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.

MSS SO 203 - 3D model picture
STRUKTURAS Overhead MSS SO 203 at concreting first span second deck of project D3 close to Ceske Budejovice in the Czech Republic.

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!
Movable Scaffolding System - MSS
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

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 Underslung Form Traveller Ariari Puerto Lleras, Meta, Colombia

Underslung Form Traveller Ariari

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.

Underslung Form Traveller Ariari
Underslung Form Traveller Ariari

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 !

Underslung Form Traveller Ariari

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

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.

Movable Scaffolding System - MSS
MSS over the railway

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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