Owego, NY City Hall and Community Center

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greenhous(e)scape PROF. DANA CUPKOVA / JOSH CARRELO-MENDEZ EMILY CHANG JAMIE CHOW Three cores support a series of floorplates that house the programtic functions of the Owego City Hall. The space is wrapped by a double layer skin composed of ETFE panels which serves to regulate the environment, creating a sheltered greenhouse space--a lush landscape where the citizens of Owego can escape from the urban context.

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core, ETFE, greenhouse, concrete, landscape, enclosure, escape, environment, bubble

Interior View: Roof of the Daycare looking towards river through Southern facade.

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SECTION NORTH TO SOUTH 10

5

1

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SECTION WEST TO EAST 10

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1

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SITE PLAN The location for the Owego City Hall is located in an empty gap in a row of existing rowhomes.

It is bounded on the north side by the commercial Front Street and on the south side by the Owego River Walk and the Susquehanna River.

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PLAN 10

5

1

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PLAN 10

5

1

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PLAN 10

5

1

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FRONT AND BACK ELEVATION The design for the Owego City Hall presents a stark difference from the context of it’s neighboring buildings.

It aims to offer an escape from the urban context of the town and to serve as a link between the citizens of Owego and nature. The landscape serves as the connection to the riverwalk behind Front Street.

The facades of the buildings are made of the ETFE panels, adding a seemingly soft appearance. Their transperancy is limited, yet allow the passerby to observe elements of the greenery inside.

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PUBLIC GOV. & LEISURE

PUBLIC RESOURCES

PUBLIC SERVICES Public ServicesCoreP

G Daycare Reception +.75 Daycare w/Family Rest room +1.75 OutdoorPlayArea &Garden

120 sf 905 sf 915 sf

ublic ResourcesCore

G Reception Informa tion &ftGiShop room +1 Class ve +2 Community Resources &Archi R OutdoorTerrace &ReadingArea

120 sf 180 sf 1020 sf 1890 sf 980 sf

Public Government &Leisu re Core G +2 +3 +4 R

Reception Pool

120 sf 700 sf

M eeting Room OutdoorM eeting Room

1200 sf 2100 sf

DEVELOPING THE LANDSCAPE

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CIRCULATION 56'0"AFF

14’10” 12’10” 48'2"AFF

51’11"AFF

44”

44” 5’6”

35'11"AFF 36’9"AFF

7’8”

34”

22'6"AFF

22’9.5”AFF

10'3"AFF

11”

7” 0’4.5”"AFF

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FIRE STAIR

CIRCULATION Three cores serve for egress. One main stair around the central core serves ar regular circulation with ramps connecting the plates on the different cores.

The meeting hall and the daycare also have regular circulation stairs.

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WALL SECTION Operable ETFE membrane panel

AND ENVIRONMENTAL SYSTEMS The skin acts as a thermal varrier that regulates heat and ventilation. The inner skin can be selectively varied such that some ETFE panels are more translucent than others, thus controlling the amount of radiation that is allowed into the building. These panels are chosen based on sun angles in the summer or winter and where parts of the building require more heating than others.

Steel space frame ETFE Panel membrane Flourescent light Pressurized air pumps

Soil Concrete planter / bench Flourescent light Drainage layer Double layer sealant Concrete floor slab Sprinkler Reinforced concrete beams

1/2" Glazing

In normal conditions, the warm air rises due to greenhouse effect and is sucked out with a fan located on the inner membrane. The warm air escapes through the vent on the top of the skin to prevent overheating in the building. The ETFE panels can also act as operable louvres.

Heater Foam glass insulation Flourescent light Cable trough

In the winter, the vents of the skin are kept closed such that heat is trapped within the cavity. Heat from the warm air in the cavity radiates into the building, and the double skin becomes an insulating layer that maintains a warmer microclimate within the building.

ETFE Panel membrane (Type 1- Translucent) ETFE Panel membrane (Type 2- Clear)

Concrete bench Flourescent light Gutter Tiled flooring

Air vent Skin - Floor plate connection

South Facade Wall Detail

In the summer, the cool air from the riverside enters the double skin cavity through a vent at the South side. As it circulates, it cools the hot air that rises. The hot air is then expelled through a vent at the opposite end of the skin, removing the warm air from the cavity.

High frequency accoustic association fabric Absorbing frit on ETFE foil Reflective low emisitivity fritted ETFE foil Air supply tube Waterproof membrane Insulation Stainless-steel bird wire

HEAT AND DAYLIGHT REJECTED

OUTSIDE

FOIL IN ‘CLOSED’ POSITION

CAVITY

INSIDE

Gravel Concrete

2" Insulation Vapor barrier Drainage layer Drainage pipe Steel bars FOIL IN ‘OPEN’ POSITION HEAT AND DAYLIGHT ADMITTED

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Double ETFE Membrane Detail

North Facade Wall Detail

Interior View: Stairs leading to SKIN TRANSLUCENCY daycare rooftop.

SUMMER

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CAVITY VENTILATION

65 - 70

25 - 30

65 - 70

VENTED CAVITY: SUMMER

VENTED CAVITY: WINTER

65 - 70

VENTED CAVITY: TYPICAL OPERATION

VENTED CAVITY: TYPICAL OPERATION

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VENTED CAVITY: SUMMER

VENTED CAVITY: SUMMER

STRUCTURE Concrete core- 1’ wall thickness

The building is made up of a series of floorplates cantilevered from three concrete cores. The floorplates, also concrete, are supported by reiforced concrete beams that attach to the cores.

The ETFE panels that form the skin of the building are supported on a spaceframe developed from a diagrid pattern. The spaceframe is light enough to be self supporting with the aid of two loading walls adjacent to the side buildings of the site.

Concrete beams- 2’ average depth, 8” thickness

60'11"AFF

56'0"AFF

51'11"AFF

48'2"AFF

36'9"AFF

35'11"AFF

30'7.5"AFF

22'6"AFF

22'9.5"AFF

COLD

HOT

HEATER WASTE WATER OUTPUT

10'3"AFF

WATER INPUT

HEATING SYSTEM / RADIANT HEAT

9'4.5"AFF

8'2"AFF

0'0"AFF

6'11.5"BFF

12'3"BFF 15'6.125"BFF

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THE MODELS: DEVELOPMENT PHASE Models were used to explore the possibilites that could arise out of the concept of elevating the building off of the ground, allowing the flow to the riverwalk.

Skin Development

Several iterations of models were made in the process of determining the shapes of the floor plates and, later on, the ETFE skin.

The models were also used to determine and test the feasability of the structure of the builidng, consisiting of three concrete cores and concrete beams cantelivering from these.

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FINAL MODEL

The final model of the project was built with basswood for the floorplates, lumber for the cores and landscape, and stereo-lythography for the space frame that supports the ETFE panels.

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