Repair and reconstruction of engineering structures - Assessment and Refurbishment of Steel Structures - page 192

The proposal for reconstruction
Two pairs of new load-bearing cables of diameter 60 m were laid parallel to the old
cables, and the original pylon saddles and load-bearing suspended cross-frames were
modified. The original saddles for pairs of load-bearing cables were extended on both
sides by means of two additional saddles of identical shape (Figure 6.8). The cables were
connected to the saddle by pressure plates and completed stops on both sides of the pylon
head, designed to bear a friction force of 200 kN. The suspended cross-frames on the
load-bearing cables were divided so they were
Figure 6.8 (a) Arrangement of
additional saddles, (b) modification of
the saddles
independent for each pair of cables. From the outer sides the top of the crossframe a new
anchoring device was fitted (Figure 6.9). The T-shape clips for the load-bearing cables
were secured against lifting by bolted lower plates, and against shifting on the cables by
individual stops designed to bear a friction force of 65 kN in the region where the
suspension was longest.