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