Using trapezoidal sections in superstructure bridge design, especially in the orthotropic deck, improves overall bridge economy by enabling structures to be optimized.
Benefits of using trapezoidal sections:
- Long lengths without welding joints
- Good accuracy in cross-sectional dimensions and straightness
- Easy surface treatment, lower costs
Applications:
- Road bridges
- Railway bridges
- Light-traffic bridges
Availability
Production range
- Wall thicknesses 4-10 mm, typical 6-8 mm
-
Main dimensions
- max strip width 820 mm
- inner corner radius R25 or R15
- max height 300 mm
- Lengths from production:
- roll forming doesn’t limit the length of the profile
- typical length 10-13,5 m
- max. length 21 m without welded splice
Steel grades
Standard steel grade S355J2C+N acc. to EN10025-2
Other steel grades according to standards:
- EN 10025-3, normalised rolled weldable fine grain structural steels
- EN 10025-4, thermomechanically rolled weldable fine grain structural steels
- EN 10025-5 Structural steels with improved atmospheric corrosion resistance
- EN 10149-2, thermomechanically rolled high yield strength steels for cold forming
Other steel grades on request
Order & delivery
To order trapezoidal sections, please contact our sales. Trapezoidal sections are customised for each application and they are manufactured to the desired length.
SSAB applies the General Conditions, ALBIF 2000, for deliveries with the addition that the parties will comply with applicable legislative and regulatory requirements and refrain from participating in any corrupt business practices.
The technical terms of delivery for cold-rolled sections manufactured by SSAB are in accordance with the EN 10162 when applicable. Technical delivery conditions can also be agreed case by case.
Trapezoidal sections are delivered with bundle tags to enable full traceability.
Type 3.1 material certificate will be provided according to the standard EN 10204, Type 3.2 is available on request. DB certificate according to BN 918002-02 is available on request.
Environmental responsibility and sustainability
SSAB develops new products and services in order to improve our customers’ performance in sustainability and overall efficiency.
Life cycle assessment data for SSAB’s products are available in the form of Environmental product declarations (EPDs). Manufacturing chain from raw material to finished product is carefully managed.
SSAB has introduced CE marking for infrastructure products. Declarations of Performance (DoP) indicate the technical characteristics of CE-marked products.
Customer cases
-
Waterproofing of the earth dam of the Melo power plant
The Kokemäenjoki river is one of the most important hydropower production areas in Finland. The Melo hydroelectric power plant in Nokia was built in the Kokemäenjoki river basin at the turn of the 1970s. The fall height of the power plant is 20 meters. In total, the dam is 123 meters long. The power plant has a capacity of 68 megawatts and an annual production of 200 GWh.
-
Pumping station 40 - Luleå
Luleå is a region in growth. Its existing water and waste system is now 60-100 years old and in great need of upgrading to deal with the growing population. By 2040, the population is expected to reach 100 000 inhabitants. “Östre länken” was initiated in 2014 and will be ready in 2026. It consists of 4 new pumping stations and 20 km of water pipes with a diameter of up to 2 meters. This is Luleå Municipality’s biggest construction project ever and has an estimated price tag of up to SEK 2bn. There are already 70 pumping stations in the area to ensure the transportation of fresh water from the Lule River to end users and then transport the used water back to Uddebo wastewater treatment plant.
-
Helen decreased carbon footprint in Vuosaari power plant by using SSAB’s higher strength steel tubes
LOGSTOR Finland delivered to Helen Vuosaari power plant district heating pipe line that were produced with thinner steel core pipelines made of higher strength steel. This was the first large size project for Helen to use higher strength steel in district heating pipeline. Higher steel grade enables customer to use lower material thickness tubes in steel core of pipelines which not only reduce weight of the pipes during the transportation but also prolongs lifetime of the pipelines. Power plant is benefiting of the longer lifetime compared with traditional solution and at the same time environment aspect with lower carbon footprint are enabled.