Last August families, tourists and workers fell to their deaths and 600 people lost homes when the cable stays
broke on the structure.
MILAN: An engineering study commissioned by Italian highway operator Autostrade last year warned about the state of the concrete-encased cable stays
that held up a bridge that collapsed this week in Genoa, two Italian newspapers reported on Friday.
The design includes a net of steel cable stays
that attach to a central reinforced concrete column that will reach into the skies.
The main bridge deck will be made from reinforced concrete and the spans will be supported by steel cable stays
attached to towers rising up to between 80 and 125m above the river bed.
Subsea 7 will permanently repair Siri's damaged subsea structure by installing cable stays
between the platform legs and by securing the caisson through the installation of a support structure connected to the wellhead caisson.
Since a high pretension force exists in inclined cable stays
, the towers and part of the girders are subjected to large compression; this means that the beam-column effect has to be taken into consideration for girders and towers of the cable-stayed bridge.
The series also features high cable retention to ensure that the cable stays
in place in demanding applications.
Right now crews are adjusting the cable stays
and assembling the last two fill sections.
With its graceful cable stays
and two 266-ft-high towers, the new bridge will be a symbol linking the city's future to its historic past.
Maintaining the traffic flow from the existing I-93 to Storrow Drive effected the layout of the cable stays
. It was necessary to move the back-span stay-cable connections to the superstructure from the edge (from the outside similar to the main span) to the center.
Leaded ridges provide ballast, and the structures are further anchored at three points by metal cable stays
running 30m down the outside of the ancient masonry to be fixed to the rock.
Layers of horizontal silk-screened glass slats held in place by cable stays
act as diffusing brises soleils.