Strukturas News

Strukturas Overhead MSS for Bridge SO 203

SO 203 Motorway bridge over Malši

800 m bridge was designed as a flyover with 19 spans.
It contains 2 parallel decks with the width of 14,4m.
The height of the bridge above the ground is 10 m at its highest point.

Strukturas Overhead MSS named SO 203 was used for construction of long deck of the bridge project D3 in the Czech Republic, close to Ceske Budejovice.

Highlights & Facts:

Max Span: 42,0m
Max MSS Span: 35m
Weight of Superstructure: Approx 28,6t/m
Width Of Bridge Slab: 14,4m
Min.Hor.Radius: R= 2700m
Max Crossfall: 2,5%
Max Long Slope: 0,7%
Deflection of MSS: MAX L/400

Client: Doprastav, a.s.

The Movable Scaffolding System was designed as an overhead type with two main I beams. Opening of the formwork and launching the MSS is was ensured by hydraulic cylinders.
The entire steel structure weighing 525 tons was manufactured in China, in a certified factory, and was transported to the construction site in 12 meter containers.
The complete production of the MSS took three months, and its subsequent transport across half the globe took about five weeks.
Assembly took place completely directly on the construction site using 30,000 high-strength bolts.
Typical span by span concreting cycle of 42 m length bridge spans takes 14 days.

The story of legendary MSS Drammensvogna

The story of legendary MSS Drammensvogna – 50 years in action

Last week we signed one more MSS redesign contract with Skanska, who owns legendary MSS Drammensvogna.

This time it shall be used at bridge Vadløkkjbrua on the E6 south of Trondheim, Norway.

Vadløkkjbrua will be the 19th project made with this MSS!

MSS Drammensvogna, one of the first MSS was builded in 1973 for Norway the motorway bridge in Drammen, Norway.

The E18 motorway bridge in Drammen is a four-lane girder bridge on the E-18 that crosses the outlet of the Drammen river between Brakerøya and Bangeløkka. The bridge has free spans of up to 60 meters and a sailing height of up to 12 metres.

Until now it is the longest bridge in Norway – 1,890 meters!

Revolutionary MSS technology has proven its productivity.

The contractor for the bridge was Ingeniør Thor Furuholmen A/S, one of the largest companies in Norway at the time. They later merged with Ing. F. Selmer A/S to Selmer – Furuholmen AS, which today is Skanska Norge AS.

In collaboration with the consulting company Taugbøl & Øverland A/S (now COWI), the MSS was designed and put into production.

Construction work began in the autumn of 1973. The span by span casting of the bridge deck was carried out with a newly developed type of MSS, 131 meters long (800 tonnes weight), which enabled full casting at a speed of up to 100 meters of bridge per 14 days. Bridge deck has been casted 4 weeks before end of construction schedule.

Since that time the MSS Drammensvogna has been redesigned for many bridge projects in Nordic countries as underslung and overhead MSS.

On the engineering side, competence on the equipment has been maintained internally at Skanska, and there has also been good cooperation with for the consulting with us – company Strukturas as.

All the projects accomplished with the Drammensvogna MSS:

1. E18 Drammen Drammensbrua 1973-75

2. E39 Kristiansand Gartnerløkka bridge 1978

3. Stockholm Johanneshov Bridge 1981-83

4. Strømstad Skee bridge 1986

5. E6 Oslo Lodalen bridges 1986-87

6. Sweden Obbola bridge 1988-89

7. Molde Bolsøy Bridge 1990

8. Skien Menstad bridge 1990-91

9. Askøy Askøy Bridge 1990

10. Storeklubben, Askøy Storeklubben viaduct 1989

11. Troms Dyrøy Bridge 1994

12. Porsgrunn Frednesbrua 1994-95

13. Gardermobanen Mork/Nessa/Kvisldalen 1995-96

14. Sykkylkven Sykkylvsbrua 1999-2000

15. E18 Drammen Parallel motorway bridge 2003-2004

16. E16 Bagn Bagn bridge 2017

17. Nordøyvegen Lauke and Hamnaskjersund bridge 2020-21

18. E16 Bjørum-Skaret Isielva bridges 2022-24

19. Vadløkkjbrua on the E6 south of Trondheim 2024-25

Founder of Strukturas Tore Gjølme has followed this MSS since the beginning and will participate also at the 19th project for Drammensvogna.

He is 78 years old and still going strong!

Credits to Statens vegvesen – Norwegian Public Roads Administration

Link to article

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Underslung Form Traveller Ariari Puerto Lleras, Meta, Colombia

Underslung Form Traveller Ariari – Puerto Lleras, Meta, Colombia

Connecting the downtown area of Puerto Lleras with the existing Vista Hermosa county road, known as “Trocha Siete” with a bridge over the Ariari River.
It is a cable-stayed bridge with a length of 270 m, made up of spans of 70 m, 135 m and 70 m and a deck width of 11.6 m. Bridge supported by two pylons approximately 52 m high and 20 m wide at the base.
The superstructure is made up of a concrete slab that is supported on longitudinal and transverse by structural steel beams.
Balanced cantilever construction method of the deck – Cast-In-Situ with Form Travellers.

The Underslung Form Traveller solution can be adapted to different types of bridge decks, such as arch bridges and cable-stayed bridges, leaving enough room to assemble the temporary or final cable stays, and allowing easy launchback to the initial assembly position.
The external formwork of this type of Form Traveller is supported by the main structure, leaving enough room to install the pre-assembled rebar cage. When the rebar cage is pre-assembled, the Strukturas Underslung Form Traveller is the perfect choice.

Highlighs & Facts:

Segment Length: 7,75m
Length of Hammerhead: 19,9m
MAX Segment Weight: 132,7ton
MAX Width Superstructure: 12,8m
Min.Hor.Radius: R=1195m
Max Long Slope: 7,0%
Crossfall: 0%
Deflection of Main Beam: L/400
Critical Wind Speed During Launching: 20,0 m/sec
Critical Wind Speed During Concreting: 32,0 m/sec
Client: CONCREARMADO LTDA.
Project Location: Puerto Lleras, Meta, Colombia

STRUKTURAS
WE MAKE IT SIMPLE !

See the video below and do not hesitate if you wish to consult about your bridge!

TB Heubach Bridge demolition

Implenia, a leading construction services company, decided to use an Strukturas Movable Scaffolding System (MSS) Underslung for the demolition of existing concrete decks on the TB Heubach Bridge in Germany.

Moreover this same MSS is also used for the construction of the bridge’s new TT section decks.

The Heubach valley bridge consists of two parallel structures, which will be demolished and rebuilt in two construction phases.
Bridge info:
Year of construction of existing building: 1968
Length: 184 meters
Width: 16.5+16.5 meters
Bridge spans: 30,6 + 37,5 + 45 + 37,5 + 30,6 meters
Max. height above ground: 18 meters

Demolition of the old bridge and the construction of the new Heubach bridge was awarded by Die Autobahn GmbH des Bundes.

MSS at assembling final stage

Deck demolition

The Strukturas MSS solution is particularly innovative because it allows the conversion of the MSS formwork from a box section, which is used during the demolition phase, to a TT section, which is used during the construction of the new bridge decks. This approach saves time and resources, making the construction process more efficient.

The challenging conditions on the job site made the assembly of the MSS particularly demanding, and the Strukturas MSS assembly team had to plan and execute the operation to the best of their ability.

Movable Scaffolding System ensures the minimal intervention to existing infrastructure.
Using MSS for demolition allows the existing highway and the road bellow to remain open throughout most of the demolishing period.
The engineering challenge – to avoid an overload of the superstructure during the demolition and to ensure a safe load transfer within the load capacity of the MSS.

MSS general cross section view when used to demolish the existing concrete decks.

Highlights & Facts:
Max Span: 45,0m
Max MSS Span: 45,0m
Weight of the concrete bridge: Approx 250 KN/m
Width Of Bridge Slab: 16.5m
Min. Hor. Radius: R= 2500m
Max Crossfall: 2.1%
Max Long Slope: 0,63%
Deflection of MSS: MAX L/400

The demolition of old bridge structures with MSS is an effective and safe solution for many bridges.

See the video below and do not hesitate if you wish to consult about your bridge!

STRUKTURAS

WE MAKE IT SIMPLE!

Strukturas MSS approved as safe construction method to build bridge over the railway

The Bane NOR – Norwegian National Rail Administration has approved Strukturas MSS – Movable Scaffolding System as a safe construction method to build the bus road bridge over the railway line in Stavanger.

The joint venture of Risa AS and Contur AS, with COWI as adviser, won the competition to build the Bussveien through Jåttåvågen, between Vaulen and Gausel in Stavanger.

The implementation of Strukturas as overhead MSS allows the railway to remain open throughout most of the construction period.
There is thus no need for a separate safety culvert over the railway, and train traffic can run while the biggest part of the concrete works is in progress.
When a contractor has to cast concrete or launch the overhead MSS over the railway they have to do it while there is no train traffic.

But they can do this work either at night when there is no train traffic or in periods where Bane NOR has approved stoppages in train traffic over several days.
But most of the time concrete workers can work inside of the Strukturas as overhead MSS with ongoing traffic below.

If we had built in the usual way with traditional formwork, we would have had to secure the railway with a safety culvert and take additional safety measures to safeguard train traffic and other traffic under the bridge while the work is in progress, says Per Ove Stokkeland, project manager in Rogaland fylkeskommune .

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Special services for one of our first customers!

Our client, Mota-Engil, currently the largest Portuguese construction company present in various markets worldwide, has awarded Strukturas the redesign project of an Overhead MSS originally not provided by us and which had been stored for several years in their yard in Poland.

Strukturas’ redesign introduced significant modifications to the MSS, including a hinge joint between the main girder and the front nose, allowing it to be used on plan view curved decks, the addition of a rear concreting support, which allows for the transportation of pre-assembled U-shaped reinforcement using electrical winches, and the supply of a hydraulically operated internal formwork.

Mota-Engil transported the MSS from Poland to Portugal, where it is currently being used in the construction of railway viaducts. The rebuilt MSS steel structure was done in Portugal. Mota-Engil gave a special attention to pre-assembly and testing both at the workshop and at their central yard, due to the MSS being stored in Poland for several years.

Strukturas has been supplying various bridge building equipment, including Formtravellers FT and Movable Scaffolding Systems MSS, to Mota-Engil for around 30 years. Our the first supply was made in 1994 of an Underslung MSS to the company, that was then called Engil and later included in the Mota group, giving rise to the current Mota-Engil.

Krondorf Bridge demolition

The Strukturas rental Underslung MSS Randselva was dismantled autumn 2021 in Norway and sent directly to Germany for the demolition of the Krondorf Bridge on the A3 south of Nürnberg.

The northbound deck is being demolished as the traffic is running on the southbound deck. After domolished deck and new construction on the north bond deck, the Strukturas rental Underslung MSS will be used to demolish and build also the south bond deck.

Start MSS assembling

Deck demolition

MSS operation

World-leading bridge builders do also build factories

Herøya Industripark recently published an article about us:

Strukturas team moved from Langesund into the industrial environment at Herøya.

“We see a great drive in industry at Herøya. We want to be here because we can contribute, help build the new factories that are planned,” says Terje Johannessen, new head of industry and offshore at Strukturas.

Terje is back in Strukturas after five years in Bilfinger. Prior to that, he worked with steel structures in Strukturas for 22 years. Now he leads the company’s industrial venture after recently retired Paul Andersen.

Our team knowledge is in demand and it has turned into hundreds of giant steel and concrete bridges all over the world. Moreover we have also provided our services to Industry since 1991. Now we will also use the knowledge to help build factories.

“I have recently been involved in building a factory,” comments Terje. “Under the auspices of Bilfinger, I was the engineering manager for NEL Hydrogen. They have now built the world’s largest factory for the production of electrodes here at Herøya.”

He mentions several industrial projects he has been involved in in recent years, such as REO (Rare Earth Objects), Hydro’s new aluminum factory at Karmøy, conversion of test facilities for Yara in the research park and the Bamboo project.

“I hope that my experience is useful for developing the industrial part,” says Terje. “The job will be to bring in industrial projects where we can contribute on steel and concrete. We can take part in all construction projects, and we are particularly strong in steel. I know many people here in the environment, and I am very pleased that we have moved to Herøya. Now we will further develop and focus on expanding the industrial department.”

FT Sibiu: casting deck segments in Romania

In Talmaciu near the historic city of Sibiu two Strukturas FT pairs was delivered to Hünnebeck to concrete the central cantilever deck of a bridge integrated in the new highway under construction.

PORR România took one more engineering adventure, this time TEN-T Sibiu-Pitești Motorway in Romania.

Main activities:
🔸 Motorway with two lanes in each direction, hard surface width of 26m along the length of 13.170km
🔸Two road junctions: Sibiu and Boița
🔸Two service spaces of type S1 at km 8.200 left, km 8.200 right
🔸A maintenance and coordination centre in the area of the Boița road junction
🔸A viaduct with 10 spans at km 10.470, at a length of 414.70m
🔸A viaduct with 8 spans at km 12.375, at a length of 651.40m
🔸27 bridges and passages
🔸27 culverts

Two Strukturas as FT pairs was delivered to Hünnebeck by BrandSafway to concrete the central balanced cantilever deck of a bridge integrated in the new highway under construction.

Do you want to create something really great
Let’s talk about how Strukturas as can supply you bridge building technical solutions and equipment.

The bellow two YouTube videos shows

Huennebeck Project of the year 2021 video;
and an interesting time-lapse of an early project stage.

Strukturas Overhead MSS for Bridge SO 203

Highlights & Facts:

The story of legendary MSS Drammensvogna

Underslung Form Traveller Ariari Puerto Lleras, Meta, Colombia

TB Heubach Bridge demolition

Strukturas MSS approved as safe construction method to build bridge over the railway

Special services for one of our first customers!

Krondorf Bridge demolition

World-leading bridge builders do also build factories

FT Sibiu: casting deck segments in Romania

STRUKTURAS - WE MAKE IT SIMPLE !

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