Building Name: Airport Terminal Connector Building

Location: Eastern United State

Building Occupant Name: Department of Aviation

Fuction Types: DOA Offices, Security Checkpoint, Baggage Handling

Size: 250,000 sqft.

Number of Stories: Four Stories

Project Delivery Method: Design Build

Zoning: As an expansion, the zoning is typical for airports (mixed use)

Building Envelope Including Description of Roofing System and All the Various Types of Exterior Wall Systems Used Throughout the Building: The primary envelope is a non-load bearing curtain wall. The curtain wall is primarily glass with metal panel finishes. The first floor consists of a CMU facade disquised with architectural masonry. The roof is Siplast with an SRI of 85%.

Major National Codes: City Code and International Building Code 2006

Building Statistics Two

Construction
                The primary delivery system is Design-Bid-Build with Lump-Sum contracts with allowances that vary for each prime.  Retainage is on a sliding scale of the amount of work that has been completed.  With government projects there is a CM Agency with a General Contractor followed by Multiple Prime Contractors.  Typically low bid is awarded the job; however, with the complexity of the project previous contractors that have worked on the airport before tend to gain a competitive advantage.

Structural System
                The structural system takes advantage of existing steel piles, as well as, concrete grade beams, mat slab, and columns from the connector bridge between terminals that was demolished.  Combinations of both steel and wood piles were used in the subsurface construction of the new building.  The slab on grade is bordered with a non-load bearing CMU wall to later be hidden with architectural stone.  Trusses supported by W14x176 are used on the ground floor to maximize the open space for the complex runs of baggage handling conveyors.  The second and third floor of the building uses columns and 26x30 bays with wind connections internally and moment connections on the exterior of the building.  The fourth floor consists of trusses.  6 ¼” light weight concrete was originally only to be used on the second floor to ease the deflection of the trusses below, but later was adopted throughout the building.

Mechanical
                The heating and cooling for the building is provided by redundant boiler and chiller units located at a satellite thermal plant (50,000 MBTU).  There is a total of seven 7 AHU’s for basic heating and cooling.  The combined capacity of all seven units is 8,836 MBTU and 180,000 CFM.  For office spaces terminal air boxes and radiant heat are used for individual control of temperature.  Data rooms located in the building CRAC units (Computer Room Air Conditioning) are used and independent from the general building HVAC systems.  On the first floor where the Tugs (luggage cars) enter and exit the building nine Air Curtains are used in the winter to ensure indoor temperatures are maintained.  Each Air Curtain has a capacity of 557 MBTU and 13,062 CFM.

Electrical/Lighting
                Again the power is initially provided from two transformers (2,000A – 480Y/277V) located at the satellite plant, from there the power is sent via duct bank to an underground substation.  At the substation power is transferred again to multiple transformers to step the voltage down.  One path takes the power to two transformers that step the voltage down for 1000A – 208Y/120V power.  The second path takes the power to five oil cooled transformers and steps it down and up to 750A – 480Y/277V or 2500 – 480Y/277V.  UPS and ‘Blue Buss’ systems are also included in this redundant system, as never to have to close the facility for electrical malfunctions or power outages. 
                Lighting on the first floor for the baggage handling system is primarily 2x4 linear fluorescents and HID wall washers at the transparoll doors for high visibility where the Tugs enter and exit the Building.  On the second floor there are again 4’ linear fluorescents, as well as, compact fluorescents at the entrance to the wanding stations and neon cove lighting in corridor.  The third floor is composed of offices which use a wide variety of architectural and accent lighting; however, they are primarily fluorescents.  

Fire Protection
                The main system in the building is a wet system.  For data rooms an iodine gas system is the first system with heat detectors followed by a backup wet system if the dry system fails.  The system reports back to the central fire station for the airport.  In the event of a fire, hydrants are located on both the outside perimeter and roof of the building.

Transportation
                There are two holeless hydraulic elevators and three holed hydraulic elevators.  All elevators are rated for a load of two tons and speed of 100 fpm.  There are four escalators that transport customers from the first floor to the main entrance at 90 fpm.  Escalators are required to exceed the national standard (ASME A17.1) by not less the twice the allowable design load.