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aybetlogoThe company is established in 1993 to meet prefabricated canalette, culvert, concrete pipe, border, sloping elements, grid tiles and fence posts requirements of Aydiner Inc. company required for Construction of Bafra Plain Left-Side Coastal Irrigation Installations and then its infrastructure is finished in 1997 and Prefabricated Industrial Construction Elements company commenced its prestressed bridge beam manufacturing activities as of 1998. It became an integrated concrete plant offering innovative solutions to its clients thanks to a concrete prefabricate production plant installed on 110 d land area having a plant area with 28.000 m2 indoor and 100.000 m3/year prefabricate and 500.000 m3/year plant-mixed concrete production capacity, located at Samsun – Ankara highway 14th km. near Eski Tekel Tutun Depoları, Ahullu village, which was commissioned as installed on 800.000 m2 land area as to have 22.000 m2 indoor which we have completed its construction in 2010 in Bafra. In our plant; – Plant-mixed concrete – Prefabricated Large-clearance Industrial plants and multi-story buildings – Depots and warehouses – Multi-story parking lots – Gymnasiums – Schools – Market places – Pre-stressed Bridge and viaduct beams – Steam-cured Culverts with various dimensions from 1×1 up to 3×3 with integrated sealing Concrete and ferroconcrete pipes within 150 to 2400 mm diameters, Inspection and parcel funnel kits, etc – Interlocking concrete pavers, grass tiles and rain gutter, – Various types of concrete border tiles – Highways gradient gutters, fence posts, triangulation, frontier and polygon tiles – Highways new-jersey type central, side and end barrier elements, etc products manufacturing activities are performed including their transportation and installation. chodai_logo In 1968, “Long Span Bridge Design Center”, the predecessor of CHODAI Co., Ltd., was established by 13 engineers, aiming to be one of the top consulting firms in bridge engineering, giving its first priority to technological capability. In 1970, CHODAI was awarded its first big project, Great Seto Bridge. Since that project, CHODAI has been participating in lots of long span bridge projects (in planning, design, construction supervision, construction management, rehabilitation and maintenance) with the latest technologies, and pioneering new fields such as BMS (Bridge Management System) etc. CHODAI remains as one of premier bridge engineering firms, with remarkable records of long span bridges worldwide. Major achievements in long span bridges:  *Linked to Wikipedia

While diversifying its activities, CHODAI has expanded its field of services out of structural engineering to urban planning, transportation planning, environmental / social consideration, water supply & sewage, ITS and computer systems. csi_logo Founded in 1975, Computers and Structures, Inc. (CSI) is recognized globally as the pioneering leader in software tools for structural and earthquake engineering. Software from CSI is used by thousands of engineering firms in over 160 countries for the design of major projects, including the Taipei 101 Tower in Taiwan, One World Trade Center in New York, the 2008 Olympics Birds Nest Stadium in Beijing and the cable-stayed Centenario Bridge over the Panama Canal. CSI’s software is backed by more than three decades of research and development, making it the trusted choice of sophisticated design professionals everywhere.
doka_logo Doka. The Formwork Experts. The Doka Group is a company of the Umdasch Group, established in 1868 and family-owned ever since. With over 140 years’ experience of woodworking and many decades’ metalworking and plastics-processing know-how, Doka is one of the world’s leading suppliers of formwork solutions. Our more than 6000-strong workforce provides Doka customers with high-performing products, systems and services. The aim: to build faster, more safely and more efficiently. Doka formwork solutions are in demand all over the world. More than 160 sales and logistics locations in over 70 countries deliver products and services. This is why Doka customers can be sure of getting the formwork they need, in the right quantities and at the right time, anytime and anywhere. Doka Turkiye is located in Gebze – Kocaeli. Company is established in Turkiye in year 1999.
Doka Turkiye is a hub for management of businesses in Turkey, Azerbaijan, Turkmenistan and Iraq.

Currently Doka is leading position in its sector.  Doka offers formwork solutions for all areas of construction activity – for anything from housing developments to transportation infrastructure and power-generation facilities


Founded in 1988, with the consortium of Freyssinet a company of Vinci group with Yapı Merkezi, is the leading company of Turkey, regarding to modern structure applications and manufacturing high-tech structure solution. Continuing the activities of Freyssinet in Turkey and contiguous countries, Freysaş provides the junction point of structure and technology as its vision.With the incomparable expertise and know-how on post tensioning applications, Freysaş works in areas covering bridges, cylindrical structures, large surface areas, seismic protection, and structure parts manufacturing. Thanks to its technical background which supports Freysaş in the contemporary conditions where design is as much important as function, Freysaş has the ability to provide high-tech solutions for imaginative structures. As the frontier of stay cable bridge applications in Turkey, Freysaş built its first stay cable bridge project in 1997 at İzmir. Since then, Freysaş built many more projects both in Turkey and contiguous countries, becoming the one leading subsidiaries of owner companies. Simultaneously, the Metro crossing bridge over the Golden Horn was completed in 2013. The Golden Metro Crossing Bridge was built with the know-how of Freysaş, supported with its technological background and completed in a very short time period. The Liakhvi Viaduct in Georgia was completed in 2012. With its length over 850 meters it covers a large area beneath, including a railroad, a highway and a river, it would have caused a serious logistics problem if it wasn’t build with launching technology of Freysaş. With this technology, except the duration in which the columns were built, all the activity beneath was not interrupted. This method, with the capacity of 40 meters will be the most popular bridge construction method in Turkey very soon.


Established through a partnership between IC İçtaş Construction Co. (which is an engine company of IC İbrahim Çeçen Investment Holding and has enjoyed great success on international platforms) and Astaldi, ICA has completed many projects including the expansion of the Pulkova Airport in St. Petersburg as well as the currently on-going 3rd Bosphorus Bridge and Northern Marmara Highway Projects, which are both among the most important projects in Turkey.

As an engine company of IC İbrahim Çeçen Investment Holding, IC İçtaş Construction is a global brand widely  preferred in Turkey and abroad for undertaking macro scale projects thanks to its over 40 years of experience and know-how. Since the day it was established, IC İçtaş Construction has undertaken many successful projects so far including construction of airports, ports, marinas, high speed train, road and bridge construction, high capacity power plants, smart buildings, business centres, watering systems, public sector buildings, mass housing sites, health facilities, universities and schools.

Apart from construction projects, IC İçtaş Construction successfully operates airports, sea ports and marinas too. IC İçtaş Construction has proved itself as a reliable business partner widely preferred by the leading global companies and ranked 168th and 129th respectively on the largest international contractors list filed by the Engineering News Record (ENR).

IC İçtaş Construction is also an influential actor for production and distribution in the energy sector.

As for Astaldi, one of the most successful construction companies in Italy and the world, the company stands out for the transportation, energy, civil and industrial structure and infrastructure projects it has undertaken. Apart from Turkey, the company has a strong position in especially Venezuelan, Polish, Romanian, Italian, Chilean and Algerian markets while operating in 25 countries in total. The company is active in land road, railway, subway and energy power plant construction operations in those countries.

IC İÇTAŞ – Astaldi Consortium ICA received the Best Public-Private Sector Partnership Model Project Funding Award 2013 in the EMEA region for the 3rd Bosphorus Bridge and Northern Marmara Highway Project from the leading global finance magazine EMEA Finance, published in Europe, the Middle East and Africa.

larsa_logo_2 LARSA 4D BRIDGE software developed by New York-based LARSA has become the standard for bridge design and construction analysis at leading U.S. firms during the past decade. LARSA 4D analysis and design software, which addresses the specialized needs of cable-stayed, curved-girder, segmental, suspension, and other bridge forms, provides advantages in process efficiency and quality which saves time and delivers value. At the core of LARSA 4D is a staged construction analysis, which models changes to a structure over time using construction activities and time-dependent material effects, such as creep, shrinkage, and relaxation. Additionally, following our mission to lead innovation in 3D finite element analysis software, LARSA 4D’s new Steel Bridge Module allows our users to optimize design for safer bridges by saving time and reducing cost through the use of a single software that combines refined analysis and detailed code check. In LARSA 4D innovation in engineering software pertains not only to analysis and design, but also to client support. To accommodate the unique and changing needs of today’s bridge engineers, LARSA 4D’s “Features on Demand” tool allows LARSA’s support team to deliver custom features and updates quickly in response to our clients’ technical needs.

Otoyol TR logo

Gebze – Orhangazi – İzmir Motorway (including İzmit Bay Crossing Bridge and Connection Roads) Build – Operate – Transfer Project is 433 km long in total together with 384 km motorway and 49 km connection roads.Following conclusion of the tender on April 9th, 2009, the project of Gebze-Orhangazi-İzmir Motorway has been awarded to Nurol-Özaltın-Makyol-Astaldi-Yüksel-Göçay Group as their offer for 22 years 4 months (building and operation)has been determined to be the best offer.
Otoyol Yatırım ve İşletme A.Ş. was established who have been awardedthe tender with the aim of providing the finance and realizing the design,construction, maintenance, repair, operation and transfer of the Motorway Project as a Build-Operate-Transfer Model. The Contract has been signed on September 27th, 2010 between Otoyol A.Ş. and General Directorate of Highways. The groundbreaking ceremony for starting of construction works was held on October 28th, 2010.
Project construction cost based on unit price in 2009 is 6.3 billion $, it currently reaches 7.0 billion $ including the finance costs.
Of the envisaged 7.0 billion USD Total Investment Cost, 3.4 billion USD has been secured (from Gebze to Bursa Intersection including the İzmit Bay Bridge) via a 2.0 billion USD loan provided by 8 Turkish Banks:
• Akbank, Finansbank, Ziraat Bankası, Garanti Bankası, Halk Bankası, İş Bankası, Vakıflar Bankası, Yapı ve Kredi Bankası
The Project has a budget over the sum of the national budgets of 50 countries and also, it is one of the largest projects to be carried out with the Build – Operate –Transfer model in the World.
Technical features include:
• 1 Approximately 3 km long suspension bridge (Izmit Bay Crossing Bridge)
• Total Motorway Length 433 km (including connection roads)
• 35 Viaducts, 19,861 m in total length (1 Steel Viaduct, Approximately 1,400 m)
• 3 Tunnels, 6,360 m in total length
• 185 Bridges
• 4 Motorway maintenance operating centers
• 2 Tunnel maintenance operating centers
• 17 Service areas
• 22 Intersections




TTS International Engineering and Architecture was founded in Istanbul by young and entrepreneurial engineers devoted to the development of its country and the world at large.At TTS, we strive to deliver economical, functional, practical and innovative designs. We see our designs through our client’s eyes and we consider every detail with a focus on their needs.We understand that our success is only possible through the combination of our team expertise. This is why we value education and collaboration above all and constantly seek opportunities to expand our knowledge.
• Highway and railway engineering
• Bridges, viaducts and civil structures
• Retrofit projects
• Tunnel, gallery and shaft projects
• Geotechnical and engineering geology projects
• Deep excavation and shoring projects
• Earthquake resistant design services
• Soil investigation

We consider our highway design group a core part of our team. Our engineers has wide experience developing highways and interchanges. We consider our designs at all scales; from pedestrians movement to urban interaction and overall plan of the entire highway.

Our civil engineering team are experts in bridge design. We utilize state of the art construction techniques in out designs. Our engineering team have a wide array of expertise in both the design and retrofit of steel, concrete and composite bridges.

Our multi-disciplinary geotechnical group provides our clients with economical and practical solutions. Our experience and expertise results in foreseeing and mitigating risks in all ground conditions. We provide design services for soil retaining structures, structural foundations and tunnels.


Wowjoint, naming from a philosophy words jointed “Willing, Objectiveness and Winning”. was created in 1996 by the experienced engineers with strong background on railway field specially on researching and operating locomotives for 15 years. Now Wowjoint Holdings Ltd. is a public company in USA and is becoming a leader and innovator involved in customized heavy duty lifting and carrying machinery for heavy and bulky loads used in such large scale infrastructure projects as railway, highway, bridge construction and so on.

With the experience gained on the fields, it is not only a supplier on customized products based on its research, design, manufacturing, commissioning and after sale services, but also a contractor of equipment rental service, project consultancy and construction of subcontracting in the fields.

Grown internationally, Wowjoint currently employs highly trained engineers, designer and technicians as well as skillful staffs who are working mainly in three countries, China, USA and Italy. Thanks to the continuous effort of founders and staffs, Wowjoint has been satisfying all the clients with high quality equipment, technical supports and services, under handling all aspects of product design, manufacturing and sales.

It deserved to mention that all quality control and design are done according to the latest European standards and ISO9001:2008, ISO14004:2004, OHSAS18001:2007. 

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