lin international type private industry civil and structural engineering founded june 1 1954 headquarters san francisco california key people alvaro piedrahita p.e. president man chung tang dr. p.e. chairman of the board website official website t. y. lin international tyli is a global multi disciplinary infrastructure services firm . headquartered in san francisco tyli established its business in the design of long span bridges and specialty structures . the firm provides a range of planning design construction and project management services to the aviation ; bridge ; facilities ; mobility planning and management ; ports and marine ; rail and transit ; and surface transportation industries . tyli operates from more than 50 regional centers across four continents and employs a professional staff of more than 2 500 engineers planners architects and scientists . 1 contents 1 history 2 services 3 industries 4 projects 5 see also 6 references 7 external links history edit 1950s tyli was founded on june 1 1954 by tung yen lin a chinese american structural engineer recognized worldwide as an innovator in bridge design engineering and construction . lin is credited with standardizing the practical use of prestressed concrete . he is also known for his emphasis on the structural aesthetics aspect of engineering regardless of a project s economic limitations . 2 3 1960s 1970s lin continued to expand his firm s specialty in prestressed concrete to broader consulting services with projects that included conventionally reinforced concrete structural steel masonry and timber framed structures . in 1967 he designed the 18 story shear wall bank of america building in managua nicaragua . the reinforced concrete tower was one of only two structures left standing after the country s 1972 earthquake . 4 lin also became known for his design innovations such as the rio colorado bridge an upside down suspension bridge spanning a deep gorge in costa rica . 5 in the early 70s the firm also established offices in taiwan and singapore . 1980s tyli expanded with new offices in kuala lumpur and a merger with maine based hunter bellow associates in the u.s. in 1986 when u.s. president ronald reagan presented lin with the national medal of science he responded by handing the former president a detailed plan for a 50 mile long intercontinental peace bridge connecting alaska and siberia across the bering strait . 6 in 1989 tyli was acquired by the dar group an international network of professional service firms located in 45 countries . 1990s following the loma prieta earthquake in california in late 1989 tyli helped in the development of advanced techniques engineering tools and design standards for bridge assessment the seismic retrofit of existing structures 7 and the design of new bridges . 8 the firm also completed several acquisitions including california based mcdaniel engineering chicago based bascor washington state s dges consulting engineering and new york s drc consultants . additionally the firm opened a new asia pacific office in chongqing china . 2000s u.s. expansion continued with the acquisition of miami based h.j. ross associates inc. northern california s ccs planning and engineering multi location fra engineering and architecture and medina consultants on the east coast . the acquisitions strengthened the firm s services in the areas of its traffic engineering and transportation engineering through its aviation and rail and transit line of businesses for such projects as miami international airport s expansion project . 9 in asia tyli oversaw the design of major bridges in china s fast growing central region 10 including the shibanpo bridge and the caiyunba bridge in chongqing and the second wujiang bridge in fulin . 11 2010s tyli oversaw the design of 25 elevated bridges across taiwan for the island s new high speed rail system and the hoover dam bypass bridge which is downstream of the hoover dam ; 12 the port mann bridge in british columbia canada 2012 ; 13 and the new eastern span of the san francisco oakland bay bridge 2013 . 14 15 services edit tyli provides services on all phases of project development and delivery including construction engineering construction support and inspection design design build intelligent transportation systems planning program management industries edit tyli provides services within all major sectors of the infrastructure industry including airports bridges buildings federal facilities land development ports & marine rail & transit roadway systems projects edit select project list arizona veterans memorial coliseum phoenix arizona arthur ravenel jr. bridge charleston south carolina caijia bridge chongqing china caiyuanba yangtze river bridge 16 chongqing china california high speed rail central valley line new champlain bridge 17 montreal canada cinta costera 3 panama city panama chicago transit authority cta red line modernization chicago illinois eller drive and intermodal container transfer facility ictf overpass 18 broward county florida fourth bridge over the panama canal 19 panama city panama kenneth f. burns memorial bridge 20 lake quinsigamond central massachusetts miami international airport 21 miami florida mike o callaghan pat tillman memorial bridge hoover dam bypass bridge arizona nevada puente centenario panama canal republic of panama rex t. barber veterans memorial bridge jefferson county oregon san francisco oakland bay bridge oakland california sidney lanier bridge brunswick georgia taiwan taoyuan international airport 22 taipei taiwan the esplanade theatres on the bay singapore tilikum crossing bridge of the people portland oregon victoria theatre and concert hall singapore wacker drive reconstruction 23 chicago illinois see also edit architecture portal business and economics portal engineering portal science portal references edit t.y. lin international website . king john 18 november 2003 . tung yen lin 1912 2003 an . san francisco chronicle . destefano jim december 2003 . t.y. lin 1911 2003 pdf . structure magazine . swent eleanor 2011 . the father of prestressed concrete oral history transcript by t.y. lin and eleanor swent . biblio balthazar . pp. 204 207 . rio colorado bridge . highestbridges.com . woo elaine 11 november 2003 . tung yen lin 91 ; engineer advocated a novel way to build . los angeles times . charles seim ; santiago rodriguez 1994 . golden gate seismic retrofit project a reference for approaching the seismic aspects of the golden gate bridge pdf . earthquake engineering tenth world conference . east span news . san francisco oakland bay bridge east span seismic safety project . airport master plan & capital improvement project . miami international airport . retrieved 12 march 2014 . tang man chung 9 september 2014 . international bridges long standing . roads & bridges . retrieved may 18 2015 . cho aileen 2 october 2006 . china s great expansion fuels boom in high profile designs . engineering news record . goodyear david october 2012 . mike o callaghan pat tillman memorial bridge . structure magazine . fehr bradley 20 february 2010 . new port mann bridge to be widest in canada . journal of commerce . newcomb tim 28 august 2013 . how they built the record setting new bay bridge span . popular mechanics . under construction engineering the bay bridge . uc berkeley college of engineering . retrieved 12 march 2014 . xueshan liu anshuang liu ; shanping wei zhong yang 2010 . construction of the main span s of the chongqing caiyuanba yangtze river bridge pdf . arch bridges.com . arch bridges.com . retrieved 17 may 2015 . cs1 maint multiple names authors list link new champlain bridge corridor project canada . roadtraffic technology.com . roadtraffic technology.com . retrieved 19 may 2016 . unreliable source port everglades expansion eller drive overpass . porteverglades.net . tylin international wins tender for construction of the fourth bridge 29 january 2016 economy . la estrella de panama . 29 january 2016 . retrieved 19 may 2016 . new kenneth f. burns memorial bridge project . massdot project kenneth f burns memorial bridge . fining brittany winter 2011 . gold award winner miami international airport s north terminal pdf . owners perspective magazine . retrieved 15 may 2015 . bates 10 october 2013 joe . project watch taiwan taoyuan international airport . airport world magazine . retrieved 29 april 2015 . morcos 2 august 2010 johnny . city streets a second wind . roads & bridges . retrieved 29 april 2015 . external links edit official website retrieved from https en.wikipedia.org w index.php title t. y. lin international & oldid 743700187 categories companies based in san franciscohidden categories cs1 maint multiple names authors listall articles lacking reliable referencesarticles lacking reliable references from june 2016use mdy dates from january 2016 navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages add links this page was last modified on 10 october 2016 at 19 47 . text is available under the creative commons attribution sharealike license ; 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