In-addition
.
1) When remove/out the existing concrete coat and "does not cut along the circumference"
concrete can remove/out as long as the cutting wire on "top and bottom" of pipe. detail as vdo
.
2) Request TRC to improve stair and addition Handrail when working on pipe with concrete coat.
3) Due to the "concrete existing coat" is remain more than 1.6 km
and TRC are working to improve the process, to suit the time available.
4) TRC shall be reports, for revise method as soon.
..
sorry for lated update