Komarom Bridge, Hungary


The cable-stayed bridge over Danube river will be located at Komárom between Hungary and Slovakia.

The superstructure is a 5-span continuous stiffening girder suspended with two planes of cables on the pylon. The stiffening girder has an open cross section consisting of two sidal main beams and an orthotropic steel deck. The pylon is asymmetric in transversal direction. The steel structure of the pylon is filled with concrete in the bottom part. The bridge deck is straight in plan and curved (R=15000 m) vertically.


Bridge Type: 600 m long one-pylon cable-stayed road bridge, with a main span of 252 m. Orthotropic steel deck and asymmetric steel pylon.

Erection method: The side spans are incrementally launched on auxiliary supports, the main span is erected with the free cantilever method.

Scope of Work: Consultation during the static analysis and erection control process.

Project Partner: Pont-TERV Engineering Consultants Ltd, Budapest, Hungary


The European highway E75 with a total length of 570 km leads from the Baltic coast in the north to the Czech border in the south. The Polish part of the «Autostrade A1», between Gdansk and Torun has been realized and is operated privately within the framework of a BOT project. Near the city Grudziadz the A1 highway is crossing the river Vistula with a cantilevered, structurally demanding bridge. The main span of the bridge is 180 m and the superstructure
of the 400 m long free cantilever bridge was built by 8 cantilever forming traveler at the same time.

Span lengths:
110 – 180 – 110 m, Width of the bridge: 2 x 17.35 m

Detail design: 2008 – 2011, Construction: 2010 – 2011

Bridge Type: Three span pre-stressed concrete bridge over Vistula River with a total length of 400 m. The main girder is a single hollow-box with variable height between 4 and 10.5 m. Maximum cantilever during construction reached up to 94 m.

Erection method: Free balanced cantilever.

Scope of work: Modelling, static analysis, optimization of tendon scheme, reinforcement design and pre-camber calculation.


Grudziadz Bridge
Grudziadz Bridge
Grudziadz Bridge
Sandomierz Bridge
Sandomierz Bridge


Near the town of Sandomierz in the South of Poland an old steel bridge crossed the Vistula river. To increase the traffic capacity, the new prestressed concrete bridge became the goal of a «Design and Built» – competition. The «form» as well the pier locations with relative large final spans were kept from the old, existing steel bridge. The main spans were created by the cantilever method and the rest of 16 m at the last span by conventional scaffolding. The cross-section high above the pier is 5.60 m (h / l = 1:17) resp. 3.00 m (h / l = 1: 31.50) in the middle of the span.

Span lengths:
84.80 – 95.40 – 95.40 – 95.40 – 84.80; Width of the bridge: 14.10 m

Design: 2008 – 2010, Construction: 2009 – 2010

Bridge Type: Five span pre-stressed concrete bridge with single-cell hollow box girder. Total length of the bridge is 456 m.

Erection method: Free balanced cantilever.

Scope of work: Modelling, construction stage analysis, optimization of tendon scheme, stability, reinforcement design, pre-camber calculation and erection control.between 4 and 10.5 m. Maximum cantilever during construction reached up to 94 m.



The bridge is part of the Highway between Benguela and Lobito and it crosses the Catumbela River, approximately 7 km north from the Atlantic coast of Angola.

Bridge type: The bridge across the Catumbela river is a full suspension cable stayed bridge with a semi-fan arrangement of stays. The main span of the bridge is 160m long and the two side spans are both 64m long. The approach viaducts have multiple 30m spans. Together with the approach viaducts, this bridge forms a 438m long, totally continuous structure with only two expansion joints located at the abutments.

The concrete pylons are “U” shaped and approximately 50m high. The foundation soils are composed of alluvial deposits of loamy sand and clay with variable thickness, up to a depth of 45m over limestone bedrock. The foundation piles have a diameter of 1.20m.

The 24.50m maximum width deck is a two hollow-beam prestressed concrete girder. The two beams are connected transversely by the reinforced concrete top slab and by prestressed cross-beams placed every 4m.

The stays are arranged in two planes and are constituted by bundles of individual prestressed steel strands. They connect to the pylons crossing them through saddles, with the exception of the first three stays where traditional anchorages are used. The deck anchorages are positioned at 8m intervals except for the four backstay cables which are spaced at 4m.

Erection method: The structure was entirely cast “in situ”. The construction of the bridge began in July 2007 and was concluded in July 2009.

Project partner: ARMANDO RITO ENGENHARIA, Portugal; Bridge Designer; received the SECIL Engineering Prize 2011 for this bridge project

4th of April bridge
4th april bridge


Contreras Bridge is a high-speed railway bridge (design speed of 350 km/h) constructed over Contreras Reservoir in Villagordo del Cabriel, Valencia, Spain. It is the longest railway concrete arch bridge in Europe.

Bridge type: Over the reservoir the concrete pre-stressed deck is supported by a curved arch of 261 m.

Erection method: The arch has been built by cantilever construction supported on temporary stays. It was completed in December 2009

Scope of work: Assistance in modelling, cable tensioning optimization, dynamic calculation for HSR (design speed 350 km/h).

Project partner: EIPSA, S.A. (now SENER), Spain


Hardanger Bridge is crossing the Hardangerfjord in southwestern Norway. It is one of the longest suspension bridges in the world.

Bridge type: Suspension bridge with a total length of 1380 meters, with a main span of 1310 meters. The small difference between length and span is because the fjord quickly becomes very deep, and the pylons must stand near the shore. The steel deck is 20 m wide and includes a lane for pedestrians and bicycles. The clearance is 55 m and the pylons reach 200 m above sea level. The concrete pylons reach 200 m above sea level.

Project partners: TDA – COWI, Statens Vegvesen, Norway

Bjornafjorden floating bridge


This project is a feasibility study on a new bridge concept which is being investigated for crossing the 5 km wide Bjørnafjord on the west coast of Norway.

Bridge type: 3-span suspension bridge, supported by two tension leg moored floaters midfjord and two bottom-fixed traditional concrete pylons near shore. The three main spans of the bridge have a length of 1385 m each. The north approach bridge has a length of approximately 600 m from the concrete pylon to the S-point in the spread saddle.

Scope of work: Software development of hydrodynamic & wind capabilities and interaction of both in time domain; assistance in modelling, testing of dynamic calculation.

Project partners: TDA – COWI, Statens Vegvesen, Norway


Sheik Zayed Bridge is a spectacular and iconic crossing and the main gateway crossing to Abu Dhabi Island. The primary aim was to provide a monumental landmark that will leave a legacy for the city of Abu Dhabi in the United Arab Emirates (UAE). To achieve such a legacy, the award-winning architect Zaha Hadid was commissioned to produce the structural shape that symbolizes the desert dune hills of the UAE. The highly irregular nature and varying shape of the structure posed many engineering challenges. The structure twists and element sizes vary in three dimensions, with few surfaces being truly horizontal or vertical.

Bridge type: Complex three-span concrete arch bridge with suspended deck and steel arches with total length of 842 m and longest span of 140 m.

Scope of work: Software support/development and assistance in modelling, structural analysis and design.

Project partner: High-Point Rendel (now Rendel Limited), UK; Structural designer, supervisor of construction



Bridge type: Composite cable-stayed bridge is a six- span, continuous superstructure with an overall length of 929 meters, with a main span of 376 m and deck width of 45 m. Steel main girder in the main span and prestressed continuous concrete girder in back span. The main support system is a single pylon with asymmetric cable-stayed structure. The pylon is 200 meters high.

Erection method: Incremental Launching Method; Segmental, balanced cantilever construction.

Scope of work: Assistance in performing the full bridge modelling, stage analysis, optimization of cable-stays stressing, structural analysis.

Project partner: VCE Consult, Vienna, Austria; Bridge Designer

During their employment in various companies our colleagues were working as project engineers or consultants/technical supporters/software  supporters on the projects mentioned above.