Award of Merit: I-64 Kanawha River Bridge
Submitted by: T.Y. Lin International
PT Supplied by: VSL
The bridge is a record-setting, low-cost, durable, and aesthetically pleasing post-tensioned box girder structure built as part of the I-64 Widening Project in Kanawha County, WV. The project demonstrates the cost-effectiveness of post-tensioned segmental box girder construction with the bid price for the PT box girder bridge design coming in at $30 million - 27 percent - less than the structural steel alternative. The “S-Curve” alignment complicated the bridge geometry, and the use of PT made long-span balanced cantilever construction possible and minimized the construction impact to local roads and to navigation on the Kanawha River.
Award of Excellence: San Francisco Public Utilities Commission Headquarters
Submitted by: Tipping Mar, Structural Engineering
PT Supplied by: AVAR Construction Systems, Inc.
The LEED Platinum-designed San Francisco Public Utilities Commission (SFPUC) Headquarters will be honored for its innovative post-tensioned design that exemplifies post-tensioning’s capabilities to save material, improve seismic resilience, enhance functionality, and speed up construction. It stands today as a model for water conservation, energy performance, and indoor air quality. Moreover, the novel, vertically post-tensioned concrete structure gives the SFPUC building superior resilience and the ability to self-center after a large earthquake with only minimal damage resulting, making immediate reoccupation possible.
Award of Merit: 2201 Westlake/Enso
Submitted by: Cary Kopczynski & Co
PT Supplied by: PTC Incorporated
2201 Westlake/Enso is a cast-in-place concrete structure featuring concrete shear walls and a combination of one-way and two-way post-tensioned slabs. The structural frame was selected to satisfy the architectural layout without compromising the owner’s vision for open and spacious floor plans for office, retail, residential and parking stacked vertically without column offsets and transfers. The project used an innovative combination of PT and high strength concrete and reinforcement. The long-span PT design facilitated the minimal use of interior columns and the construction of a curved exterior façade.
Award of Merit: The Trump International Hotel & Tower
Submitted by: Baldridge & Associates Structural Engineering, Inc.
PT Supplied by: RPS Cable, Inc.
The Trump International Hotel & Tower, located on Waikiki Beach, is a 38- story luxury hotel and condominium. This highly desirable address set a world record for sales, selling all 464 units in eight hours for a total of over $700 million. This challenging mixed use design has 19 structurally unique floors that effectively use post-tensioning to optimize functional space and maximize value for owners and occupants. The building includes optimized thin post-tensioned slabs, 23 transfer girders, a 10 in. thick post-tensioned transfer slab at the penthouse, sloping columns, numerous wall-to-column transitions, unique composite steel plate link beams, and uninterrupted views of the Pacific Ocean.
Award of Excellence: Target Field
Submitted by: AMSYSCO, Inc.
PT Supplied by: AMSYSCO, Inc.
The use of post-tensioning facilitated a complex construction schedule and allowed that design/construction team to deal with challenging site conditions. One of the greatest benefits of post-tension construction at Target Field was along the third base line over the railroad corridor. The post-tension design reduced the amount of concrete volume, eliminated the need for re-shoring through the rail corridor, and enabled the Construction Manager to coordinate a complicated sequence of construction.
Award of Merit: The Memorial Wall at Ground Zero,
Submitted by: DYWIDAG-Systems International USA, Inc.
PT Supplied by: DYWIDAG-Systems International USA, Inc.
The FDNY Memorial Wall, located opposite Ground Zero, has already been completed and was dedicated by the President George W. Bush on September 11, 2011. DSI’s Post-Tensioning/Tieback Anchor System played a critical role in the stabilization and excavation work at the beginning of the rebuilding process and reconstruction of the foundations. This cost-effective solution reduced construction time over other methods, reduced obstruction of the work area and front face of the wall, and provided permanent stabilization of the structure by preloading to high tension forces.