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Looking to the Future by Craig A FOCUS CELEBRATING THE PAST, Looking to the Future by Craig A. Shutt Completed in December 2009, the $125-million Route 36 Bridge over the Shrewsbury River in Sea Bright, N.J., replaced an existing bascule bridge with a high-level precast concrete segmental box girder design supported on precast, post-tensioned concrete piers. Hardesty & Hanover designed two pedestrian bridges for the project and provided engineering services, including concrete pier design and seismic analysis. All photos: Hardesty & Hanover. Hardesty & Hanover and other movable-bridge innovations. so we can first deliver a service and The firm’s work still includes many ultimately create the best product for enters its 125th year movable bridges, but expansion into them. Our project managers stress other sectors has enabled its designers communication and teamwork.” with innovative to implement new techniques and innovations. Assessing Original Designs techniques for The firm’s long history has allowed it to “We are experienced in all types of return to some of its original designs. designing bridges bridges, both fixed and movable,” “We have a long history of building says Glen Schetelich, a partner in the durable structures,” notes Tim Noles, that are more New York-based engineering firm’s a partner in the Sunrise, Fla., office. Hoboken, N.J., office. The firm’s “Having the original plans for a project durable, faster engineers have focused primarily on can be beneficial during rehabilitation mid- to short-span bridges, which have work, because it gives us insight into the to construct, and involved a range of challenges dealing original intent. Frequently, the owners with terrain, environmental concerns, themselves no longer have copies of the more aesthetically owners’ growing needs, and additional plans.” community input. pleasing The firm has extensive history with “Our clients look to us because of the rehabilitation, often analyzing bridges Bridge engineering has changed depth of service we provide,” adds to determine if they can be preserved. drastically since Hardesty & Hanover Keith Griesing, director of engineering. “In some cases, we try to rehabilitate opened its doors in 1887. Founder “Many companies are technically a bridge in kind, with improvements Dr. J. A. L. Waddell was a leader in capable of creating bridges, but they to meet current AASHTO criteria,” reinforced concrete and steel bridge aren’t as attuned to the client’s needs as Noles notes. “But often we replace a design and held the patent for the we are. Our goal is to partner with our movable bridge with a new high-level, first modern vertical-lift bridge design clients and understand their challenges fixed bridge.” That is happening more 8 | ASPIRE, Winter 2011 ‘We are experienced in all types of bridges, both fixed and movable.’ The new $43 million precast concrete bridge along Route 35 over the Shark River in he notes. “It was interesting to me that Belmar, N.J., extends 2000 ft using 17 spans of AASHTO girders, including a main span of they were more interested in the ‘how’ 170 ft. The bridge, which replaced a bascule bridge that disrupted traffic to beachfront than in the ‘what,’ ” he says. “The communities, is 84 ft wide and carries four lanes of traffic. construction staging, scheduling, and interaction with the work on a daily today, Schetelich adds. “The federal also understand the owner’s goals and basis were key parts of the process.” government especially is looking to can represent those to the community. replace movable bridges, if it’s feasible.” Today, engineering represents one small Aesthetics part of the puzzle in moving a project a Growing Priority For instance, the Route 36 Bridge over from its concept to completion.” Aesthetics also was a concern on the the Shrewsbury River in Monmouth Roslyn Viaduct, as it often is in such County, N.J., a 75-year-old double-leaf That was a key challenge for the new meetings, he adds. “Owners are bascule bridge, was replaced with a design of the Roslyn Viaduct project realizing that aesthetics have a great high-level structure consisting of precast along Route 25A over Hempstead value to a community, particularly as concrete segmental box girders and Harbor in Roslyn, N.Y. The 29-span, pin- older, established bridges are replaced. precast, post-tensioned concrete piers. and-hanger steel viaduct was replaced Citizens want a proportionate structure The new bridge increases clearance to with twin concrete segmental box- that reflects the community and the 65 ft along this main corridor to New girder bridges built using the balanced- surrounding environment. It’s going Jersey’s eastern beaches and the national cantilever method. The 2200-ft-long to be there for a long time, and those park at Sandy Hook. Hardesty & Hanover viaduct and its 2775-ft-long approach concerns have to be taken seriously. You designed two adjoining pedestrian roadway and ramps were replaced in have to partner with the community to bridges and provided geotechnical staged construction including innovative get it right,” says Greising.” engineering, foundation and segmental design schemes to minimize traffic concrete pier design, scour and seismic congestion. More details of this project That’s especially important for many analysis, and utility relocation and are provided in the Fall 2009 issue of structures in Florida, adds Noles. “It’s a access. More details of this project are ASPIRE. national trend, but Florida is a leader in provided in the Summer 2010 issue of creating aesthetically pleasing bridges. ASPIRE.™ The New York State Department of That’s because of its tourist industry Transportation set up a Bridge Task and the many bridges along the coast, A similar replacement occurred with the Force that met monthly with community where they are landmarks in the former Route 35 Bridge over Shark River groups and concerned citizens. “We community. The state wants its bridges in Belmar, N.J., where a low-level bascule really got to know the people most to make an impression, because they bridge was replaced by a 2000-ft-long, involved, and they learned about us,” add to the scenic landscape and can high-level, prestressed concrete bridge says Griesing. “The repetition created a have a financial impact.” with AASHTO girders comprising 17 more relaxed atmosphere so we could spans, including a main span of 170 ft. discuss concerns more informally.” That was certainly the case when Hardesty & Hanover redesigned the Community Input Increases The meetings included new ideas Sanibel Island Causeway over San Carlos Movable bridges often are replaced garnered from the groups and handouts Bay in 2006. The firm first conducted due to the growing focus on user costs, that showed the current plan. “This was an in-depth inspection of the existing which have become a key priority for a new approach to a project for me, and double-leaf, Hopkins Trunnion-type bridge owners. This concern often leads it required a different set of skills than bascule bridge with accompanying to more community input on each aspect engineers typically use,” he says. “But steel-stringer flanking spans. of the project. “Some projects require I expect it will occur more often with a lot of community outreach, and, in bridge owners.” Then it developed construction plans those cases, we serve as the owner’s and specifications to implement the partner,” explains Griesing. “We can The biggest concerns were the recommended high-level fixed bridge, answer the technical questions, but we construction process and disruptions, consisting of precast, prestressed ‘Owners are realizing that aesthetics have a great value to a community.’ ASPIRE, Winter 2011 | 9 ‘We are always looking for new ideas Adds Noles, “Many owners prefer and working with concrete, because they won’t have to manufacturers to find paint it, even with new painting systems that extend paint life. Concrete bridges new concepts.’ can result in lower maintenance costs than steel bridges.” concrete Florida bulb-tee girders spanning a maximum of 144 ft over Concrete bridges also are being 21 spans for a total length of 2996 ft. considered more often due to the speed The substructure features canted-leg with which they can be built once reinforced concrete piers founded on the site is available. Precast concrete precast, prestressed concrete piles. The components in particular can reduce The design of the $127-million precast substructure was designed for vessel- the amount of time needed for road concrete Roslyn Viaduct project over collision impacts and a 100-year storm closures, even if they don’t speed up the Hempstead Harbor in Roslyn, N.Y., was scour. See the related article, “Concrete overall design-to-completion time, notes developed with input from a Bridge Bridges in Lee County, Florida,” in the Griesing. “They provide a more intense Task Force that included local public Spring 2009 issue of ASPIRE. impact for a shorter duration, which officials and appointed representatives officials like.” of community groups. Those discussions “The biggest challenge was working included the replacement bridge with citizen groups to create a design Preconstruction activity has increased, and pier types, staged construction, that satisfied their concerns and met the he adds, because it keeps the site clear traffic noise concerns, aesthetics, owner’s needs,” says Noles. Its impact and open for longer. “New York State environmental impact, business impact, on the skyline was a particular concern, likes precast concrete projects,” he says. and other factors. as were aesthetic treatments and colors “They like the prefabrication aspect, for railings, MSE walls, and other visible as well as the shop-level quality of the elements. “We invited the community components and the amount that can to provide ideas and incorporated be done in a short time once the pieces many of them into the design during a arrive at the site.” 3-month process.” Using the NEXT Beam Interchange in Queens, N.Y., which Maintenance is Key The firm recently worked with PCI consists of the Van Wyck Expressway, Owners also are guarding their long- Northeast, a chapter of the Precast/ Grand Central Parkway, and the term budgets more than ever.
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