Composite Precast Girder at Max Bögl

05.03.2019

For many years, Max Bögl has been demonstrating its know-how in the realisation of bridge constructions of high design and technical standards, the supreme discipline of modern civil engineering, with innovative technologies and a high value added depth in the company as a whole. In addition to the usual construction methods, the bridge specialists of the company group also rely on the use of innovative Composite Precast Girders made of steel and concrete for high span widths.

Composite Precast Girder at Max Bögl

 

Functionality and aesthetics in bridge construction

The composite prefabricated construction method represents a modern and economical process for the manufacture of composite deck bridges in the span width range from 20 to 60 metres. It combines the advantages of previous composite and prefabricated construction methods. The central element is a precast composite girder consisting of a steel girder with head bolt dowels or welded-on dowel bars, onto which a concrete slab is concreted in the factory as an upper chord. Welded double T-beam constructions and airtight hollow box sections can be used as steel girders.

Efficient system for large spans

These Composite Precast Girders are significantly lighter and slimmer than prestressed concrete girders, opening up new spans for modern precast bridge construction. The Composite Precast Girder construction method combines the advantages of a high degree of prefabrication and low transport weights with short installation times and minimised pauses for the assembly of the precast elements. At Max Bögl, all work steps required for the manufacture, transport and assembly of Composite Precast Girder bridges are completely covered by the company's own personnel and equipment.

 

Interaction of the business segments

Photo: Reinhard Mederer

 

The up to 60 metre long steel girders are manufactured and coated in the steel and plant construction department of the Max Bögl Group. Concreting of the concrete flange takes place in the company's own precast factories. The Composite Precast Girders are then temporarily stored for the concrete to harden, transported to the construction site by truck, rail or ship, where they are quickly and precisely assembled with the shortest possible pauses. The civil engineering department then carries out the remaining work on site, such as formwork, concreting etc.

Advantages of the Composite Precast Girder design

  • High degree of prefabrication with low weight
  • at the same time
  • High quality of components thanks to constant production conditions
  • Realization of very slim cross-sectional dimensions in the middle of the bridge
  • Bridging even larger spans possible without center supports
  • Production, transport and assembly of finished part lengths up to 60 m
  • Robust and durable construction
  • Demanding design with maximum functionality and cost-effectiveness
  • short construction times with minimal traffic disruption
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