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Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
Minnesota Twins Target Field & Post Tensioning
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Minnesota Twins Target Field & Post Tensioning

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Presentation by Neel Khosa given during the Post-Tensioning Institute's 2011 Technical Conference. Topic is about the use of unbonded post-tensioned concrete in Target Field stadium, home of the …

Presentation by Neel Khosa given during the Post-Tensioning Institute's 2011 Technical Conference. Topic is about the use of unbonded post-tensioned concrete in Target Field stadium, home of the Minnesota Twins MLB team.

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  • Target Field – Minnesota TwinsPresenter by Neel Khosa, Vice President of AMSYSCO Inc.Presented at the 2011 Post-Tensioning Institute ‘Technical Conference’ for “Post-Tensioning, Design and Construction (part 1)” on May 3, 2011
  • Project Background, Construction Team, Design, Post-Tensioning
  • Coordination, Construction, Sustainability, Stadium Highlights, Grand Opening
  • Box Score is for the Minnesota Twins home opener against Boston Red Sox on April 12, 2010. (V) = BOS, (H) = MN
  • Walter P. Moore (structural engineer), Populous (architect), Mortenson Construction (construction manager), AMSYSCO Inc. (post-tensioning supplier)
  • Post-Tensioning supplier of Target Field was AMSYSCO, Inc. (www.amsyscoinc.com)
  • Quote from “Green ballpark showcases urban sustainability” Atlanta Business Chronicle by Giannina Smith
  • Stress 55 tendons with Main Concourse, 30 tendons with Club Level, 15 tendons with Suite Level, 30 tendons with Terrace Level.
  • Post-Tensioned Concrete Girders formed and poured ahead of time so that construction on upper levels could be expedited.
  • Entrance Promenade
  • Construction Worker Parade
  • Unfurling of U.S. Flag on field
  • National anthem by construction workers and suppliers
  • Stadium map of Main Concourse
  • Credits for information, logos, photos, etc.
  • Minny and Paulie (Minneapolis and St. Paul)
  • Transcript

    • 1. TARGET FIELD
      MINNESOTA TWINS
      Post-Tensioning
      “Design and Construction”
      May 3, 2011
      Neel Khosa, AMSYSCO Inc.
    • 2. 1st Inning : Project Background
      2nd Inning : Construction Team
      3rd Inning : Design
      4th Inning : Post-Tensioning
    • 3. 5th Inning : Coordination
      6th Inning : Construction
      7th Inning : Sustainability
      8th Inning : Stadium Highlights
      9th Inning : Grand Opening
    • 4. Project Background
      Minnesota Twins shared the Metrodome with Minnesota Vikings
      1995 : Early plans to move
      2005 : Deal between MN Twins and local Govt.
      2006 : Minnesota state Govt. approved deal
      2007 : Funding finalized and land acquired
      2007 : Groundbreaking
      Minnesota Twins vs. Boston Red Sox
      Opening Day box score on April 12, 2010
    • 5. Project Background
      Open Air Ballpark
    • 6. Project Background
      Form Follows Function
      Ballpark naming rights to Target Corporation
    • 7. Construction Team
    • 8. Construction Team
      Owner(s)
      Minnesota Ballpark Authority
      Hennepin County
      Architect(s)
      Populous
      HGA
      Structural Engineer
      Walter P. Moore
      Construction Manager
      Mortenson Construction
      Post-Tensioning Supplier
      AMSYSCO Inc.
      Post-Tensioning Installer
      E&J Rebar
    • 9. Design of P.T.
      Flat-plate Post-Tensionedsystem in Mezzanine level.
      Post-Tensioned girdersin Concourses and some seating areas (with conventionally reinforced pan-formed beams and slabs).
    • 10. Design of P.T.
      Post-Tensioning selected due to long-span capabilities and reducing concrete depth.
      Heaviest Girder had 5,805 kips of Final P.T. Force.
      Many girders required stage-stressing.

      “Site limitations and the ballpark layout dictated 28 main grandstand columns to be located directly atop the transit rail lines, so they were transferred with stage-stressed, post-tensioned girders that span up to 45 feet over the corridor to support the ballpark above.”
      - Justin Barton (Walter P Moore)
    • 11.
    • 12.
      EXAMPLE OF STAGE-STRESSING IN BEAM SCHEDULE
    • 13. Post-Tensioning
      SYSTEM
      0.5” Diameter 270 ksi PC Strand.
      Unbonded 50 ML HDPE plastic-sheathing.
      Encapsulated anchorage system for corrosion-protection.
      REQUIREMENTS
      Stressing to 33 kips when concrete reached 3000 psi compressive strength.
      Elongation range ±7%
      P.T. Supports at 48” o.c.
    • 14. Example of Anchor Detail which illustrates the stage-stressing sequence of a transfer girder.
    • 15.
      Post-Tensioning
      Mezzanine Level
      • 14” two-way PT slab
      • 16. Irregular column layout
      • 17. Banded PT in long-direction
    • Post-Tensioning
      Main Concourse Level
      • PT Girder System.
      • 18. Most girders were stage-stressed while upper levels were poured.
      • 19. Supported main pedestrian walkway within ballpark.
      • 20. Champions Club
    • Post-Tensioning
      Club Level
      • PT Girders in one direction.
      • 21. Supported secondary pedestrian walkway
      • 22. Legend’s Club and Metropolitan Club are private lounges.
    • Post-Tensioning
      Suite Level and Terrace Level
      • Similar design but smaller than Club Level.
      • 23. Cantilevered PT Girders had add tendons.
    • Coordination
      No repetition, every girder was unique.
      Mortenson used BIM to model PT tendons using AMSYSCO’s CAD files.
      Many conflicts solved during submittal process.
      “The general who wins the battle makes many calculations before the battle is fought.”
      - Sun Tzu (Art of War)
    • 24. Why Coordination?
    • 25. Coordination
      North/South P.T. girders (in orange) poured and stressed first in order to build upper levels.
      N/S girders required pockets to sleeves E/W tendons.
      East/West P.T. beams (in green) and mild-reinforced beams poured second.
    • 26. Construction
      In order to meet Opening Day 2010, Construction had to start before Design was completed.
      Target Field was built over a BNSF Railroad corridor. Post-Tensioning eliminated the need for re-shoring which kept the railroad operational during construction.
    • 27. Construction
      Project finished 3 months ahead of schedule.
      TIME-LAPSE VIDEO of the construction of Target Field on YouTube.
      Post-Tensioning was used as a cost-effective construction method.
      Target Field’s seating was built in several phases.
    • 28. Target Field was the 2nd MLB stadium to receive LEED certification.
      Earned 36 points towards LEED Silver status.
      Over 30% of construction materials were made from recycled content.
      70% of construction waste was recycled or diverted locally.
      Sustainability
    • 29.
      Sustainability
    • 30. Stadium Highlights
    • 31. Stadium Highlights
    • 32. Grand Opening

    • 33. Grand Opening
      Minnesota Twins beat the Boston Red Sox 5-2 on April 12, 2010
    • 34. Grand Opening
    • 35. Grand Opening

    • 36. Grand Opening

    • 37. Credits
      Sources
      Project Background : http://en.wikipedia.org/wiki/Target_Field
      Target Field rendering : http://www.minnesota.twins.mlb.com/min/ballpark/
      Time-Lapse Video : YouTube via BenjaminLee Palmer
      Sustainability Facts: http://2ndgreenrevolution.com/2010/04/12/twins-target-field-receives-leed-certification/
      Stadium Highlights : http://www.minnesota.twins.mlb.com/min/ballpark/
      Box Score (MN vs. BOS on April 12, 2010) : http://sports.yahoo.com/mlb/preview?gid=300412109
      Quotes
      Highlights
      Images – Logos
      AMSYSCO : http://www.amsyscoinc.com/index.php
      Minnesota Twins : http://www.minnesota.twins.mlb.com
      Mortenson Construction : http://www.mortenson.com/
      Populous: http://www.populous.com/
      Target Field : http://en.wikipedia.org/wiki/File:TargetField.PNG
      Walter P Moore : http://www.walterpmoore.com/
      Images – Photos
      Target Field, Coordination, Sustainability, Grand Opening : Neel Khosa on April 3, 2010 (MN vs. STL)
      Project Background : HOK/Populous
      Metrodome : http://www.worldstadiums.com
      Scoreboard: http://www.daktronics.com
      Seating Profile, Stadium 3D Diagram : http://minnesota.twins.mlb.com/min/ballpark/ballpark_features.jsp
    • 38. THANK
      YOU !!!

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