Benicia-Martinez Bridge, California T.Y. Lin International, as part of a joint venture, completed final design and prepared plans and construction estimates for the segmental concrete girder bridge. Because of hazardous materials located on the south shore, the segmental construction method enabled Caltrans to cross the area without touching the ground during construction. Sidney Lanier Bridge, Brunswick, Georgia Acknowledging increased access to the busy Port of Brunswick, the Sidney Lanier Bridge opened to traffic in 2003. T.Y. Lin International performed the concrete alternative design and provided construction support services to the owner. San Francisco-Oakland Bay Bridge East Span, California T.Y. Lin International worked closely with community organizations to create a visually appealing and structurally sound design that would withstand a maximum credible earthquake, limit environmental impact to the Bay, and capture the area’s culturally progressive spirit and rich tradition of suspension bridges. Caiyuanba Bridge, Chongqing, China Because the bridge will become a prominent part of the skyline, residents of Chongqing chose an aesthetically pleasing arch bridge design for the city’s new landmark. T.Y. Lin International engineers completed the design of this fast-track bridge project in just nine months, in time for construction to begin during the dry season. The Centennial Bridge, Panama Canal, Panama Built to promote growth on Panama’s western side, T.Y. Lin International completed the bridge design while construction was already underway, working with the contractor to complete the fast-track project in just 27 months. Arthur Ravenel Jr. Bridge, Charleston, South Carolina Committed to supporting to the local economy, T.Y. Lin International and our joint venture partner established a project office in Charleston and a community outreach program for local residents. We provided design review, construction engineering, and field inspection services for the new high-level bridge over the Cooper River. In today’s rapidly changing transportation landscape, T.Y. Lin International understands that bridges not only improve mobility, they also reflect and shape the communities they serve. Bridges have always served as powerful symbols of connection, expansion, and progress, but as modern public works projects grow increasingly complex, bridges also represent something more — partnerships. Nowhere is this partnership more evident than in our client relationships and our holistic approach towards project delivery. Our clients look to us for more than technical consulting; they want to work with us to create unique transportation solutions that satisfy a distinct, diverse group of stakeholders. The trust we build between our project teams has enabled T.Y. Lin International to deliver some of the most significant landmark bridge projects in the world, renowned for their technical achievements, aesthetics, and the enhancements they provide to surrounding communities. We believe in the power of bridges to connect people, and we continue to embody the innovative spirit that has always made T.Y. Lin International a pioneer in the advancement of bridge engineering and project delivery. Bridges that Build Communities Shenzhen Western Corridor, Hong Kong, China Working closely with the contractor, T.Y. Lin International devised a fast-track, environmentally-friendly construction scheme that eliminated the need for temporary piles during construction. The new bridge, a boon to the local economy, links Hong Kong to China’s mainland. Long-Span Bridges: Partnering for Success T.Y. Lin International Founded in 1954, T.Y. Lin International (www.tylin.com) is a globally recognized, full-service infrastructure consulting firm. With more than 1,000 engineers and planners throughout the United States and Asia, the San Francisco-based firm can deliver project-specific solutions to a variety of clients throughout the public and private sectors. Trade publication Engineering News-Record has included T.Y. Lin International in its annual lists of top bridge design, transportation design, and design firms. BRIDGE SERVICES Planning/Concepts Design Construction Engineering Construction Support/Services Program Management Rehabilitation and Repair Seismic Retrofit Design/Build Public-Private Partnerships (P3) BRIDGE TYPES Arch Segmental Suspension Cable-stayed Conventional Pedestrian Specialty For more information about T.Y. Lin International bridge projects or to contact us, please visit our website at www.tylin.com, email [email protected], or call us at 415.291.3700. Bih-Tan Bridge, Taipei, Taiwan Taiwan’s Ministry of Transportation and Communications requested an elegant design with great visual appeal. T.Y. Lin International engineers combined their knowledge of concrete segmental construction with a design whose simple lines cast the eye on the geometry of the two delta arches—and in doing so, exceeded everyone’s expectations. Dagu Bridge, Tianjin, China Designed to withstand the highest class of seismic forces in China, Dagu Bridge is a feat of engineering that also serves as a new symbol for the city of Tianjin. Dagu Bridge crosses the Haihe River which is said to resemble a mythical Chinese dragon. The new bridge’s asymmetrical arches represent the sun and moon. Hence the motto, ”The sun and the moon dance with the golden dragon.” Second MacArthur Bridge, Taipei, Taiwan The longest Nelson tied arch bridge which carries the Tien Mu Expressway across the Keelung River was the first of its kind when it opened to traffic in 1995. With a total length of 210 meters and inclined arch ribs that almost meet at the crown, the MacArthur Bridge brings both visibility and grace to the Taipei Skyline. Hoover Dam Bypass, Clark & Mohave Counties, Nevada & Colorado The challenge? Design a bridge that complements the neighboring Hoover Dam. T.Y. Lin International engineers prevailed with a concrete composite arch span that crosses the rugged Black Canyon. When complete, it will be the longest concrete arch bridge in the U.S. as well as the first hybrid bridge of its kind, combining a composite steel deck with a segmental concrete arch and spandrels. Crooked River Bridge, Terrebone, Oregon One transportation official called the Crooked River Bridge the “marquee project of the decade.” The grandeur of the Crooked River gorge coupled with the adjacent, famed Conde McCullough Bridges demanded a careful consideration of architecture, environment, and bridge type. Caiyuanba Bridge, Chongqing, China Located in the “Bridge Capital of China,” the world’s longest basket-handle arch bridge was designed with an eye toward aesthetics. A pair of steel boxes forms the arches, giving the bridge its slender appearance, while the arch ribs incline inward, making the bridge seem lightweight. Its combined beauty and functionality (carrying both highway and rail traffic on its double-deck truss) led the owner to hail the design as a perfect blend of form and function. For the past five decades, T.Y. Lin International engineers have brought their creativity and ingenuity to bear on the design of arch bridges. But as communities have grown and become increasingly mobile, so too the designs have become more complex. Today’s bridges must carry life spans of 100 years or more, and our engineers have worked harder to increase their T.Y. Lin International has played a vital role in the design and construction of arch bridges that set the standard for design excellence. We take pride in building arches that last longer than a lifetime, as they represent more than simply structures that span a canyon, lake, or gorge. They are symbols of connection and beautiful displays of engineering. As visionary artists, we continue to imagine the structures of tomorrow and shape our ever-evolving Lowry Avenue Bridge, Hennepin County, Minnesota Driven by a high-profile public involvement process, Hennepin County chose T.Y. Lin International for our ability to design a signature bridge that features streamlined structural elements. Engineers introduced new hangers that are internally connected to the arch box girder sections, resulting in no outward appearance of gusset plates. The sections of the arch are bolted internally, resulting in a smooth external finish of the arch. Founded in 1954, T.Y. Lin International (www.tylin.com) is a globally recognized, full-service infrastructure consulting firm. With more than 1,000 engineers and planners throughout the United States and Asia, the San Francisco-based firm can deliver project-specific solutions to a variety of clients throughout the public and private sectors. Trade publication Engineering News-Recordhas included T.Y. Lin International in its annual lists of top bridge design, transportation design, and design firms. BRIDGE SERVICES Planning/Concepts Design Construction Engineering Construction Support/Services Program Management Rehabilitation and Repair Seismic Retrofit Design/Build Public-Private Partnerships (P3) BRIDGE TYPES Arch Segmental Suspension Cable-stayed Conventional Pedestrian Specialty For more information about T.Y. Lin International bridge projects or to contact us, please visit our website at www.tylin.com, email [email protected], or call us at 415.291.3700. Arch Bridges: Elegant Strength T.Y. Lin International Taiwan High Speed Rail, Taiwan For this Build-Operate-Transfer mega-project, T.Y. Lin International performed the preliminary and final designs for 25 elevated bridges representing a total length of approximately 30 km. Undaunted by the project’s magnitude and complexity, engineers designed an energy-dissipating locking system to limit the bridge superstructure displacement to within five mm under train braking and acceleration forces. Kanawha River Bridge, South Charleston, West Virginia T.Y. Lin International embraced the opportunity to design an aesthetically pleasing bridge in the face of strict budget requirements. Engineers reduced costs by conducting a pre-construction drilled shaft load test for the foundations, and reduced maintenance by incorporating expansion joints only at the abutments, resulting in an economical design that also boasts the longest concrete box girder span in the U.S. at 760 feet. Benicia-Martinez Bridge, California T.Y. Lin International and a joint venture partner completed the final design and prepared plans and construction cost estimates for the segmental concrete box girder bridge, which serves as a seismic lifeline structure to the San Francisco Bay Area. Design innovations include the unique application of midspan hinges between the frames, atypical for a high-seismic zone but necessary to eliminate differential rotations due to heavy loads. Jamuna Multipurpose Bridge, Sirajganj, Bangladesh T.Y. Lin International prepared the winning pre-bid design for Hyundai Engineering and Construction as well as the final design, plans, and quantities for this Design-Build project. At a total length of 4.8 km, the world’s eleventh longest bridge was designed to withstand a maximum credible earthquake. T.Y. Lin International’s constructible design featured 3.15-m-diameter piles ensuring the structure’s stability against seasonal monsoons. H-3 North Halawa Valley Viaduct, Oahu, Hawaii T.Y. Lin International provided complete design and construction support services for a pair of 6,000 ft twin curved viaducts built over seismically active and environmentally sensitive terrain. Engineers used 2,000 ft frames to minimize the number of expansion joints, reducing both maintenance and life cycle costs. San Francisco-Oakland Bay Bridge East Span Skyway, California T.Y. Lin International engineers faced the challenge of designing a viaduct with two parallel roadways, the components of which could be readily repaired and/or replaced in the event of a major earthquake of 7.2–8.0 magnitude. From the seismically resistant foundation to the highly ductile pre-cast deck segments, each component was tested for performance and post-earthquake repairability, a practice not commonly used by engineers—until now. With today’s increasing demand for reliable and economical infrastructure, T.Y. Lin International understands the value of combining advanced design methods with practical construction knowledge to develop cost-effective, aesthetic structures for our clients. The well-rounded expertise of our engineering team allows us to apply innovative solutions throughout the design and construction process, and the results speak for themselves— award-winning projects delivered to satisfied clients. Nowhere is this ingenuity more evident than in the design and construction of the new San Francisco-Oakland Bay Bridge East Span Skyway. The structure’s pre-cast girder segments are thought to be the largest ever built, with spans weighing as much as 800 tons. In addition to setting the record books, T.Y. Lin International engineers kept an eye on costs, utilizing the balanced-cantilever method of construction to erect the segments. The 525 ft long spans reduced the number of piers and minimized the cost of the deep foundations. Our flexibility, creativity, and knowledge gained from years of experience in the field embody the innovative spirit that has always made T.Y. Lin International a pioneer in the advancement of bridge engineering. Shibanpo Bridge, Chongqing, China Now the longest concrete box girder bridge in the world, the 330 m main-span Shibanpo Bridge connects Chongqing’s business district to the southern district over the Yangtze River. In order to accommodate ship traffic, T.Y. Lin International engineers designed a unique 103 m steel box section to extend the main span of the bridge. This innovative solution made the best use of available materials, kept the project on schedule, and made the structure economically efficient. Segmental Bridges: Innovation at Work T.Y. Lin International Founded in 1954, T.Y. Lin International (www.tylin.com) is a globally recognized, full-service infrastructure consulting firm. With more than 1,000 engineers and planners throughout the United States and Asia, the San Francisco-based firm can deliver project-specific solutions to a variety of clients throughout the public and private sectors. Trade publication Engineering News-Recordhas included T.Y. Lin International in its annual lists of top bridge design, transportation design, and design firms. BRIDGE SERVICES Planning/Concepts Design Construction Engineering Construction Support/Services Program Management Rehabilitation and Repair Seismic Retrofit Design/Build Public-Private Partnerships (P3) BRIDGE TYPES Arch Segmental Suspension Cable-stayed Conventional Pedestrian Specialty For more information about T.Y. Lin International bridge projects or to contact us, please visit our website at www.tylin.com, email [email protected], or call us at 415.291.3700. I-4/Lake Ivanhoe Pedestrian Bridge, Orlando, Florida This modern bridge provides connectivity within Orlando’s Urban Trail System, marking the entrance/exit of downtown Orlando. After extensive coordination with a design review committee comprised of State DOT officials and the greater Orlando community, TYLI developed an arch configuration that promises residents an iconic, bicycle and pedestrian-friendly structure. Diamondback Bicycle/Pedestrian Bridge, Tucson, Arizona In 1997, a local Tucson artist was selected by the client and a local arts council for the idea of designing a bridge shaped like a snake. This award-winning bridge integrates post-tensioning applications with classical construction methods to imitate the features of a Diamondback rattlesnake. Using a creative combination of metal fencing, a diamond-shaped steel tubing configuration, and a tub-shaped box girder, TYLI’s signature bridge embraced the practice of functional art. The Bridges at Rancho Santa Fe, Rancho Santa Fe, California Using an innovative stressed-ribbon design that takes maximum advantage of modern prestressing steel, these surprisingly rigid bridges span 80-foot-deep, 300-foot-wide canyons with no intermediate supports. The stressed-ribbon method does away with tall piers, falsework, and associated environmental impacts by making use of the near-surface bedrock at each edge of the canyon. Lake Hodges Bicycle and Pedestrian Bridge, San Diego, California TYLI provided concept studies, detailed design, and resident engineering and inspection services during construction for what is the world’s longest stressed- ribbon bridge, the approximately 1,000-foot crossing of Lake Hodges. With three spans of 330 feet and a depth of only 16 inches, the depth to span ratio is an amazing 1 to 248, enabling the dramatic crossing to “float” across the lake. Blue Heron Pedestrian Bridge, Newton and Watertown, Massachusetts Aesthetics played a key role in determining the final design for this 140-foot-long painted and galvanized steel-tilted tied arch bridge that links two Massachusetts communities. A highly visible centerpiece, the Blue Heron Bridge befits its rustic surroundings, accommodating joggers and cyclists. Cedar Avenue Bridge, Flagstaff, Arizona With its dramatic backdrop of Flagstaff’s San Francisco Peaks, this impressive arch links the Flagstaff Urban Trail System and the Arizona Trail System, providing a safe crossing for hikers and cyclists over busy Cedar Avenue. The design of this variable-depth, post-tensioned box girder utilized 5000-psi concrete, resulting in a very thin structure at the center span. Crossing over the bridge and passing underneath the 138-foot single span imparts an open, airy feeling for both pedestrians and drivers. Historically, pedestrian bridge designs have met the critical need for safety in areas where transportation networks typically favored motorized versus non-motorized modes of travel. However, many of today’s crossings satisfy practical requirements such as pedestrian safety while still addressing equally pressing issues such as creating more livable urban environments. No longer just about getting people from point to point on foot, pedestrian bridges generate community pride and serve as landmarks in their own right. T.Y. Lin International (TYLI) has been at the forefront of footbridge bridge design for decades. Our designs are a collaboration between the engineer and the community, culminating in definitive and oftentimes artful structures that serve a plethora of uses. Whether it’s a destination bridge or a bridge that enhances its natural surroundings, TYLI skillfully designs footbridges for every purpose. Harbor Drive Pedestrian Bridge, San Diego, California Located adjacent to the San Diego Convention Center, the Harbor Drive Pedestrian Bridge is a graceful single-cable, self-anchored suspension bridge with a single inclined pylon and a curved deck suspended only along its inside edge. Due to its prominent location and unique appearance, the bridge will serve as a southern gateway to downtown San Diego. Founded in 1954, T.Y. Lin International (www.tylin.com) is a globally recognized, full-service infrastructure consulting firm. With more than 1,000 engineers and planners throughout the United States and Asia, the San Francisco-based firm can deliver project-specific solutions to a variety of clients throughout the public and private sectors. Trade publication Engineering News-Recordhas included T.Y. Lin International in its annual lists of top bridge design, transportation design, and design firms. BRIDGE SERVICES Planning/Concepts Design Construction Engineering Construction Support/Services Program Management Rehabilitation and Repair Seismic Retrofit Design/Build Public-Private Partnerships (P3) BRIDGE TYPES Arch Segmental Suspension Cable-stayed Conventional Pedestrian Extradosed Stressed Ribbon Specialty For more information about T.Y. Lin International bridge projects or to contact us, please visit our website at www.tylin.com, email [email protected], or call us at 415.291.3700. Pedestrian Bridges: Blending Form and Function T.Y. Lin International
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Benicia-Martinez Bridge, CaliforniaT.Y. Lin International, as part of a joint venture, completed final design and prepared plans and construction estimates for the segmental concrete girder bridge. Because of hazardous materials located on the south shore, the segmental construction method enabled Caltrans to cross the area without touching the ground during construction.
Sidney Lanier Bridge, Brunswick, GeorgiaAcknowledging increased access to the busy Port of Brunswick, the Sidney Lanier Bridge opened to traffic in 2003. T.Y. Lin International performed the concrete alternative design and provided construction support services to the owner.
San Francisco-Oakland Bay Bridge East Span, CaliforniaT.Y. Lin International worked closely with community organizations to create a visually appealing and structurally sound design that would withstand a maximum credible earthquake, limit environmental impact to the Bay, and capture the area’s culturally progressive spirit and rich tradition of suspension bridges.
Caiyuanba Bridge, Chongqing, ChinaBecause the bridge will become a prominent part of the skyline, residents of Chongqing chose an aesthetically pleasing arch bridge design for the city’s new landmark. T.Y. Lin International engineers completed the design of this fast-track bridge project in just nine months, in time for construction to begin during the dry season.
The Centennial Bridge, Panama Canal, PanamaBuilt to promote growth on Panama’s western side, T.Y. Lin International completed the bridge design while construction was already underway, working with the contractor to complete the fast-track project in just 27 months.
Arthur Ravenel Jr. Bridge, Charleston, South CarolinaCommitted to supporting to the local economy, T.Y. Lin International and our joint venture partner established a project office in Charleston and a community outreach program for local residents. We provided design review, construction engineering, and field inspection services for the new high-level bridge over the Cooper River.
In today’s rapidly changing transportation landscape, T.Y. Lin International understands that bridges not only improve mobility, they also reflect and shape the communities they serve. Bridges have always served as powerful symbols of connection, expansion, and progress, but as modern public works projects grow increasingly complex, bridges also represent something more — partnerships.
Nowhere is this partnership more evident than in our client relationships and our holistic approach towards project delivery. Our clients look to us for more than technical consulting; they want to work with us to create unique transportation solutions that satisfy a distinct, diverse group of stakeholders. The trust we build between our project teams has enabled T.Y. Lin International to deliver some of the most significant landmark bridge projects in the world, renowned for their technical achievements, aesthetics, and the enhancements they provide to surrounding communities.
We believe in the power of bridges to connect people, and we continue to embody the innovative spirit that has always made T.Y. Lin International a pioneer in the advancement of bridge engineering and project delivery.
Bridges that Build
Communities Shenzhen Western Corridor, Hong Kong, ChinaWorking closely with the contractor, T.Y. Lin International devised a fast-track, environmentally-friendly construction scheme that eliminated the need for temporary piles during construction. The new bridge, a boon to the local economy, links Hong Kong to China’s mainland.
Long-Span Bridges:Partnering for Success
T.Y. Lin International
Founded in 1954, T.Y. Lin International (www.tylin.com) is a globally recognized, full-service infrastructure consulting firm. With more than 1,000 engineers and planners throughout the United States and Asia, the San Francisco-based firm can deliver project-specific solutions to a variety of clients throughout the public and private sectors. Trade publication Engineering News-Record has included T.Y. Lin International in its annual lists of top bridge design, transportation design, and design firms.
BRIDGE SERVICES
Planning/Concepts
Design
Construction Engineering
Construction Support/Services
Program Management
Rehabilitation and Repair
Seismic Retrofit
Design/Build
Public-Private Partnerships (P3)
BRIDGE TYPES
Arch
Segmental
Suspension
Cable-stayed
Conventional
Pedestrian
Specialty
For more information about T.Y. Lin International bridge projects or to contact us, please visit our website at www.tylin.com, email [email protected], or call us at 415.291.3700.
Bih-Tan Bridge, Taipei, TaiwanTaiwan’s Ministry of Transportation and Communications requested an elegant design with great visual appeal. T.Y. Lin International engineers combined their knowledge of concrete segmental construction with a design whose simple lines cast the eye on the geometry of the two delta arches—and in doing so, exceeded everyone’s expectations.
Dagu Bridge, Tianjin, ChinaDesigned to withstand the highest class of seismic forces in China, Dagu Bridge is a feat of engineering that also serves as a new symbol for the city of Tianjin. Dagu Bridge crosses the Haihe River which is said to resemble a mythical Chinese dragon. The new bridge’s asymmetrical arches represent the sun and moon. Hence the motto, ”The sun and the moon dance with the golden dragon.”
Second MacArthur Bridge, Taipei, TaiwanThe longest Nelson tied arch bridge which carries the Tien Mu Expressway across the Keelung River was the first of its kind when it opened to traffic in 1995. With a total length of 210 meters and inclined arch ribs that almost meet at the crown, the MacArthur Bridge brings both visibility and grace to the Taipei Skyline.
Hoover Dam Bypass, Clark & Mohave Counties, Nevada & ColoradoThe challenge? Design a bridge that complements the neighboring Hoover Dam. T.Y. Lin International engineers prevailed with a concrete composite arch span that crosses the rugged Black Canyon. When complete, it will be the longest concrete arch bridge in the U.S. as well as the first hybrid bridge of its kind, combining a composite steel deck with a segmental concrete arch and spandrels.
Crooked River Bridge, Terrebone, OregonOne transportation official called the Crooked River Bridge the “marquee project of the decade.” The grandeur of the Crooked River gorge coupled with the adjacent, famed Conde McCullough Bridges demanded a careful consideration of architecture, environment, and bridge type.
Caiyuanba Bridge, Chongqing, China Located in the “Bridge Capital of China,” the world’s longest basket-handle arch bridge was designed with an eye toward aesthetics. A pair of steel boxes forms the arches, giving the bridge its slender appearance, while the arch ribs incline inward, making the bridge seem lightweight. Its combined beauty and functionality (carrying both highway and rail traffic on its double-deck truss) led the owner to hail the design as a perfect blend of form and function.
For the past five decades, T.Y. Lin International engineers have brought
their creativity and ingenuity to bear on the design of arch bridges. But as
communities have grown and become increasingly mobile, so too the designs
have become more complex. Today’s bridges must carry life spans of 100
years or more, and our engineers have worked harder to increase their
structural efficiency with great success.
T.Y. Lin International has played a vital role in the design and construction
of arch bridges that set the standard for design excellence. We take pride
in building arches that last longer than a lifetime, as they represent more
than simply structures that span a canyon, lake, or gorge. They are symbols
of connection and beautiful displays of engineering. As visionary artists, we
continue to imagine the structures of tomorrow and shape our ever-evolving
bridgescape.
Bridges That
Inspire Lowry Avenue Bridge, Hennepin County, MinnesotaDriven by a high-profile public involvement process, Hennepin County chose T.Y. Lin International for our ability to design a signature bridge that features streamlined structural elements. Engineers introduced new hangers that are internally connected to the arch box girder sections, resulting in no outward appearance of gusset plates. The sections of the arch are bolted internally, resulting in a smooth external finish of the arch.
Founded in 1954, T.Y. Lin International (www.tylin.com) is a globally recognized, full-service infrastructure consulting firm. With more than 1,000 engineers and planners throughout the United States and Asia, the San Francisco-based firm can deliver project-specific solutions to a variety of clients throughout the public and private sectors. Trade publication Engineering News-Record has included T.Y. Lin International in its annual lists of top bridge design, transportation design, and design firms.
BRIDGE SERVICES
Planning/Concepts
Design
Construction Engineering
Construction Support/Services
Program Management
Rehabilitation and Repair
Seismic Retrofit
Design/Build
Public-Private Partnerships (P3)
BRIDGE TYPES
Arch
Segmental
Suspension
Cable-stayed
Conventional
Pedestrian
Specialty
For more information about T.Y. Lin International bridge projects or to contact us, please visit our website at www.tylin.com, email [email protected], or call us at 415.291.3700.
Arch Bridges: Elegant Strength
T.Y. Lin International
Taiwan High Speed Rail, TaiwanFor this Build-Operate-Transfer mega-project, T.Y. Lin International performed the preliminary and final designs for 25 elevated bridges representing a total length of approximately 30 km. Undaunted by the project’s magnitude and complexity, engineers designed an energy-dissipating locking system to limit the bridge superstructure displacement to within five mm under train braking and acceleration forces.
Kanawha River Bridge, South Charleston, West VirginiaT.Y. Lin International embraced the opportunity to design an aesthetically pleasing bridge in the face of strict budget requirements. Engineers reduced costs by conducting a pre-construction drilled shaft load test for the foundations, and reduced maintenance by incorporating expansion joints only at the abutments, resulting in an economical design that also boasts the longest concrete box girder span in the U.S. at 760 feet.
Benicia-Martinez Bridge, CaliforniaT.Y. Lin International and a joint venture partner completed the final design and prepared plans and construction cost estimates for the segmental concrete box girder bridge, which serves as a seismic lifeline structure to the San Francisco Bay Area. Design innovations include the unique application of midspan hinges between the frames, atypical for a high-seismic zone but necessary to eliminate differential rotations due to heavy loads.
Jamuna Multipurpose Bridge, Sirajganj, BangladeshT.Y. Lin International prepared the winning pre-bid design for Hyundai Engineering and Construction as well as the final design, plans, and quantities for this Design-Build project. At a total length of 4.8 km, the world’s eleventh longest bridge was designed to withstand a maximum credible earthquake. T.Y. Lin International’s constructible design featured 3.15-m-diameter piles ensuring the structure’s stability against seasonal monsoons.
H-3 North Halawa Valley Viaduct, Oahu, HawaiiT.Y. Lin International provided complete design and construction support services for a pair of 6,000 ft twin curved viaducts built over seismically active and environmentally sensitive terrain. Engineers used 2,000 ft frames to minimize the number of expansion joints, reducing both maintenance and life cycle costs.
San Francisco-Oakland Bay Bridge East Span Skyway, CaliforniaT.Y. Lin International engineers faced the challenge of designing a viaduct with two parallel roadways, the components of which could be readily repaired and/or replaced in the event of a major earthquake of 7.2–8.0 magnitude. From the seismically resistant foundation to the highly ductile pre-cast deck segments, each component was tested for performance and post-earthquake repairability, a practice not commonly used by engineers—until now.
With today’s increasing demand for reliable and economical infrastructure, T.Y. Lin International understands the value of combining advanced design methods with practical construction knowledge to develop cost-effective, aesthetic structures for our clients. The well-rounded expertise of our engineering team allows us to apply innovative solutions throughout the design and construction process, and the results speak for themselves—award-winning projects delivered to satisfied clients.
Nowhere is this ingenuity more evident than in the design and construction of the new San Francisco-Oakland Bay Bridge East Span Skyway. The structure’s pre-cast girder segments are thought to be the largest ever built, with spans weighing as much as 800 tons. In addition to setting the record books, T.Y. Lin International engineers kept an eye on costs, utilizing the balanced-cantilever method of construction to erect the segments. The 525 ft long spans reduced the number of piers and minimized the cost of the deep foundations.
Our flexibility, creativity, and knowledge gained from years of experience in the field embody the innovative spirit that has always made T.Y. Lin International a pioneer in the advancement of bridge engineering.
Pioneering Design and
Construction Methods
Shibanpo Bridge, Chongqing, ChinaNow the longest concrete box girder bridge in the world, the 330 m main-span Shibanpo Bridge connects Chongqing’s business district to the southern district over the Yangtze River. In order to accommodate ship traffic, T.Y. Lin International engineers designed a unique 103 m steel box section to extend the main span of the bridge. This innovative solution made the best use of available materials, kept the project on schedule, and made the structure economically efficient.
Segmental Bridges: Innovation at Work
T.Y. Lin International
Founded in 1954, T.Y. Lin International (www.tylin.com) is a globally recognized, full-service infrastructure consulting firm. With more than 1,000 engineers and planners throughout the United States and Asia, the San Francisco-based firm can deliver project-specific solutions to a variety of clients throughout the public and private sectors. Trade publication Engineering News-Record has included T.Y. Lin International in its annual lists of top bridge design, transportation design, and design firms.
BRIDGE SERVICES
Planning/Concepts
Design
Construction Engineering
Construction Support/Services
Program Management
Rehabilitation and Repair
Seismic Retrofit
Design/Build
Public-Private Partnerships (P3)
BRIDGE TYPES
Arch
Segmental
Suspension
Cable-stayed
Conventional
Pedestrian
Specialty
For more information about T.Y. Lin International bridge projects or to contact us, please visit our website at www.tylin.com, email [email protected], or call us at 415.291.3700.
I-4/Lake Ivanhoe Pedestrian Bridge, Orlando, FloridaThis modern bridge provides connectivity within Orlando’s Urban Trail System, marking the entrance/exit of downtown Orlando. After extensive coordination with a design review committee comprised of State DOT officials and the greater Orlando community, TYLI developed an arch configuration that promises residents an iconic, bicycle and pedestrian-friendly structure.
Diamondback Bicycle/Pedestrian Bridge, Tucson, ArizonaIn 1997, a local Tucson artist was selected by the client and a local arts council for the idea of designing a bridge shaped like a snake. This award-winning bridge integrates post-tensioning applications with classical construction methods to imitate the features of a Diamondback rattlesnake. Using a creative combination of metal fencing, a diamond-shaped steel tubing configuration, and a tub-shaped box girder, TYLI’s signature bridge embraced the practice of functional art.
The Bridges at Rancho Santa Fe, Rancho Santa Fe, CaliforniaUsing an innovative stressed-ribbon design that takes maximum advantage of modern prestressing steel, these surprisingly rigid bridges span 80-foot-deep, 300-foot-wide canyons with no intermediate supports. The stressed-ribbon method does away with tall piers, falsework, and associated environmental impacts by making use of the near-surface bedrock at each edge of the canyon.
Lake Hodges Bicycle and Pedestrian Bridge, San Diego, CaliforniaTYLI provided concept studies, detailed design, and resident engineering and inspection services during construction for what is the world’s longest stressed-ribbon bridge, the approximately 1,000-foot crossing of Lake Hodges. With three spans of 330 feet and a depth of only 16 inches, the depth to span ratio is an amazing 1 to 248, enabling the dramatic crossing to “float” across the lake.
Blue Heron Pedestrian Bridge, Newton and Watertown, MassachusettsAesthetics played a key role in determining the final design for this 140-foot-long painted and galvanized steel-tilted tied arch bridge that links two Massachusetts communities. A highly visible centerpiece, the Blue Heron Bridge befits its rustic surroundings, accommodating joggers and cyclists.
Cedar Avenue Bridge, Flagstaff, ArizonaWith its dramatic backdrop of Flagstaff’s San Francisco Peaks, this impressive arch links the Flagstaff Urban Trail System and the Arizona Trail System, providing a safe crossing for hikers and cyclists over busy Cedar Avenue. The design of this variable-depth, post-tensioned box girder utilized 5000-psi concrete, resulting in a very thin structure at the center span. Crossing over the bridge and passing underneath the 138-foot single span imparts an open, airy feeling for both pedestrians and drivers.
Historically, pedestrian bridge designs have met the critical need
for safety in areas where transportation networks typically favored
motorized versus non-motorized modes of travel. However, many of
today’s crossings satisfy practical requirements such as pedestrian
safety while still addressing equally pressing issues such as creating
more livable urban environments. No longer just about getting people
from point to point on foot, pedestrian bridges generate community
pride and serve as landmarks in their own right.
T.Y. Lin International (TYLI) has been at the forefront of footbridge
bridge design for decades. Our designs are a collaboration between
the engineer and the community, culminating in definitive and
oftentimes artful structures that serve a plethora of uses. Whether
it’s a destination bridge or a bridge that enhances its natural
surroundings, TYLI skillfully designs footbridges for every purpose.
The Art of Footbridge
Design Harbor Drive Pedestrian Bridge, San Diego, CaliforniaLocated adjacent to the San Diego Convention Center, the Harbor Drive Pedestrian Bridge is a graceful single-cable, self-anchored suspension bridge with a single inclined pylon and a curved deck suspended only along its inside edge. Due to its prominent location and unique appearance, the bridge will serve as a southern gateway to downtown San Diego.
Founded in 1954, T.Y. Lin International (www.tylin.com) is a globally recognized, full-service infrastructure consulting firm. With more than 1,000 engineers and planners throughout the United States and Asia, the San Francisco-based firm can deliver project-specific solutions to a variety of clients throughout the public and private sectors. Trade publication Engineering News-Record has included T.Y. Lin International in its annual lists of top bridge design, transportation design, and design firms.
BRIDGE SERVICES
Planning/Concepts
Design
Construction Engineering
Construction Support/Services
Program Management
Rehabilitation and Repair
Seismic Retrofit
Design/Build
Public-Private Partnerships (P3)
BRIDGE TYPES
Arch
Segmental
Suspension
Cable-stayed
Conventional
Pedestrian
Extradosed
Stressed Ribbon
Specialty
For more information about T.Y. Lin International bridge projects or to contact us, please visit our website at www.tylin.com, email [email protected], or call us at 415.291.3700.
Pedestrian Bridges: Blending Form
and Function
T.Y. Lin International
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