Elegance in innovation
Winner of a 2010 international design competition, the 380m-long bridge at Margaretengürtel in Vienna links two areas of urban parkland to provide a pedestrian-friendly route across a busy traffic corridor.
The linear form of the bridge evolves from the landscape at each end and its massive minimalism stands in counterpoint to the rich architectural language of the neighbourhood, including the historic Margaretengürtel Station building by Otto Wagner.
The hybrid structure uses a glulam core of Spruce ‘lamella’ and a Larch outer layer which provides durability and good protection against moisture. The bending radii of the glulam layers are easily achieved using standard production techniques and areas of peak stresses are reinforced with threaded steel rods. The robust construction method combines with the concept of a semi-integral bridge to significantly reduce maintenance costs.
This innovative development of traditional timber building techniques is a graphic demonstration of elegant and environmentally responsible construction, being both a carbon sink and an efficient use of resources. Using a locally common building material with a low processing cost, it is estimated the superstructure will contain approximately 795t of stored CO2 within the 960m3 of wood and will use a fraction of the energy in construction of a concrete or steel bridge of the same span.