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LOCATION : TEMPE, AZ

PROJECT COMPLETED 2008

ARCHITEKTON STUDIO

MULTI-MODAL TRANSIT HUB + MIXED USE

40,000 SQ. FT. 3-STORY

SEEKING LEED PLATINUM CERT.

l ight rail hubunder-floor air supply

bicycle valet

vegetated green roofon-site solar generation

integrated mixed-use retail

local bus stopssolar shading skin

rainwater harvest

DESI

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S“ The Center has been organized to balance efficiency with the best possible work environ-

ment. Due to the unique positioning and proportions, the building’s service functions occur within an

expressive core that provides a natural buffer on the west elevation. A simple, flexible floor plate is adjacent to the core, which allows

for protected daylight from the south, north and east exposures. This relationship of service and served spaces works on all three levels, cre-ating efficiencies in plumbing, mechanical and circulation. The simplicity of the office configuration is accentuated with an expressive jewel-like form of the community room. Posi-tioned to be seen from Forest and the intersec-tion of Fifth and College, the community room

becomes an iconic symbol for the Tempe community. All glazing on both the office/retail and community room are shaded from direct sunlight. This provides an opportunity to create an architecture that expresses its relationship with our specific environment, which also

functions well with LEED Platinum goals. The project incorporates the first climate-appropriate green roof and grey system in Tempe. Every form, material, relationship has more than one purpose or function. The goal was to create a Transportation

Center that is a wonderful icon for the community, cost efficient and in harmony with environment.

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Primary Structural System:

Steel Frame Columns + Beams @ 24’ o.c. Floor Joists @ 6’ o.c.

Structural Concrete + Steel Composite Deck Floor System

By using high strength, sized steel members, the column grid is pushed to the interior edge of the building envelope allowing for a completely open floor plate, and a fully glazed envelope.

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Structural Loads:

Gravity + Live Loads (Vertical)

Direct gravity loads and live loads from occupants are transferred via beam or joist to the columns carrying them to the ground.

Seismic + Wind Loads (Lateral)

Resisting torsional racking forces caused by seismic or wind loads is a shear wall in which the steel frame system is attached to. A composite concrete steel deck is also used to provide lateral stability.

Gravity Live Loads

WindSeismic

STEEL FRAME SYSTEM

CMU SHEAR WALL

COMPOSITE CONCRETE STEEL DECK

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Primary Foundation System:

Reinforced Concrete Footing 18” x 8”, 9’ depth, steel reinforced

Reinforced Concrete Retaining Wall 16”, 8’ depth, steel reinforced

Given stable soil conditions, and arid temperate climate, the foundation system, is minimal in depth & frost protection. A shallow foundation footing and basement retaining wall are used to accomodate service and equipment basement space.

PHOTO COURTESY, PHXWEBGUY AT FLICKR.COM

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Steel Frame + Glass Curtain Wall:

Connected Physical Integration Typ. bolted steel plate serves as intermediary

Ordered yet Hidden Visual Integration Bolt details are hidden, but both systems have clean and ordered aesthetic

glass curtain wall system

structural steel frame system

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The Core + Support Bar:

Electrical, Plumbing, + HVAC Equipment The 3 major building service spaces are arranged along a support bar on all 3 levels.

Vertical Circulation Stair and Elevator Systems occur away from the Support Bar, placed at the ‘front of house’ for ease of access.

major hvac equipment

restroom plumbing & refuse

vertical circulation

FLOOR PLAN BASE IMAGE COURTESY ARKITEKTON2

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RETWIN CAVITY (CEILING & FLOOR) AIR

DISTRIBUTION SYSTEM VERTICALLY ALIGNED PLUMBING

SERVICES WITHIN ‘CORE’

EXTERNAL VERTICAL CIRCULATION STAIR

INTERNAL VERTICAL CIRCULATION STAIR & ELEVATORS

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FRESH AIR SUPPLY DIFFUSERS

ZONED ELECTRICAL + DATA DISTRIBUTION

RAF CAVITY CONTAINING AIR PLENUM & ELECTRICAL

OPERABLE WINDOWS FOR PASSIVE COOLING & VENTILATION

HVAC AIR HANDLER

CEILING CAVITY WARM AIR RETURN

WARM AIR SUPPLY DUCTS

Ventilation, Electrical, + Data Systems

Integration of structure and interior (finished floor) allow for efficient distribution of air and electrical systems.

DETA

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HAS POTENTIAL TO SELF-SHADE UP TO 71% OF HORIZONTAL SURFACE

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Detailing for Efficiencies

Arkitekton focuses on function in developing design details. Design logic is based around environmental performance and spatial efficiencies. Systems, like the rotated self-shading CMU above, or raised access flooring with integrated air distribution and electric and data wiring, concern themselves with simplicity and reduced energy usage

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Raised Access Floor System

Detailing for this system includes self leveling legs, accomodating for changes in floor height. Expansion joints are also considered for structural and interior floor system movements.

STRUCTURAL FLOOR JOIST

STRUCTURAL EXPANSION JOINT

STEEL DECKING

STRUCTURAL CONCRETE FLOORING

RAF ALUMINUM THRESHOLD PLATE

MODULAR FINISHED FLOOR PANEL

THREADED STEEL STUD

LEVELING NUT

STEEL PEDESTAL TUBE

DETA

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EINTENSIVE NATIVE VEGETATION

SOIL + PLANTING LAYER

FILTER FABRIC (FELT OR OTHER MEDIA)

DRAINAGE LAYER, 1” PEA GRAVEL

FILTER FABRIC (FELT OR OTHER MEDIA)

EXTRUDED POLYSTYRENE INSULATION

ROOT BARRIER MEMBRANE

FULLY ADHERED WATERPROOFING MEMBRANE

STRUCTURAL COMPOSITE DECKING

Green Roof System

A multilayered planting system absorbs most of the rainwater that falls on the roof. A fully adhered waterproofing membrane and flashing prevents leakage, and guides excess water to the piping for cistern collection.

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STRUCTURE - STEEL FRAME

ENCLOSURE - LOW-E GLAZED CURTAIN WALL(FROSTED DOUBLE PANE)

SITE/SERVICES - OPERABLE SHADING DEVICE

ENCLOSURE - LOW-E GLAZED CURTAIN WALL(TRANSPARENT DOUBLE PANE)

Solar Heat Gain + Glare Deterence

Integrating structure, enclosure, and site/services, the architect maximized natural daylighting, while minimizing heat gain and glare.

Operable shading acts as a second skin or barrier for heat and glare reduction, while allowing for connection to the site + landscape.

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NS tempe transportation center, web references:

Architekton Studio @ http://architekton.com

City of Tempe AZ @ www.tempe.gov

Otak Architects @ www.otak.com

World Architecture News @ www.worldarchitecturenews.com

academic & detail references:

AIA. Architectural Graphic Standards. 11th Edition. Wiley. New Jersey, 2007.

Tate Access Floors. Architectural Details, No. 28 Pedestal Conditions PosiLock Access Floor System. @ www.tateaccessfloors.com

building images:

Intro, Design Intentions, Mechanical + Service Systems, Bibliography - Images, Diagrams, + Quote Courtesy of Arkitekton

Structure + Enclosure - Image Courtesy of Phxwebguy at flickr.com

TYLER ASHWORTH

ARCH 568 . TECH. INT.

FALL 2009