100 College Street Biomedical Building, New Haven, CT
The new 100 College Street development marks the return of Alexion Pharmaceuticals to the city of New Haven, Connecticut, after many years of being based in the suburbs. The project spans the Route 34 Connector, creating a challenging program for both the building and the adjacent parking structure. To help the projectâ€™s logistics and complement surrounding buildings, designers chose to clad the 14-story building with architectural precast concrete panels.
The architectural precast concrete contractor helped minimize congestion by casting the panels off-site and delivering them as needed each night while the steel frame was erected during the day. The panels were staged at a temporary storage facility near the actual site, which was too constricted to allow panels to be delivered there. The panels were picked from the trucks as they arrived and hoisted into place immediately by the tower crane.
The architectural precast concrete components were fabricated by Coreslab Structures (CONN) Inc. in Thomaston, Connecticut.
100 College Street Parking Garage, New Haven, CT
The new total-precast concrete parking structure being built adjacent to a new biomedical building in New Haven, Connecticut, featured unique challenges, due to its siting over a connector road to the highway still used for deliveries to nearby buildings and access ramps to the facilities. Fabricating the precast concrete components off site and using other precast concrete components to span the roadway minimized congestion and is speeding construction.
The nine-level, 850-car parking structure is designed for use by tenants in the adjacent biomedical building, which also is being constructed. The lateral-load system used for the approximately 325,000-square-foot parking structure consists of a heavy moment frame of precast concrete columns and beams in one direction. It was fabricated in pieces and brought to the site, where it was spliced together to create a monolithic structure. â€œIt works almost like a bridge format to span the road,â€� McCoy says. â€œWe discussed having it built in pieces as the structure was erected, but we decided to build the frame at once to gain the full lateral stability.â€�
The precast concrete components were fabricated by Unistress Corp.
Burlington Woods 4 Office Building, Burlington, MA
Architectural precast concrete panels were chosen to clad the new $35-million, 100,000-square-foot office building known as 4 Burlington Woods in Burlington, Massachusetts. The project expands the existing six-building office park and was designed for end-user flexibility to accommodate a range of tenants.
The spec office building, scheduled for completion in early 2015, will feature a two-story lobby, interconnecting stairways, floor-to-ceiling windows along the main faÃ§ade, and energy-efficient systems designed to allow the building to achieve LEED certification. The large-sized precast concrete panels were cast with a light sandblast finish with horizontal accent bands with a medium sandblast finish to provide contrast and create visual interest.
â€œWe wanted to project the image of a contemporary office building by using precast concrete panels to create a distinctive pallete of finishes within the complex that wonâ€™t date over time,â€� says Keith Boyle, associate principal and project manager at CUBE 3 Studio, which designed the project. â€œWe knew precast concrete could create a clean, crisp, and refined-looking product that would mesh well with the look of the rest of the campus.â€�
The precast concrete components were fabricated by Strescon Limited.
275 Wyman Parking Garage, Waltham, MA
When developers of the 275 Wyman Street office complex in Waltham, Massachusetts, decided to replace an existing 100,000-square-foot building with a 350,000-square-foot facility, they knew they would need to ramp up the parking space, too. To do so, they created a six-story total-precast concrete parking structure that maximized space under zoning laws while saving time and money.
The 324,000-square-foot project features 1,025 spaces on a tight site. Designers specified precast concrete for several reasons, including its ability to provide the most efficient design, says Brad Cardoso, senior associate and project manager at Margulies Perruzzi Architects, the design firm on the project.
The erection went smoothly, with one crane working from within the footprint and walking out backwards as the structure was erected, says Jon Sutphin, project executive for Commodore Builders, the projectâ€™s construction manager. â€œIt was a tight site, so there wasnâ€™t much room to maneuver,â€� he says. The plaza was constructed first, followed by the parking levels. â€œI love precast concreteâ€”it goes up quickly, and itâ€™s done. Blakeslee did a great job on both the engineering and the construction on the project.â€�
The project also impressed the judges of the 2014 Design Awards competition sponsored by the Precast/Prestressed Concrete Institute, who gave it the award for Best Transportation Special Solution.
The precast components were fabricated by Blakeslee Prestress, Inc.
NOW AVAILABLE ONLINE
Bridge Guideline: December 2014
Guidelines for Accelerated Bridge Construction Using Precast/Prestressed Concrete Components Including Guideline Details, Second Edition.
This guide (second edition) is the current State-of-the-Art report developed by the PCI Northeast Bridge Technical Committee on the use of Precast/Prestressed Concrete Components to accelerate the construction of bridge projects. The guide will assist designers in determining which means and methods would be appropriate for considering accelerated construction techniques. This guide will offer solutions from deck replacement to total reconstruction of a bridge.
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