. This segmentation of the distribution system allows greater comfort control of each individual area along with the potential for energy savings when those areas in question are not exposed to direct sunlight. It also eliminates the need for a mechanical room because all the units are either housed on the roof or within the dropped ceiling.
Unfortunately, the fabrication shop does not have the same type of A/C capabilities as the office and is simply comprised of one small 3 ton, 1200 CFM rooftop unit that supplies air to the prefabrication shop offices. The rest of the space is ventilated via fifteen 5600 CFM fans.
In an effort to provide adequate fire protection for the building and its inhabitants, a 100% coverage wet-pipe sprinkler system was specified to be designed by the sprinkler contractor awarded the job. Due to the building size and classification, no other building fire suppression elements are rated by IBC 2006 Table 601.
Drawing on their obvious history in commercial systems, Fisk Electric designed a relatively cheap, yet efficient electrical system for their new Corporate Headquarters. The system requires a demand service of 608.7 kVA. It is supplied via a 480V utility feed that travels through an 800 amp transfer switch directly into the building’s main 800 amp distribution board. This distribution board then splits the supply into two different feeds; one 150 amp feed services the fabrication shop and other miscellaneous equipment, while the other feeds the second 800 amp distribution panel board within the system. It is from this second distribution board that a majority of the facility’s power requirements are supplied. All of the smaller panel boards that are directly supplied via the two distribution boards are rated at 480/277 volts and primarily service the equipment and lighting loads. They also supply power to the 120/208 volt panel boards by passing through step-down transformers located within close proximity of their location.
The Fisk Electric Corporate Headquarters project implemented two different redundancy systems within their electrical system. The first is a 230 kW generator that they are transferring from their previous location to the new project site. This generator ties directly into the main service feed to the building and can be used to energize the necessary loads during an outage. The second redundant feature can be found in the small data center located on the second floor of the office building. Within this data center resides a small UPS system which will provide uninterrupted power to the data center equipment in the event of an outage intermediately while the generator powers up.
The telecommunications system located within the new Fisk Electric Building is typical of any office building of a similar size. The only exception to this is the data center located on the second floor. Due to Fisk’s intimate knowledge of telecommunication systems, they decided that it would be beneficial for them to store and manage all their digital information onsite rather than pay for it to be stored at a remote facility.
There is one elevator as required by code for handicap access to the second floor of the building.