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 FDNY Memorial Wall at Ground Zero,
Submitted by: DYWIDAG-Systems International USA, Inc. (DSI); PT Supplied by: DYWIDAG-Systems International USA, Inc. (DSI)
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.
Award of Excellence: Joint Traffic Management Center Parking Structure
Submitted by: Baldridge & Associates Structural Engineering, Inc.; PT Supplied by: CMC Cable
In March 2010, the City and County of Honolulu released a competitive Design-Build RFP to design and construct a multi-storied, access-controlled parking structure to accommodate a minimum of 380 cars in addition to providing parking space for sixteen busses and two travel lanes at grade. This project exemplifies the cost-effectiveness of post-tensioning, with the cast-in-place post-tensioned design being selected over a precast, prestressed alternative. The use of post-tensioning allowed the designers to round off two corners to meet the aesthetic requirements of the owner. Building Information Modeling (BIM) was used by the design/construction team to reduce the structure size, resulting in a savings of materials while increasing the number of vehicles that could be accommodated, enabling the structure to attain a LEED Gold rating.
Award of Merit: The Green Screen Parking Structure
Submitted by: American Structurepoint, Inc.; PT Supplied by: AMSYSCO, Inc.
This unique parking structure is an excellent architectural expression that was achieved at an economical cost. The design-build project was completed in 300 days and features a massive installation of vertical green walls comprising 7,000 sq. ft. of Basic Wall™ living, growing vines by GSky Plant Systems Inc., along two of the four sides of the five- story parking garage. With aggressive pricing, efficient geometry, streamlined architecture, and repeatability, the cost per space for the structure came in at approximately $10,500, which is significantly lower than the national average (approximately $16,300/space).
Repair, Rehabilitation and Strengthening
Award of Excellence: Raleigh Durham International Airport – PG-1 Structural Modifications
Submitted by: Walker Parking Consultants/Walker Restoration Consultants; PT Supplied by: DYWIDAG-Systems International USA, Inc. (DSI)
The project involved amputating a significant portion of an existing post-tensioned airport parking structure to allow the airport owner to move a roadway closer to the parking structure. This would allow expansion of a terminal building that was landlocked by runway offsets and roadways. The design/construction team used a variety of post-tensioning repair techniques to provide the most environmentally responsible solution to the owner and in the process overcame many misconceptions regarding PT repair. The overall success of this project exemplifies how the common myths regarding the impossibility of structurally modifying PT structures are unfounded.
Award of Merit: Reinforcement of Driscoll Bridge
Submitted by: DYWIDAG-Systems International USA, Inc.; PT Supplied by: DYWIDAG-Systems International USA, Inc.
Garden State Parkway Structure #127.2, better known as one of the “Driscoll Bridges,” spans the Raritan River in New Jersey. The reinforcement demonstrates the innovative use of post-tensioning to strengthen a badly damaged steel structure, without damaging existing structures. Through several custom PT applications, the project effectively dealt with the constraints of current codes on a very old structure on a very tight schedule and implemented the application of state-of-the-art electromagnetic sensors to monitor the long term force in the cables.
Award of Merit: Rehabilitation of a Parking Garage in Downtown Milwaukee, WI
Submitted by: Wiss, Janney, Elstner Associates, Inc.; PT Supplied by: VSL
The structural rehabilitation of this parking garage involved extensive repairs to the slab post-tensioning system, and the repair techniques used were tailored to enhance the efficiency of the repairs and durability of the repaired structure. The repair project also used external post-tensioning to strengthen beams where the beam tendons had deteriorated due to corrosion. Multiple innovative repair techniques were used to address extensive distress throughout the structure.
Award of Excellence: Emergency Vehicle Operator Course (EVOC)
Submitted by: AMSYSCO, Inc.; PT Supplied by: AMSYSCO, Inc.
Constructed for the Minnesota Department of Military Affairs in Camp Ripley, EVOC is a unique 60,000 sq. ft. post-tensioned concrete slab-on-ground that is made slippery so that vehicle drivers can practice controlling skids. Unlike most concrete slabs of similar square footage, EVOC had two pours of 30,000 sq. ft., which were poured on consecutive days. Since the concrete slab would be exposed to aggressive environments from inclement Minnesota weather and a variety of chemical spills during vehicular testing, the project documents required an encapsulated post-tensioning system designed to PTI specifications.
About the 2013 PTI Convention and Awards Program:
The 2013 PTI Awards Reception and Dinner will take place on the evening of Monday, May 6, 2013. The reception will begin at 6:00 p.m. and the dinner and awards program will follow at 7:00 p.m.
The 2013 PTI Convention will be held May 5-7 at the Hilton Scottsdale Resort and Villas. The convention offers eight technical sessions, over 25 committee meetings, an industry trade show, the 2013 PTI Awards Dinner, and several networking events. Additionally, PTI the Design of Buildings with Post Tensioning seminar and Design of Post-Tensioned Slab-on-Ground with the New PTI Standard DC10.5-12 seminar following the convention on Wednesday, May 8. Reduced convention registration rates are available through April 12. Visit www.post-tensioning.org to learn more.