answer to your first question, source:http://www.3kopru.com/eng/newsfromnmmp/NEW-GIANT-CRANE-ON-THE-BRIDGE/341Great set of photos HRZMSH! What is the green apparatus(es) in the first three photos? Appears it is / they are meant to travel the main cables. Will they wrap the main cable, aid in the placement of cable bands and suspension cables? Maybe they are lifting gantries for the deck sections to be placed in the center of the span? I would think that the blue lifting gantries used during the stayed deck sections would continue on lifting the suspension sections.
Also, one of the last photos shows 9 sockets atop the tower. Are these the cables used in the tie-back process where the towers are pulled back towards shore out of plumb and eventually pulled back into plumb with each added suspension section?
answer to your second question:New giant cranes are now being used in the 3rd Bosporus Bridge Project by ICA. There has been a change in the method of steel deck placement procedure. Now, 3.000-ton carrying capacity sliding cranes consisting of 2 parts will be used for lifting the steel decks. The remaining 17 steel decks will be lifted with sliding cranes.
3. 3rd Bridge Field Supervisor said, “Lifting Gantry consists of 2 parts to be installed on the main cable; each part weighs 190 tons. Previously "Derrick Crane” was used. It was on the steel decks and lifted the next deck by anchoring itself on the previous deck. We will be using a new system here. Montage of the sliding crane has been made on the D14 steel deck. At this stage, the new giant crane (lifting gantry) will be lifted sideways to pass between the main cable and rotated 90 degrees with the help of a rotating stand on the main cable. All of these processes, as well as steel deck lifting works will be done simultaneously in European and Asian sides.”
No it won't, there is no way the bridge and motorway approaches will be finished by May. Too big a job.The Yavuz Sultan Selim Bridge, the third bridge over the Bosporus in Istanbul, will begin service starting in April or May of 2016, said the Minister of Transport, Maritime and Communication Binali Yıldırım on Tuesday.
Construction of the bridge is about 88 percent completed, Yıldırım said, who further added that the bridge will ease Istanbul's traffic