Construction—EMEA—Luxembourg—Bridges
Slim Duct DYNA Grip ® Stay Cables:
The Mersch Stay Cable Bridge
In the community of Mersch in Luxembourg, a new, 260m long, 4 span stay cable bridge with span lengths of 2 x 43.3m and 2 x 86.7m
and two 30m high pylons was recently built. The Pont Haubané Mersch is the world’s first stay cable bridge to feature stainless steel
slim ducts. Beginning with the preliminary planning stage, DSI provided advice for the project and took on architectural and technical
responsibilities once the project had been awarded.
For the special stainless steel stay cable
ducts (stainless steel grades 1.4307 and
1.4404), DSI searched for a suitable partner
for the welding work, special components
and surface processing. Furthermore, an
assembly concept had to be developed for
the stainless steel ducts that are considerably
more susceptible to damage and less
elastic than common ducts. Finally, a new
strand lifting concept was used that was a
European first. The existing welding machine
also had to be remodeled completely in
order to meet the changed requirements.
The Hintzen Edelstahlverarbeitung Company
produced the technically and architecturally
vital special components – vandalism
protection pipes, transition ducts, sleeves
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and flange ducts – and carried out the welding
work on the continuous ducts. The Börsting
Company, a specialist for stainless steel
surface processing, presented several different
polished sections to the customer in advance
and achieved the chosen surface appearance
professionally on all stainless steel parts.
20-80m long Types DG-P37 and DG-P31
DYNA Grip ® Stay Cables were used for this
project; the Type DG-P31 stay cables were
filled with 27 strands. In total, DSI supplied
42t of grade 1860N/mm², 150mm² strand
for the stay cables. For the slim duct that
had been chosen by the engineer (Slim-
Duct, 156.0 x 3.0mm), DSI had to provide
procedural concept studies for the supporting
strands due to the limited sp