I would like to request you to change the plan of supporting bracket for passing at Cipete Raya Station as we discussed this week.
Please refer to attached drawing for your confirmation.
Purpose for changing of supporting bracket is to complete all column head structure at Cipete Raya Station excluding C30 before passing of launching gantry.
Only C30 column head structure should not be complete before finishing of post-tensioning work at C30-CP01 as you know.
Please consider whether current false segment is applicable for C30 or not.
And please finalize the sequence for launching of gantry at Cipete Raya Station. (Kinematic)
This matter is also related to supporting bracket system.
Anyhow please finalize your plan for launching of gantry & supporting bracket system at station area within next week in order to enable to start construction of column head from 20th Jun.
Otherwise, there is possibility that this matter affect to erection work in the future.
Regarding the structural stability of column head during launching, AECOM will check take into consideration the actual structure condition & launching condition.