e-mosty September 2018 Vessels and Equipment Used for Bridge Construction | Page 75
Figure 15: Laying of the Hauling ropes for the north
side span by barge “Rising Sun” assisted by tug
“Marinetug1”
Figure 16 : Hauling ropes for the main span
layed onto sea bed with barge then sagged
up to position
The catwalk ropes were erected by laying them on the
sea bed and and then hauling them out of the water
during a navigation channel closure. They were then
fixed to temporary steelwork on the tower top.
The catwalk floor mesh was assembled in rolls of around
140m in length, and the steel cross-bridges used to
connect the two catwalks together, and steel stabilizers,
Figure 17: Barge “Rising Sun”
carrying Catwalk rope reels
were transported by barge to each tower location and
unloaded by 250 ton cranes on temporary working
platforms.
All these materials were lifted to tower tops by self
climbing cranes at each tower and lowered down from
the tower top to their intended position by winch.
Figure 18: Extension of the Hauling ropes for the main span
Figure 19: Extension of the Catwalk ropes for the main span
3/2018