The district St. Margareten in Vienna is characterized by a
heterogeneous environment, transport axes, Underground- and tram lines.To
enhance the quality of the location the city of Vienna is planning to
build a bridge as a connection between the existing parkland and a
landscape architecture yet to be designed. With its sculptural
character, the independent freeformed frame structure creates a venue of
striking identity, while at the same time integrating itself into the
existing setting. Areas and pathways of sojourn quality are to be
created on the bridge, as well as underneath. With a gradient of under 4
degrees the bridge meets the needs of cyclists and the handicapped
alike. A good public view, an harmonious path layout as well as
excellent illumination both above and below the bridge make it readily
accessible for pedestrians and cyclists. Due to a systematic use of
large quantities of the locally available CO2 store timber, and a low
processing depth, the footbridge, comprising a freeformed structure of
laminated timber girders, results in an exemplary positive CO2 balance
and the integral view of Energy in terms of grey energy and efficiency
of recycling. The semi-integral bridge structure has been designed as
continuous beam with cross sections of variable height and shape. The
landing is firmly connected to the columns. All columns are made of
reinforced concrete, the foundation comprises pile caps and large bored
piles. The bridge structure comprises a solid glue-laminated timber
structure in block bond with a load-bearing core made of fir wood and an
exterior cladding of larch wood. The materials are joined by
screw-clamp gluing at the manufactory and by threaded bolts on site. The
lateral surfaces are protected by sufficient overlapping and a
hydrophobe glazing.