The Bridge of Sancho el Mayor, in Navarra, crosses the river Ebro and is
part of the A-15 highway. It was built in 1978 by civil engineers Javier
Manterola and Leonardo Fernández Toyano and as a cable-stayed bridge.
It has a total length of 204 meters, a width of 29 m and a main light
span of 142 m, to which are added two side openings on the left bank of
the river. It was built with precast keystones using the "cantilever"
technique (the bridge is constructed in outward projections that are
added on). This suspension bridge is supported on a single pier located
on the axis of the road with 35 pairs of twin cables, At the time it
was built it was one of the most innovative bridges in design and
materials.
A typical cable-stayed bridge is a continuous girder with one or two
towers erected above piers in the middle of the span. From these piers,
cables are attached diagonally to the girder to provide additional
support. Engineering wise they stand in between counter steel bridges
and suspension bridges. This type of bridge began ito be built n the
late 19th century and its use was widespread after World War II, thanks
to the technical development of the construction materials and the
structural empowerment via computers.
Over the river Carrion in the city of Palencia stands the historic
Puente de Puentecillas, the oldest bridge in town. Its original layout
dates back to Roman times and it has undergone many changes since the
11th century, the most important of which took place in the 16th century
when the current outline of the bridge was set and the remains of the
Roman bridge disappeared. It stands in the city centre close to the
Cathedral and other monuments and has become a popular walking area with
plenty of green spaces. At the entrance of the bridge is the famous
Bolo de la Paciencia, where washerwomen leaned their baskets of clothes
while chatting. For years it has been a towns meeting place
Stamp Issue: 2013.06.20
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