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Fall 2008 Dartmouth Architecture 2/3 group project designing a new school on Governor's Island, NY.

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  1. 1. G overnors I sland R esearch A ssociation F or F ixing the E nvironment G.I.R.A.F.F.E “ Design from the Top Down”
  2. 2. The Harbor School needed space for the following: Boating Boat building Lab Classroom We took these needs and expanded on them, focusing on designing for the New York harbor environment, encouraging habitat and life, and integrating the landscape to the building and the building to the water. Additionally, we wanted our building to be an example for future environmentally conscious buildings that challenge norms. Goals for Building 134
  3. 3. We left some components of the original building. We chose to keep the original building shell on the original site to save money. From the original building, we plan to renovate it, push out the waterside façade, add cantilevered second and third floors, and add a green roof over the entire building. The green roof is the primary feature of our building; it slopes over the esplanade and down to a marshland. Design considerations
  4. 4. The green roof: why it’s important for The Harbor School Green roofs insulate better. Temperature “ Field experiments…found that a 6 inch extensive green roof reduced heat gains by 95% and heat losses by 26% compared to a reference roof.” The Harbor School would save money on heating and cooling costs. Sound “ a 20 cm (7.9 inches) substrate layer can reduce sound by 46-50 decibels.” Noise from the island, city, and harbor would be muted by a green roof. We’re proposing to install a 24 inch intensive green room. Information from
  5. 5. The green roof: why it’s important for The Harbor School A green roof will filter the air moving across it. “ 1 m 2 of grass roof can remove between 0.2 kg of airborne particulates from the air every year” Green roofs create habitat and give back to their environments. Green roofs also create oxygen. “ 1.5 m 2 of uncut grass produces enough oxygen per year to supply 1 human with their yearly oxygen intake requirement” Green roofs are estimated to last twice as long as typical roofs. Green roofs can score more than 7 credits through the LEED certification system. Information from Additionally, buildings with green roofs have the potential to receive grants related to energy efficiency. Extra bonuses
  6. 6. The facts of the green roof Anticipated Graywater Provided (GreenRoof sq.ft.)*(Avg. rainfall sq.ft.)*(%roof retention) Gallons (17836)*(.22789) 30,405 Gallons Avg. Single Family Home (3bed/2bath) water use from: Handbook of Water Use and Conservation , Amy Vickers Our Intensive GreenRoof = 17826 sq.ft. Avg. NYC Central Park Annual Rainfall 1971-2000, with respective summer and winter retention rates, converted into sq.ft. = 0.22789 Provided - Use 2336.5 gal <ul><li>EXTRA WATER generated by the Intensive GreenRoof allows for: </li></ul><ul><li>Water storage for dry months (i.e. February) or emergencies </li></ul><ul><li>Aquatanks </li></ul><ul><li>Lab cultures </li></ul><ul><li>Potential economic gain by selling back to the grid </li></ul>$$$ SAVED: Avg. Water Bill/Year = $699, * 3 to account for our larger footprint = $2,097 Avg. Heating Bill = $928, *.95 for savings due to Greenroof = $881.60 TOTAL SAVED: $2,978.60/yr. 0.22789 In ft.^2 = 32.816 TOTAL COLLECTED 9.524 Collected (*.4) 23.81 Total Winter (Oct,Nov,Dec,Jan,Feb,Mar) 23.292 Collected (*.9) 25.88 Total Summer (Apr,May,Jun,Jul,Aug,Sept) gallons/year 28068.5 TOTAL gallons/day 76.9 4.8 12 39.6 20.5 # more N/A N/A 3.6 4.1 per 1.6 4 10.8 8.2 avg. house other leaks faucets toilets WATER USE
  7. 8. MAST center renderings
  8. 9. MAST center, first floor plan Marine technology lab Garage door for boat access Conference room Indoor river Machine stations Boat building area Administrator’s office Main office Decks Diving gear storage Marine science lab Esplanade Water N
  9. 10. MAST center, second floor plan Esplanade Water Visual arts center Classroom space Outdoor deck Glassed-in porch Deck Lab space Water Atrium Much of this space is flexible and could be used for many functions. N N
  10. 11. Elevations MAST center, third floor plan Green roof Water Much of this space is flexible and could be rented out as conference space. Esplanade Deck Viewing portal Terrace Classroom or conference space Storage Storage N
  11. 12. East elevation West elevation Side elevations
  12. 13. MAST center elevations North elevation Section lines on a building plan for the following sections. Section 1 Section 2
  13. 14. MAST center sections Section 2 Section 1
  14. 15. Site rendering and section
  15. 16. Interior renderings View from esplanade entrance to waterfront entrance; overlooking indoor river Interior view of three story atrium
  16. 17. Development of ideas: interaction with the water Water only accessible via docks Cantilevered third floor, water slightly enters building Cantilevered second and third floors Cantilevered second and third floors, water goes through building 1. 4. 3. 2.
  17. 18. Development of ideas: the green roof Roof only covers building Roof extends over esplanade Roof tumbles over esplanade and into marshland 1. 3./4. 2.
  18. 19. Intensive Greenroof = $25/sq.ft. http:// = com_content&task = view&id =26&Itemid=40 Floating Docks , 4’ wide = $114 per every 4’ in length Building = $265/sq.ft.; construction and maintenance cost included Derived from a projected budget – UBC’s sustainable building MAST center, costs by category $10,884,132 TOTAL: $12,882 $1,710 1 $114 15 60 $4,104 1 $114 36 144 Esplanade $2,736 6 $114 4 16 $3,420 1 $114 30 120 $912 2 $114 4 20 Subtotal # cost/4 ft. multiplier length Docks $445,900 Sum: $25 17836 Subtotal cost/sq.ft. sq. ft. Green Roof $10,425,350 Sum: $3,532,450 $430 8215 Third Floor $3,998,570 $430 9299 Second Floor $2,894,330 $430 6731 First Floor subtotal cost/sq.ft. sq. ft. Building
  19. 20. Phasing for the MAST center <ul><li>Renovate existing building to new floor plans </li></ul><ul><li>Do clean up and make student-safe </li></ul><ul><li>Add docks and build up waterfront </li></ul><ul><li>---------------- </li></ul><ul><li>Cost: $2,902,398 </li></ul><ul><li>Expand waterfront façade with curtain wall </li></ul><ul><li>Cantilever second floor </li></ul><ul><li>------ </li></ul><ul><li>Cost: $3,998,570 </li></ul><ul><li>Add cantilevered third floor </li></ul><ul><li>Add intensive green roof, sloping down to the water and over promenade </li></ul><ul><li>--------------- </li></ul><ul><li>Cost: $3,978,350 </li></ul>We maintained a focus on the students, and sought to get them into the building and on the water as soon as possible. After that, the more expensive design elements can be added to the building. Phase one Phase two Phase three
  20. 21. Phasing for the MAST center Phasing pics 1. 3. 2. Phase one Phase two Phase three
  21. 22. Model within site plan
  22. 23. Physical Model
  23. 27. G.I.R.A.F.F.E, the team