Box Girder Bridge in Ijsselstein - NL

Wide Span Functional Bridge  

Client: Dienst Landelijk Gebied

Year of construction: 2006

Length: 117,00 m
Width: 3,00 m

Structure: Several glulam beams form a box girder that carries the traffic load, mastic asphalt decking protects the timber structure, steel railings and glulam handrail

Our service: Design planning and detailed engineering (voorlopig ontwerp und definitief ontwerp) - Comparable to service phase 1 - 5 according to German HOAI


Contemporary functional stuctures acquired their character simply by dimensioning with wood. The innovative box girder design makes wide spans with low overall height possible, here 35 m length at about 1.20 m height. A decking of mastic asphalt creates the necessary roof for the large-sized prefabricated elements. Inside the box girders run invisibly external supply lines.

To increase the durability a cladding made of high quality western red cedar was retrofitted. Thus, the bridge protected on the top and sides - according to the current fee guidelines a lifetime of over 60 years can be expected. Recent studies indicate that protected timber bridges may have a much longer lifespan.

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